Gasket Questions
#21
Guest
Posts: n/a
Re: Gasket Questions
It makes a tapping/clicking noise. A valve only opens once every second
engine stroke so a valve tap is slower than say piston slap which
happens every stroke. If you put a timing light on, the valve will tap
every second flash.
Some of those 4.0 engines do suffer from the occasional piston slap when
cold. This won't hurt anything and cannot be repaired without a total
engine job.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Peter Pontbriand wrote:
>
> What kind of noise does a "noisy lifter" make? I'm curious because my '02 TJ
> 4.0 has an intermittent "thunking" sound (with accompanying vibration) at
> idle. I've no idea what that could be, and because it doesn't consistently
> do it I haven't been able to take it to a shop.
>
> /Peter
>
> "Miguel Londono" <miguellondono@usa.net> wrote in message
> news:41872bc1$1_1@news.cybersurf.net...
> > I also have a 93 yj with the 4.0 with a noisy lifter, my question is: will
> > the lifters come out without removing the cylinder head? My factory manual
> > claims it can be done both ways, true??
> >
> >
> >
> > "Joe and Joann" <mauijoe@maui.net> wrote in message
> > news:vBghd.33663$Kl3.418@twister.socal.rr.com...
> > >I am getting ready to change a noisy lifter in my '90 YJ 4.2L. Three
> > >questions:
> > > 1) The Haynes manual says to use Perfect Seal sealing compound on the
> > > head gasket for the 4.2 L. I have an OEM replacement head gasket. I
> > > thought I had read in this newsgroup that no sealer should be used with
> > > the head gasket. Any thoughts on this?
> > > 2) From what I have been able to find, early 4.2s used a gasket that
> > > covers both the intake and exhaust manifolds and later engines were
> > > equipped with an intake manifold gasket only. Since I haven't gotten
> > > things apart yet, I don't know what kind I have. If you use the full
> > > length gasket that covers the intake and exhaust manifolds, do you still
> > > need gasket that is for the intake manifold only. Even if the existing
> > > gasket was the one for the intake only, would I be better off going to
> the
> > > gasket that covers both?
> > > 3) I have the aluminum valve cover. Whats the best sealant to use on the
> > > cork gasket? Is it best to put the sealer on both sides? Thin coat or
> > > thick?
> > >
> > > Thanks
> > > Joe in Maui HI
> >
> >
engine stroke so a valve tap is slower than say piston slap which
happens every stroke. If you put a timing light on, the valve will tap
every second flash.
Some of those 4.0 engines do suffer from the occasional piston slap when
cold. This won't hurt anything and cannot be repaired without a total
engine job.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Peter Pontbriand wrote:
>
> What kind of noise does a "noisy lifter" make? I'm curious because my '02 TJ
> 4.0 has an intermittent "thunking" sound (with accompanying vibration) at
> idle. I've no idea what that could be, and because it doesn't consistently
> do it I haven't been able to take it to a shop.
>
> /Peter
>
> "Miguel Londono" <miguellondono@usa.net> wrote in message
> news:41872bc1$1_1@news.cybersurf.net...
> > I also have a 93 yj with the 4.0 with a noisy lifter, my question is: will
> > the lifters come out without removing the cylinder head? My factory manual
> > claims it can be done both ways, true??
> >
> >
> >
> > "Joe and Joann" <mauijoe@maui.net> wrote in message
> > news:vBghd.33663$Kl3.418@twister.socal.rr.com...
> > >I am getting ready to change a noisy lifter in my '90 YJ 4.2L. Three
> > >questions:
> > > 1) The Haynes manual says to use Perfect Seal sealing compound on the
> > > head gasket for the 4.2 L. I have an OEM replacement head gasket. I
> > > thought I had read in this newsgroup that no sealer should be used with
> > > the head gasket. Any thoughts on this?
> > > 2) From what I have been able to find, early 4.2s used a gasket that
> > > covers both the intake and exhaust manifolds and later engines were
> > > equipped with an intake manifold gasket only. Since I haven't gotten
> > > things apart yet, I don't know what kind I have. If you use the full
> > > length gasket that covers the intake and exhaust manifolds, do you still
> > > need gasket that is for the intake manifold only. Even if the existing
> > > gasket was the one for the intake only, would I be better off going to
> the
> > > gasket that covers both?
> > > 3) I have the aluminum valve cover. Whats the best sealant to use on the
> > > cork gasket? Is it best to put the sealer on both sides? Thin coat or
> > > thick?
> > >
> > > Thanks
> > > Joe in Maui HI
> >
> >
#22
Guest
Posts: n/a
Re: Gasket Questions
It makes a tapping/clicking noise. A valve only opens once every second
engine stroke so a valve tap is slower than say piston slap which
happens every stroke. If you put a timing light on, the valve will tap
every second flash.
Some of those 4.0 engines do suffer from the occasional piston slap when
cold. This won't hurt anything and cannot be repaired without a total
engine job.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Peter Pontbriand wrote:
>
> What kind of noise does a "noisy lifter" make? I'm curious because my '02 TJ
> 4.0 has an intermittent "thunking" sound (with accompanying vibration) at
> idle. I've no idea what that could be, and because it doesn't consistently
> do it I haven't been able to take it to a shop.
>
> /Peter
>
> "Miguel Londono" <miguellondono@usa.net> wrote in message
> news:41872bc1$1_1@news.cybersurf.net...
> > I also have a 93 yj with the 4.0 with a noisy lifter, my question is: will
> > the lifters come out without removing the cylinder head? My factory manual
> > claims it can be done both ways, true??
> >
> >
> >
> > "Joe and Joann" <mauijoe@maui.net> wrote in message
> > news:vBghd.33663$Kl3.418@twister.socal.rr.com...
> > >I am getting ready to change a noisy lifter in my '90 YJ 4.2L. Three
> > >questions:
> > > 1) The Haynes manual says to use Perfect Seal sealing compound on the
> > > head gasket for the 4.2 L. I have an OEM replacement head gasket. I
> > > thought I had read in this newsgroup that no sealer should be used with
> > > the head gasket. Any thoughts on this?
> > > 2) From what I have been able to find, early 4.2s used a gasket that
> > > covers both the intake and exhaust manifolds and later engines were
> > > equipped with an intake manifold gasket only. Since I haven't gotten
> > > things apart yet, I don't know what kind I have. If you use the full
> > > length gasket that covers the intake and exhaust manifolds, do you still
> > > need gasket that is for the intake manifold only. Even if the existing
> > > gasket was the one for the intake only, would I be better off going to
> the
> > > gasket that covers both?
> > > 3) I have the aluminum valve cover. Whats the best sealant to use on the
> > > cork gasket? Is it best to put the sealer on both sides? Thin coat or
> > > thick?
> > >
> > > Thanks
> > > Joe in Maui HI
> >
> >
engine stroke so a valve tap is slower than say piston slap which
happens every stroke. If you put a timing light on, the valve will tap
every second flash.
Some of those 4.0 engines do suffer from the occasional piston slap when
cold. This won't hurt anything and cannot be repaired without a total
engine job.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Peter Pontbriand wrote:
>
> What kind of noise does a "noisy lifter" make? I'm curious because my '02 TJ
> 4.0 has an intermittent "thunking" sound (with accompanying vibration) at
> idle. I've no idea what that could be, and because it doesn't consistently
> do it I haven't been able to take it to a shop.
>
> /Peter
>
> "Miguel Londono" <miguellondono@usa.net> wrote in message
> news:41872bc1$1_1@news.cybersurf.net...
> > I also have a 93 yj with the 4.0 with a noisy lifter, my question is: will
> > the lifters come out without removing the cylinder head? My factory manual
> > claims it can be done both ways, true??
> >
> >
> >
> > "Joe and Joann" <mauijoe@maui.net> wrote in message
> > news:vBghd.33663$Kl3.418@twister.socal.rr.com...
> > >I am getting ready to change a noisy lifter in my '90 YJ 4.2L. Three
> > >questions:
> > > 1) The Haynes manual says to use Perfect Seal sealing compound on the
> > > head gasket for the 4.2 L. I have an OEM replacement head gasket. I
> > > thought I had read in this newsgroup that no sealer should be used with
> > > the head gasket. Any thoughts on this?
> > > 2) From what I have been able to find, early 4.2s used a gasket that
> > > covers both the intake and exhaust manifolds and later engines were
> > > equipped with an intake manifold gasket only. Since I haven't gotten
> > > things apart yet, I don't know what kind I have. If you use the full
> > > length gasket that covers the intake and exhaust manifolds, do you still
> > > need gasket that is for the intake manifold only. Even if the existing
> > > gasket was the one for the intake only, would I be better off going to
> the
> > > gasket that covers both?
> > > 3) I have the aluminum valve cover. Whats the best sealant to use on the
> > > cork gasket? Is it best to put the sealer on both sides? Thin coat or
> > > thick?
> > >
> > > Thanks
> > > Joe in Maui HI
> >
> >
#23
Guest
Posts: n/a
Re: Gasket Questions
A noisy lifter is more of a ticking sound.
Peter Pontbriand wrote:
> What kind of noise does a "noisy lifter" make? I'm curious because my '02 TJ
> 4.0 has an intermittent "thunking" sound (with accompanying vibration) at
> idle. I've no idea what that could be, and because it doesn't consistently
> do it I haven't been able to take it to a shop.
>
> /Peter
>
> "Miguel Londono" <miguellondono@usa.net> wrote in message
> news:41872bc1$1_1@news.cybersurf.net...
>
>>I also have a 93 yj with the 4.0 with a noisy lifter, my question is: will
>>the lifters come out without removing the cylinder head? My factory manual
>>claims it can be done both ways, true??
>>
>>
>>
>>"Joe and Joann" <mauijoe@maui.net> wrote in message
>>news:vBghd.33663$Kl3.418@twister.socal.rr.com. ..
>>
>>>I am getting ready to change a noisy lifter in my '90 YJ 4.2L. Three
>>>questions:
>>>1) The Haynes manual says to use Perfect Seal sealing compound on the
>>>head gasket for the 4.2 L. I have an OEM replacement head gasket. I
>>>thought I had read in this newsgroup that no sealer should be used with
>>>the head gasket. Any thoughts on this?
>>>2) From what I have been able to find, early 4.2s used a gasket that
>>>covers both the intake and exhaust manifolds and later engines were
>>>equipped with an intake manifold gasket only. Since I haven't gotten
>>>things apart yet, I don't know what kind I have. If you use the full
>>>length gasket that covers the intake and exhaust manifolds, do you still
>>>need gasket that is for the intake manifold only. Even if the existing
>>>gasket was the one for the intake only, would I be better off going to
>
> the
>
>>>gasket that covers both?
>>>3) I have the aluminum valve cover. Whats the best sealant to use on the
>>>cork gasket? Is it best to put the sealer on both sides? Thin coat or
>>>thick?
>>>
>>>Thanks
>>>Joe in Maui HI
>>
>>
>
>
--
__________________________________________________ _________
tw
71 Bill Stroppe Baja Bronco
03 TJ Rubicon - Rubicon Express 4.5"
01 XJ Sport
There is a very fine line between "hobby" and "mental illness."
-- Dave Barry
Pronunciation: 'jEp
Function: noun
Date: 1940
Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.
(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________
Peter Pontbriand wrote:
> What kind of noise does a "noisy lifter" make? I'm curious because my '02 TJ
> 4.0 has an intermittent "thunking" sound (with accompanying vibration) at
> idle. I've no idea what that could be, and because it doesn't consistently
> do it I haven't been able to take it to a shop.
>
> /Peter
>
> "Miguel Londono" <miguellondono@usa.net> wrote in message
> news:41872bc1$1_1@news.cybersurf.net...
>
>>I also have a 93 yj with the 4.0 with a noisy lifter, my question is: will
>>the lifters come out without removing the cylinder head? My factory manual
>>claims it can be done both ways, true??
>>
>>
>>
>>"Joe and Joann" <mauijoe@maui.net> wrote in message
>>news:vBghd.33663$Kl3.418@twister.socal.rr.com. ..
>>
>>>I am getting ready to change a noisy lifter in my '90 YJ 4.2L. Three
>>>questions:
>>>1) The Haynes manual says to use Perfect Seal sealing compound on the
>>>head gasket for the 4.2 L. I have an OEM replacement head gasket. I
>>>thought I had read in this newsgroup that no sealer should be used with
>>>the head gasket. Any thoughts on this?
>>>2) From what I have been able to find, early 4.2s used a gasket that
>>>covers both the intake and exhaust manifolds and later engines were
>>>equipped with an intake manifold gasket only. Since I haven't gotten
>>>things apart yet, I don't know what kind I have. If you use the full
>>>length gasket that covers the intake and exhaust manifolds, do you still
>>>need gasket that is for the intake manifold only. Even if the existing
>>>gasket was the one for the intake only, would I be better off going to
>
> the
>
>>>gasket that covers both?
>>>3) I have the aluminum valve cover. Whats the best sealant to use on the
>>>cork gasket? Is it best to put the sealer on both sides? Thin coat or
>>>thick?
>>>
>>>Thanks
>>>Joe in Maui HI
>>
>>
>
>
--
__________________________________________________ _________
tw
71 Bill Stroppe Baja Bronco
03 TJ Rubicon - Rubicon Express 4.5"
01 XJ Sport
There is a very fine line between "hobby" and "mental illness."
-- Dave Barry
Pronunciation: 'jEp
Function: noun
Date: 1940
Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.
(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________
#24
Guest
Posts: n/a
Re: Gasket Questions
A noisy lifter is more of a ticking sound.
Peter Pontbriand wrote:
> What kind of noise does a "noisy lifter" make? I'm curious because my '02 TJ
> 4.0 has an intermittent "thunking" sound (with accompanying vibration) at
> idle. I've no idea what that could be, and because it doesn't consistently
> do it I haven't been able to take it to a shop.
>
> /Peter
>
> "Miguel Londono" <miguellondono@usa.net> wrote in message
> news:41872bc1$1_1@news.cybersurf.net...
>
>>I also have a 93 yj with the 4.0 with a noisy lifter, my question is: will
>>the lifters come out without removing the cylinder head? My factory manual
>>claims it can be done both ways, true??
>>
>>
>>
>>"Joe and Joann" <mauijoe@maui.net> wrote in message
>>news:vBghd.33663$Kl3.418@twister.socal.rr.com. ..
>>
>>>I am getting ready to change a noisy lifter in my '90 YJ 4.2L. Three
>>>questions:
>>>1) The Haynes manual says to use Perfect Seal sealing compound on the
>>>head gasket for the 4.2 L. I have an OEM replacement head gasket. I
>>>thought I had read in this newsgroup that no sealer should be used with
>>>the head gasket. Any thoughts on this?
>>>2) From what I have been able to find, early 4.2s used a gasket that
>>>covers both the intake and exhaust manifolds and later engines were
>>>equipped with an intake manifold gasket only. Since I haven't gotten
>>>things apart yet, I don't know what kind I have. If you use the full
>>>length gasket that covers the intake and exhaust manifolds, do you still
>>>need gasket that is for the intake manifold only. Even if the existing
>>>gasket was the one for the intake only, would I be better off going to
>
> the
>
>>>gasket that covers both?
>>>3) I have the aluminum valve cover. Whats the best sealant to use on the
>>>cork gasket? Is it best to put the sealer on both sides? Thin coat or
>>>thick?
>>>
>>>Thanks
>>>Joe in Maui HI
>>
>>
>
>
--
__________________________________________________ _________
tw
71 Bill Stroppe Baja Bronco
03 TJ Rubicon - Rubicon Express 4.5"
01 XJ Sport
There is a very fine line between "hobby" and "mental illness."
-- Dave Barry
Pronunciation: 'jEp
Function: noun
Date: 1940
Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.
(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________
Peter Pontbriand wrote:
> What kind of noise does a "noisy lifter" make? I'm curious because my '02 TJ
> 4.0 has an intermittent "thunking" sound (with accompanying vibration) at
> idle. I've no idea what that could be, and because it doesn't consistently
> do it I haven't been able to take it to a shop.
>
> /Peter
>
> "Miguel Londono" <miguellondono@usa.net> wrote in message
> news:41872bc1$1_1@news.cybersurf.net...
>
>>I also have a 93 yj with the 4.0 with a noisy lifter, my question is: will
>>the lifters come out without removing the cylinder head? My factory manual
>>claims it can be done both ways, true??
>>
>>
>>
>>"Joe and Joann" <mauijoe@maui.net> wrote in message
>>news:vBghd.33663$Kl3.418@twister.socal.rr.com. ..
>>
>>>I am getting ready to change a noisy lifter in my '90 YJ 4.2L. Three
>>>questions:
>>>1) The Haynes manual says to use Perfect Seal sealing compound on the
>>>head gasket for the 4.2 L. I have an OEM replacement head gasket. I
>>>thought I had read in this newsgroup that no sealer should be used with
>>>the head gasket. Any thoughts on this?
>>>2) From what I have been able to find, early 4.2s used a gasket that
>>>covers both the intake and exhaust manifolds and later engines were
>>>equipped with an intake manifold gasket only. Since I haven't gotten
>>>things apart yet, I don't know what kind I have. If you use the full
>>>length gasket that covers the intake and exhaust manifolds, do you still
>>>need gasket that is for the intake manifold only. Even if the existing
>>>gasket was the one for the intake only, would I be better off going to
>
> the
>
>>>gasket that covers both?
>>>3) I have the aluminum valve cover. Whats the best sealant to use on the
>>>cork gasket? Is it best to put the sealer on both sides? Thin coat or
>>>thick?
>>>
>>>Thanks
>>>Joe in Maui HI
>>
>>
>
>
--
__________________________________________________ _________
tw
71 Bill Stroppe Baja Bronco
03 TJ Rubicon - Rubicon Express 4.5"
01 XJ Sport
There is a very fine line between "hobby" and "mental illness."
-- Dave Barry
Pronunciation: 'jEp
Function: noun
Date: 1940
Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.
(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________
#25
Guest
Posts: n/a
Re: Gasket Questions
A noisy lifter is more of a ticking sound.
Peter Pontbriand wrote:
> What kind of noise does a "noisy lifter" make? I'm curious because my '02 TJ
> 4.0 has an intermittent "thunking" sound (with accompanying vibration) at
> idle. I've no idea what that could be, and because it doesn't consistently
> do it I haven't been able to take it to a shop.
>
> /Peter
>
> "Miguel Londono" <miguellondono@usa.net> wrote in message
> news:41872bc1$1_1@news.cybersurf.net...
>
>>I also have a 93 yj with the 4.0 with a noisy lifter, my question is: will
>>the lifters come out without removing the cylinder head? My factory manual
>>claims it can be done both ways, true??
>>
>>
>>
>>"Joe and Joann" <mauijoe@maui.net> wrote in message
>>news:vBghd.33663$Kl3.418@twister.socal.rr.com. ..
>>
>>>I am getting ready to change a noisy lifter in my '90 YJ 4.2L. Three
>>>questions:
>>>1) The Haynes manual says to use Perfect Seal sealing compound on the
>>>head gasket for the 4.2 L. I have an OEM replacement head gasket. I
>>>thought I had read in this newsgroup that no sealer should be used with
>>>the head gasket. Any thoughts on this?
>>>2) From what I have been able to find, early 4.2s used a gasket that
>>>covers both the intake and exhaust manifolds and later engines were
>>>equipped with an intake manifold gasket only. Since I haven't gotten
>>>things apart yet, I don't know what kind I have. If you use the full
>>>length gasket that covers the intake and exhaust manifolds, do you still
>>>need gasket that is for the intake manifold only. Even if the existing
>>>gasket was the one for the intake only, would I be better off going to
>
> the
>
>>>gasket that covers both?
>>>3) I have the aluminum valve cover. Whats the best sealant to use on the
>>>cork gasket? Is it best to put the sealer on both sides? Thin coat or
>>>thick?
>>>
>>>Thanks
>>>Joe in Maui HI
>>
>>
>
>
--
__________________________________________________ _________
tw
71 Bill Stroppe Baja Bronco
03 TJ Rubicon - Rubicon Express 4.5"
01 XJ Sport
There is a very fine line between "hobby" and "mental illness."
-- Dave Barry
Pronunciation: 'jEp
Function: noun
Date: 1940
Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.
(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________
Peter Pontbriand wrote:
> What kind of noise does a "noisy lifter" make? I'm curious because my '02 TJ
> 4.0 has an intermittent "thunking" sound (with accompanying vibration) at
> idle. I've no idea what that could be, and because it doesn't consistently
> do it I haven't been able to take it to a shop.
>
> /Peter
>
> "Miguel Londono" <miguellondono@usa.net> wrote in message
> news:41872bc1$1_1@news.cybersurf.net...
>
>>I also have a 93 yj with the 4.0 with a noisy lifter, my question is: will
>>the lifters come out without removing the cylinder head? My factory manual
>>claims it can be done both ways, true??
>>
>>
>>
>>"Joe and Joann" <mauijoe@maui.net> wrote in message
>>news:vBghd.33663$Kl3.418@twister.socal.rr.com. ..
>>
>>>I am getting ready to change a noisy lifter in my '90 YJ 4.2L. Three
>>>questions:
>>>1) The Haynes manual says to use Perfect Seal sealing compound on the
>>>head gasket for the 4.2 L. I have an OEM replacement head gasket. I
>>>thought I had read in this newsgroup that no sealer should be used with
>>>the head gasket. Any thoughts on this?
>>>2) From what I have been able to find, early 4.2s used a gasket that
>>>covers both the intake and exhaust manifolds and later engines were
>>>equipped with an intake manifold gasket only. Since I haven't gotten
>>>things apart yet, I don't know what kind I have. If you use the full
>>>length gasket that covers the intake and exhaust manifolds, do you still
>>>need gasket that is for the intake manifold only. Even if the existing
>>>gasket was the one for the intake only, would I be better off going to
>
> the
>
>>>gasket that covers both?
>>>3) I have the aluminum valve cover. Whats the best sealant to use on the
>>>cork gasket? Is it best to put the sealer on both sides? Thin coat or
>>>thick?
>>>
>>>Thanks
>>>Joe in Maui HI
>>
>>
>
>
--
__________________________________________________ _________
tw
71 Bill Stroppe Baja Bronco
03 TJ Rubicon - Rubicon Express 4.5"
01 XJ Sport
There is a very fine line between "hobby" and "mental illness."
-- Dave Barry
Pronunciation: 'jEp
Function: noun
Date: 1940
Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.
(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________
#26
Guest
Posts: n/a
Re: Gasket Questions
Ok, thanks. It's not a 'when cold' thing though - if anything it happens
more when the engine is warm than when it is cold. The sound seems to occur
about four or five times per second when idling at 500 RPM, which makes it 1
sound per 2 rotations of the crank. So, more likely a valvetrain thing than
piston slap, right?
Can much harm come from ignoring it?
/Peter
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:4187B7D9.91ACFB04@sympatico.ca...
> It makes a tapping/clicking noise. A valve only opens once every second
> engine stroke so a valve tap is slower than say piston slap which
> happens every stroke. If you put a timing light on, the valve will tap
> every second flash.
>
> Some of those 4.0 engines do suffer from the occasional piston slap when
> cold. This won't hurt anything and cannot be repaired without a total
> engine job.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Peter Pontbriand wrote:
> >
> > What kind of noise does a "noisy lifter" make? I'm curious because my
'02 TJ
> > 4.0 has an intermittent "thunking" sound (with accompanying vibration)
at
> > idle. I've no idea what that could be, and because it doesn't
consistently
> > do it I haven't been able to take it to a shop.
> >
> > /Peter
> >
> > "Miguel Londono" <miguellondono@usa.net> wrote in message
> > news:41872bc1$1_1@news.cybersurf.net...
> > > I also have a 93 yj with the 4.0 with a noisy lifter, my question is:
will
> > > the lifters come out without removing the cylinder head? My factory
manual
> > > claims it can be done both ways, true??
> > >
> > >
> > >
> > > "Joe and Joann" <mauijoe@maui.net> wrote in message
> > > news:vBghd.33663$Kl3.418@twister.socal.rr.com...
> > > >I am getting ready to change a noisy lifter in my '90 YJ 4.2L. Three
> > > >questions:
> > > > 1) The Haynes manual says to use Perfect Seal sealing compound on
the
> > > > head gasket for the 4.2 L. I have an OEM replacement head gasket. I
> > > > thought I had read in this newsgroup that no sealer should be used
with
> > > > the head gasket. Any thoughts on this?
> > > > 2) From what I have been able to find, early 4.2s used a gasket that
> > > > covers both the intake and exhaust manifolds and later engines were
> > > > equipped with an intake manifold gasket only. Since I haven't gotten
> > > > things apart yet, I don't know what kind I have. If you use the full
> > > > length gasket that covers the intake and exhaust manifolds, do you
still
> > > > need gasket that is for the intake manifold only. Even if the
existing
> > > > gasket was the one for the intake only, would I be better off going
to
> > the
> > > > gasket that covers both?
> > > > 3) I have the aluminum valve cover. Whats the best sealant to use on
the
> > > > cork gasket? Is it best to put the sealer on both sides? Thin coat
or
> > > > thick?
> > > >
> > > > Thanks
> > > > Joe in Maui HI
> > >
> > >
more when the engine is warm than when it is cold. The sound seems to occur
about four or five times per second when idling at 500 RPM, which makes it 1
sound per 2 rotations of the crank. So, more likely a valvetrain thing than
piston slap, right?
Can much harm come from ignoring it?
/Peter
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:4187B7D9.91ACFB04@sympatico.ca...
> It makes a tapping/clicking noise. A valve only opens once every second
> engine stroke so a valve tap is slower than say piston slap which
> happens every stroke. If you put a timing light on, the valve will tap
> every second flash.
>
> Some of those 4.0 engines do suffer from the occasional piston slap when
> cold. This won't hurt anything and cannot be repaired without a total
> engine job.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Peter Pontbriand wrote:
> >
> > What kind of noise does a "noisy lifter" make? I'm curious because my
'02 TJ
> > 4.0 has an intermittent "thunking" sound (with accompanying vibration)
at
> > idle. I've no idea what that could be, and because it doesn't
consistently
> > do it I haven't been able to take it to a shop.
> >
> > /Peter
> >
> > "Miguel Londono" <miguellondono@usa.net> wrote in message
> > news:41872bc1$1_1@news.cybersurf.net...
> > > I also have a 93 yj with the 4.0 with a noisy lifter, my question is:
will
> > > the lifters come out without removing the cylinder head? My factory
manual
> > > claims it can be done both ways, true??
> > >
> > >
> > >
> > > "Joe and Joann" <mauijoe@maui.net> wrote in message
> > > news:vBghd.33663$Kl3.418@twister.socal.rr.com...
> > > >I am getting ready to change a noisy lifter in my '90 YJ 4.2L. Three
> > > >questions:
> > > > 1) The Haynes manual says to use Perfect Seal sealing compound on
the
> > > > head gasket for the 4.2 L. I have an OEM replacement head gasket. I
> > > > thought I had read in this newsgroup that no sealer should be used
with
> > > > the head gasket. Any thoughts on this?
> > > > 2) From what I have been able to find, early 4.2s used a gasket that
> > > > covers both the intake and exhaust manifolds and later engines were
> > > > equipped with an intake manifold gasket only. Since I haven't gotten
> > > > things apart yet, I don't know what kind I have. If you use the full
> > > > length gasket that covers the intake and exhaust manifolds, do you
still
> > > > need gasket that is for the intake manifold only. Even if the
existing
> > > > gasket was the one for the intake only, would I be better off going
to
> > the
> > > > gasket that covers both?
> > > > 3) I have the aluminum valve cover. Whats the best sealant to use on
the
> > > > cork gasket? Is it best to put the sealer on both sides? Thin coat
or
> > > > thick?
> > > >
> > > > Thanks
> > > > Joe in Maui HI
> > >
> > >
#27
Guest
Posts: n/a
Re: Gasket Questions
Ok, thanks. It's not a 'when cold' thing though - if anything it happens
more when the engine is warm than when it is cold. The sound seems to occur
about four or five times per second when idling at 500 RPM, which makes it 1
sound per 2 rotations of the crank. So, more likely a valvetrain thing than
piston slap, right?
Can much harm come from ignoring it?
/Peter
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:4187B7D9.91ACFB04@sympatico.ca...
> It makes a tapping/clicking noise. A valve only opens once every second
> engine stroke so a valve tap is slower than say piston slap which
> happens every stroke. If you put a timing light on, the valve will tap
> every second flash.
>
> Some of those 4.0 engines do suffer from the occasional piston slap when
> cold. This won't hurt anything and cannot be repaired without a total
> engine job.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Peter Pontbriand wrote:
> >
> > What kind of noise does a "noisy lifter" make? I'm curious because my
'02 TJ
> > 4.0 has an intermittent "thunking" sound (with accompanying vibration)
at
> > idle. I've no idea what that could be, and because it doesn't
consistently
> > do it I haven't been able to take it to a shop.
> >
> > /Peter
> >
> > "Miguel Londono" <miguellondono@usa.net> wrote in message
> > news:41872bc1$1_1@news.cybersurf.net...
> > > I also have a 93 yj with the 4.0 with a noisy lifter, my question is:
will
> > > the lifters come out without removing the cylinder head? My factory
manual
> > > claims it can be done both ways, true??
> > >
> > >
> > >
> > > "Joe and Joann" <mauijoe@maui.net> wrote in message
> > > news:vBghd.33663$Kl3.418@twister.socal.rr.com...
> > > >I am getting ready to change a noisy lifter in my '90 YJ 4.2L. Three
> > > >questions:
> > > > 1) The Haynes manual says to use Perfect Seal sealing compound on
the
> > > > head gasket for the 4.2 L. I have an OEM replacement head gasket. I
> > > > thought I had read in this newsgroup that no sealer should be used
with
> > > > the head gasket. Any thoughts on this?
> > > > 2) From what I have been able to find, early 4.2s used a gasket that
> > > > covers both the intake and exhaust manifolds and later engines were
> > > > equipped with an intake manifold gasket only. Since I haven't gotten
> > > > things apart yet, I don't know what kind I have. If you use the full
> > > > length gasket that covers the intake and exhaust manifolds, do you
still
> > > > need gasket that is for the intake manifold only. Even if the
existing
> > > > gasket was the one for the intake only, would I be better off going
to
> > the
> > > > gasket that covers both?
> > > > 3) I have the aluminum valve cover. Whats the best sealant to use on
the
> > > > cork gasket? Is it best to put the sealer on both sides? Thin coat
or
> > > > thick?
> > > >
> > > > Thanks
> > > > Joe in Maui HI
> > >
> > >
more when the engine is warm than when it is cold. The sound seems to occur
about four or five times per second when idling at 500 RPM, which makes it 1
sound per 2 rotations of the crank. So, more likely a valvetrain thing than
piston slap, right?
Can much harm come from ignoring it?
/Peter
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:4187B7D9.91ACFB04@sympatico.ca...
> It makes a tapping/clicking noise. A valve only opens once every second
> engine stroke so a valve tap is slower than say piston slap which
> happens every stroke. If you put a timing light on, the valve will tap
> every second flash.
>
> Some of those 4.0 engines do suffer from the occasional piston slap when
> cold. This won't hurt anything and cannot be repaired without a total
> engine job.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Peter Pontbriand wrote:
> >
> > What kind of noise does a "noisy lifter" make? I'm curious because my
'02 TJ
> > 4.0 has an intermittent "thunking" sound (with accompanying vibration)
at
> > idle. I've no idea what that could be, and because it doesn't
consistently
> > do it I haven't been able to take it to a shop.
> >
> > /Peter
> >
> > "Miguel Londono" <miguellondono@usa.net> wrote in message
> > news:41872bc1$1_1@news.cybersurf.net...
> > > I also have a 93 yj with the 4.0 with a noisy lifter, my question is:
will
> > > the lifters come out without removing the cylinder head? My factory
manual
> > > claims it can be done both ways, true??
> > >
> > >
> > >
> > > "Joe and Joann" <mauijoe@maui.net> wrote in message
> > > news:vBghd.33663$Kl3.418@twister.socal.rr.com...
> > > >I am getting ready to change a noisy lifter in my '90 YJ 4.2L. Three
> > > >questions:
> > > > 1) The Haynes manual says to use Perfect Seal sealing compound on
the
> > > > head gasket for the 4.2 L. I have an OEM replacement head gasket. I
> > > > thought I had read in this newsgroup that no sealer should be used
with
> > > > the head gasket. Any thoughts on this?
> > > > 2) From what I have been able to find, early 4.2s used a gasket that
> > > > covers both the intake and exhaust manifolds and later engines were
> > > > equipped with an intake manifold gasket only. Since I haven't gotten
> > > > things apart yet, I don't know what kind I have. If you use the full
> > > > length gasket that covers the intake and exhaust manifolds, do you
still
> > > > need gasket that is for the intake manifold only. Even if the
existing
> > > > gasket was the one for the intake only, would I be better off going
to
> > the
> > > > gasket that covers both?
> > > > 3) I have the aluminum valve cover. Whats the best sealant to use on
the
> > > > cork gasket? Is it best to put the sealer on both sides? Thin coat
or
> > > > thick?
> > > >
> > > > Thanks
> > > > Joe in Maui HI
> > >
> > >
#28
Guest
Posts: n/a
Re: Gasket Questions
Ok, thanks. It's not a 'when cold' thing though - if anything it happens
more when the engine is warm than when it is cold. The sound seems to occur
about four or five times per second when idling at 500 RPM, which makes it 1
sound per 2 rotations of the crank. So, more likely a valvetrain thing than
piston slap, right?
Can much harm come from ignoring it?
/Peter
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:4187B7D9.91ACFB04@sympatico.ca...
> It makes a tapping/clicking noise. A valve only opens once every second
> engine stroke so a valve tap is slower than say piston slap which
> happens every stroke. If you put a timing light on, the valve will tap
> every second flash.
>
> Some of those 4.0 engines do suffer from the occasional piston slap when
> cold. This won't hurt anything and cannot be repaired without a total
> engine job.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Peter Pontbriand wrote:
> >
> > What kind of noise does a "noisy lifter" make? I'm curious because my
'02 TJ
> > 4.0 has an intermittent "thunking" sound (with accompanying vibration)
at
> > idle. I've no idea what that could be, and because it doesn't
consistently
> > do it I haven't been able to take it to a shop.
> >
> > /Peter
> >
> > "Miguel Londono" <miguellondono@usa.net> wrote in message
> > news:41872bc1$1_1@news.cybersurf.net...
> > > I also have a 93 yj with the 4.0 with a noisy lifter, my question is:
will
> > > the lifters come out without removing the cylinder head? My factory
manual
> > > claims it can be done both ways, true??
> > >
> > >
> > >
> > > "Joe and Joann" <mauijoe@maui.net> wrote in message
> > > news:vBghd.33663$Kl3.418@twister.socal.rr.com...
> > > >I am getting ready to change a noisy lifter in my '90 YJ 4.2L. Three
> > > >questions:
> > > > 1) The Haynes manual says to use Perfect Seal sealing compound on
the
> > > > head gasket for the 4.2 L. I have an OEM replacement head gasket. I
> > > > thought I had read in this newsgroup that no sealer should be used
with
> > > > the head gasket. Any thoughts on this?
> > > > 2) From what I have been able to find, early 4.2s used a gasket that
> > > > covers both the intake and exhaust manifolds and later engines were
> > > > equipped with an intake manifold gasket only. Since I haven't gotten
> > > > things apart yet, I don't know what kind I have. If you use the full
> > > > length gasket that covers the intake and exhaust manifolds, do you
still
> > > > need gasket that is for the intake manifold only. Even if the
existing
> > > > gasket was the one for the intake only, would I be better off going
to
> > the
> > > > gasket that covers both?
> > > > 3) I have the aluminum valve cover. Whats the best sealant to use on
the
> > > > cork gasket? Is it best to put the sealer on both sides? Thin coat
or
> > > > thick?
> > > >
> > > > Thanks
> > > > Joe in Maui HI
> > >
> > >
more when the engine is warm than when it is cold. The sound seems to occur
about four or five times per second when idling at 500 RPM, which makes it 1
sound per 2 rotations of the crank. So, more likely a valvetrain thing than
piston slap, right?
Can much harm come from ignoring it?
/Peter
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:4187B7D9.91ACFB04@sympatico.ca...
> It makes a tapping/clicking noise. A valve only opens once every second
> engine stroke so a valve tap is slower than say piston slap which
> happens every stroke. If you put a timing light on, the valve will tap
> every second flash.
>
> Some of those 4.0 engines do suffer from the occasional piston slap when
> cold. This won't hurt anything and cannot be repaired without a total
> engine job.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Peter Pontbriand wrote:
> >
> > What kind of noise does a "noisy lifter" make? I'm curious because my
'02 TJ
> > 4.0 has an intermittent "thunking" sound (with accompanying vibration)
at
> > idle. I've no idea what that could be, and because it doesn't
consistently
> > do it I haven't been able to take it to a shop.
> >
> > /Peter
> >
> > "Miguel Londono" <miguellondono@usa.net> wrote in message
> > news:41872bc1$1_1@news.cybersurf.net...
> > > I also have a 93 yj with the 4.0 with a noisy lifter, my question is:
will
> > > the lifters come out without removing the cylinder head? My factory
manual
> > > claims it can be done both ways, true??
> > >
> > >
> > >
> > > "Joe and Joann" <mauijoe@maui.net> wrote in message
> > > news:vBghd.33663$Kl3.418@twister.socal.rr.com...
> > > >I am getting ready to change a noisy lifter in my '90 YJ 4.2L. Three
> > > >questions:
> > > > 1) The Haynes manual says to use Perfect Seal sealing compound on
the
> > > > head gasket for the 4.2 L. I have an OEM replacement head gasket. I
> > > > thought I had read in this newsgroup that no sealer should be used
with
> > > > the head gasket. Any thoughts on this?
> > > > 2) From what I have been able to find, early 4.2s used a gasket that
> > > > covers both the intake and exhaust manifolds and later engines were
> > > > equipped with an intake manifold gasket only. Since I haven't gotten
> > > > things apart yet, I don't know what kind I have. If you use the full
> > > > length gasket that covers the intake and exhaust manifolds, do you
still
> > > > need gasket that is for the intake manifold only. Even if the
existing
> > > > gasket was the one for the intake only, would I be better off going
to
> > the
> > > > gasket that covers both?
> > > > 3) I have the aluminum valve cover. Whats the best sealant to use on
the
> > > > cork gasket? Is it best to put the sealer on both sides? Thin coat
or
> > > > thick?
> > > >
> > > > Thanks
> > > > Joe in Maui HI
> > >
> > >
#29
Guest
Posts: n/a
Re: Gasket Questions
A noisy valve normally won't hurt anything. If it gets worse, it needs
attention.
Mike
Peter Pontbriand wrote:
>
> Ok, thanks. It's not a 'when cold' thing though - if anything it happens
> more when the engine is warm than when it is cold. The sound seems to occur
> about four or five times per second when idling at 500 RPM, which makes it 1
> sound per 2 rotations of the crank. So, more likely a valvetrain thing than
> piston slap, right?
>
> Can much harm come from ignoring it?
>
> /Peter
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:4187B7D9.91ACFB04@sympatico.ca...
> > It makes a tapping/clicking noise. A valve only opens once every second
> > engine stroke so a valve tap is slower than say piston slap which
> > happens every stroke. If you put a timing light on, the valve will tap
> > every second flash.
> >
> > Some of those 4.0 engines do suffer from the occasional piston slap when
> > cold. This won't hurt anything and cannot be repaired without a total
> > engine job.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > Peter Pontbriand wrote:
> > >
> > > What kind of noise does a "noisy lifter" make? I'm curious because my
> '02 TJ
> > > 4.0 has an intermittent "thunking" sound (with accompanying vibration)
> at
> > > idle. I've no idea what that could be, and because it doesn't
> consistently
> > > do it I haven't been able to take it to a shop.
> > >
> > > /Peter
> > >
> > > "Miguel Londono" <miguellondono@usa.net> wrote in message
> > > news:41872bc1$1_1@news.cybersurf.net...
> > > > I also have a 93 yj with the 4.0 with a noisy lifter, my question is:
> will
> > > > the lifters come out without removing the cylinder head? My factory
> manual
> > > > claims it can be done both ways, true??
> > > >
> > > >
> > > >
> > > > "Joe and Joann" <mauijoe@maui.net> wrote in message
> > > > news:vBghd.33663$Kl3.418@twister.socal.rr.com...
> > > > >I am getting ready to change a noisy lifter in my '90 YJ 4.2L. Three
> > > > >questions:
> > > > > 1) The Haynes manual says to use Perfect Seal sealing compound on
> the
> > > > > head gasket for the 4.2 L. I have an OEM replacement head gasket. I
> > > > > thought I had read in this newsgroup that no sealer should be used
> with
> > > > > the head gasket. Any thoughts on this?
> > > > > 2) From what I have been able to find, early 4.2s used a gasket that
> > > > > covers both the intake and exhaust manifolds and later engines were
> > > > > equipped with an intake manifold gasket only. Since I haven't gotten
> > > > > things apart yet, I don't know what kind I have. If you use the full
> > > > > length gasket that covers the intake and exhaust manifolds, do you
> still
> > > > > need gasket that is for the intake manifold only. Even if the
> existing
> > > > > gasket was the one for the intake only, would I be better off going
> to
> > > the
> > > > > gasket that covers both?
> > > > > 3) I have the aluminum valve cover. Whats the best sealant to use on
> the
> > > > > cork gasket? Is it best to put the sealer on both sides? Thin coat
> or
> > > > > thick?
> > > > >
> > > > > Thanks
> > > > > Joe in Maui HI
> > > >
> > > >
attention.
Mike
Peter Pontbriand wrote:
>
> Ok, thanks. It's not a 'when cold' thing though - if anything it happens
> more when the engine is warm than when it is cold. The sound seems to occur
> about four or five times per second when idling at 500 RPM, which makes it 1
> sound per 2 rotations of the crank. So, more likely a valvetrain thing than
> piston slap, right?
>
> Can much harm come from ignoring it?
>
> /Peter
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:4187B7D9.91ACFB04@sympatico.ca...
> > It makes a tapping/clicking noise. A valve only opens once every second
> > engine stroke so a valve tap is slower than say piston slap which
> > happens every stroke. If you put a timing light on, the valve will tap
> > every second flash.
> >
> > Some of those 4.0 engines do suffer from the occasional piston slap when
> > cold. This won't hurt anything and cannot be repaired without a total
> > engine job.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > Peter Pontbriand wrote:
> > >
> > > What kind of noise does a "noisy lifter" make? I'm curious because my
> '02 TJ
> > > 4.0 has an intermittent "thunking" sound (with accompanying vibration)
> at
> > > idle. I've no idea what that could be, and because it doesn't
> consistently
> > > do it I haven't been able to take it to a shop.
> > >
> > > /Peter
> > >
> > > "Miguel Londono" <miguellondono@usa.net> wrote in message
> > > news:41872bc1$1_1@news.cybersurf.net...
> > > > I also have a 93 yj with the 4.0 with a noisy lifter, my question is:
> will
> > > > the lifters come out without removing the cylinder head? My factory
> manual
> > > > claims it can be done both ways, true??
> > > >
> > > >
> > > >
> > > > "Joe and Joann" <mauijoe@maui.net> wrote in message
> > > > news:vBghd.33663$Kl3.418@twister.socal.rr.com...
> > > > >I am getting ready to change a noisy lifter in my '90 YJ 4.2L. Three
> > > > >questions:
> > > > > 1) The Haynes manual says to use Perfect Seal sealing compound on
> the
> > > > > head gasket for the 4.2 L. I have an OEM replacement head gasket. I
> > > > > thought I had read in this newsgroup that no sealer should be used
> with
> > > > > the head gasket. Any thoughts on this?
> > > > > 2) From what I have been able to find, early 4.2s used a gasket that
> > > > > covers both the intake and exhaust manifolds and later engines were
> > > > > equipped with an intake manifold gasket only. Since I haven't gotten
> > > > > things apart yet, I don't know what kind I have. If you use the full
> > > > > length gasket that covers the intake and exhaust manifolds, do you
> still
> > > > > need gasket that is for the intake manifold only. Even if the
> existing
> > > > > gasket was the one for the intake only, would I be better off going
> to
> > > the
> > > > > gasket that covers both?
> > > > > 3) I have the aluminum valve cover. Whats the best sealant to use on
> the
> > > > > cork gasket? Is it best to put the sealer on both sides? Thin coat
> or
> > > > > thick?
> > > > >
> > > > > Thanks
> > > > > Joe in Maui HI
> > > >
> > > >
#30
Guest
Posts: n/a
Re: Gasket Questions
A noisy valve normally won't hurt anything. If it gets worse, it needs
attention.
Mike
Peter Pontbriand wrote:
>
> Ok, thanks. It's not a 'when cold' thing though - if anything it happens
> more when the engine is warm than when it is cold. The sound seems to occur
> about four or five times per second when idling at 500 RPM, which makes it 1
> sound per 2 rotations of the crank. So, more likely a valvetrain thing than
> piston slap, right?
>
> Can much harm come from ignoring it?
>
> /Peter
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:4187B7D9.91ACFB04@sympatico.ca...
> > It makes a tapping/clicking noise. A valve only opens once every second
> > engine stroke so a valve tap is slower than say piston slap which
> > happens every stroke. If you put a timing light on, the valve will tap
> > every second flash.
> >
> > Some of those 4.0 engines do suffer from the occasional piston slap when
> > cold. This won't hurt anything and cannot be repaired without a total
> > engine job.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > Peter Pontbriand wrote:
> > >
> > > What kind of noise does a "noisy lifter" make? I'm curious because my
> '02 TJ
> > > 4.0 has an intermittent "thunking" sound (with accompanying vibration)
> at
> > > idle. I've no idea what that could be, and because it doesn't
> consistently
> > > do it I haven't been able to take it to a shop.
> > >
> > > /Peter
> > >
> > > "Miguel Londono" <miguellondono@usa.net> wrote in message
> > > news:41872bc1$1_1@news.cybersurf.net...
> > > > I also have a 93 yj with the 4.0 with a noisy lifter, my question is:
> will
> > > > the lifters come out without removing the cylinder head? My factory
> manual
> > > > claims it can be done both ways, true??
> > > >
> > > >
> > > >
> > > > "Joe and Joann" <mauijoe@maui.net> wrote in message
> > > > news:vBghd.33663$Kl3.418@twister.socal.rr.com...
> > > > >I am getting ready to change a noisy lifter in my '90 YJ 4.2L. Three
> > > > >questions:
> > > > > 1) The Haynes manual says to use Perfect Seal sealing compound on
> the
> > > > > head gasket for the 4.2 L. I have an OEM replacement head gasket. I
> > > > > thought I had read in this newsgroup that no sealer should be used
> with
> > > > > the head gasket. Any thoughts on this?
> > > > > 2) From what I have been able to find, early 4.2s used a gasket that
> > > > > covers both the intake and exhaust manifolds and later engines were
> > > > > equipped with an intake manifold gasket only. Since I haven't gotten
> > > > > things apart yet, I don't know what kind I have. If you use the full
> > > > > length gasket that covers the intake and exhaust manifolds, do you
> still
> > > > > need gasket that is for the intake manifold only. Even if the
> existing
> > > > > gasket was the one for the intake only, would I be better off going
> to
> > > the
> > > > > gasket that covers both?
> > > > > 3) I have the aluminum valve cover. Whats the best sealant to use on
> the
> > > > > cork gasket? Is it best to put the sealer on both sides? Thin coat
> or
> > > > > thick?
> > > > >
> > > > > Thanks
> > > > > Joe in Maui HI
> > > >
> > > >
attention.
Mike
Peter Pontbriand wrote:
>
> Ok, thanks. It's not a 'when cold' thing though - if anything it happens
> more when the engine is warm than when it is cold. The sound seems to occur
> about four or five times per second when idling at 500 RPM, which makes it 1
> sound per 2 rotations of the crank. So, more likely a valvetrain thing than
> piston slap, right?
>
> Can much harm come from ignoring it?
>
> /Peter
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:4187B7D9.91ACFB04@sympatico.ca...
> > It makes a tapping/clicking noise. A valve only opens once every second
> > engine stroke so a valve tap is slower than say piston slap which
> > happens every stroke. If you put a timing light on, the valve will tap
> > every second flash.
> >
> > Some of those 4.0 engines do suffer from the occasional piston slap when
> > cold. This won't hurt anything and cannot be repaired without a total
> > engine job.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > Peter Pontbriand wrote:
> > >
> > > What kind of noise does a "noisy lifter" make? I'm curious because my
> '02 TJ
> > > 4.0 has an intermittent "thunking" sound (with accompanying vibration)
> at
> > > idle. I've no idea what that could be, and because it doesn't
> consistently
> > > do it I haven't been able to take it to a shop.
> > >
> > > /Peter
> > >
> > > "Miguel Londono" <miguellondono@usa.net> wrote in message
> > > news:41872bc1$1_1@news.cybersurf.net...
> > > > I also have a 93 yj with the 4.0 with a noisy lifter, my question is:
> will
> > > > the lifters come out without removing the cylinder head? My factory
> manual
> > > > claims it can be done both ways, true??
> > > >
> > > >
> > > >
> > > > "Joe and Joann" <mauijoe@maui.net> wrote in message
> > > > news:vBghd.33663$Kl3.418@twister.socal.rr.com...
> > > > >I am getting ready to change a noisy lifter in my '90 YJ 4.2L. Three
> > > > >questions:
> > > > > 1) The Haynes manual says to use Perfect Seal sealing compound on
> the
> > > > > head gasket for the 4.2 L. I have an OEM replacement head gasket. I
> > > > > thought I had read in this newsgroup that no sealer should be used
> with
> > > > > the head gasket. Any thoughts on this?
> > > > > 2) From what I have been able to find, early 4.2s used a gasket that
> > > > > covers both the intake and exhaust manifolds and later engines were
> > > > > equipped with an intake manifold gasket only. Since I haven't gotten
> > > > > things apart yet, I don't know what kind I have. If you use the full
> > > > > length gasket that covers the intake and exhaust manifolds, do you
> still
> > > > > need gasket that is for the intake manifold only. Even if the
> existing
> > > > > gasket was the one for the intake only, would I be better off going
> to
> > > the
> > > > > gasket that covers both?
> > > > > 3) I have the aluminum valve cover. Whats the best sealant to use on
> the
> > > > > cork gasket? Is it best to put the sealer on both sides? Thin coat
> or
> > > > > thick?
> > > > >
> > > > > Thanks
> > > > > Joe in Maui HI
> > > >
> > > >