Mike Romain

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
> > > >
> > > >

twaldron

Some years of the 6cyls have what I describe as a diesel sound. It's
just their nature and nothing to worry about. I had a 95 XJ that sounded
that way, almost like a knock. Is that what it sounds like?

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
>>>>
>>>>
>
>

--
__________________________________________________ _________
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)
__________________________________________________ _________

twaldron

Some years of the 6cyls have what I describe as a diesel sound. It's
just their nature and nothing to worry about. I had a 95 XJ that sounded
that way, almost like a knock. Is that what it sounds like?

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
>>>>
>>>>
>
>

--
__________________________________________________ _________
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)
__________________________________________________ _________

twaldron

Some years of the 6cyls have what I describe as a diesel sound. It's
just their nature and nothing to worry about. I had a 95 XJ that sounded
that way, almost like a knock. Is that what it sounds like?

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
>>>>
>>>>
>
>

--
__________________________________________________ _________
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

Yes, "knock" is a pretty good description of the sound. I can feel it in the
pedals too, not just hear it. This is not the NV3550 tranny noise by the
way, this definitely comes from the engine.

/Peter

"twaldron" <thomas@OBVIOUSrubicons.com> wrote in message
news:diPhd.4409$fC4.3922@newssvr11.news.prodigy.co m...
> Some years of the 6cyls have what I describe as a diesel sound. It's
> just their nature and nothing to worry about. I had a 95 XJ that sounded
> that way, almost like a knock. Is that what it sounds like?
>
> 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
> >>>>
> >>>>
> >
> >
>
> --
> __________________________________________________ _________
> 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

Yes, "knock" is a pretty good description of the sound. I can feel it in the
pedals too, not just hear it. This is not the NV3550 tranny noise by the
way, this definitely comes from the engine.

/Peter

"twaldron" <thomas@OBVIOUSrubicons.com> wrote in message
news:diPhd.4409$fC4.3922@newssvr11.news.prodigy.co m...
> Some years of the 6cyls have what I describe as a diesel sound. It's
> just their nature and nothing to worry about. I had a 95 XJ that sounded
> that way, almost like a knock. Is that what it sounds like?
>
> 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
> >>>>
> >>>>
> >
> >
>
> --
> __________________________________________________ _________
> 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

Yes, "knock" is a pretty good description of the sound. I can feel it in the
pedals too, not just hear it. This is not the NV3550 tranny noise by the
way, this definitely comes from the engine.

/Peter

"twaldron" <thomas@OBVIOUSrubicons.com> wrote in message
news:diPhd.4409$fC4.3922@newssvr11.news.prodigy.co m...
> Some years of the 6cyls have what I describe as a diesel sound. It's
> just their nature and nothing to worry about. I had a 95 XJ that sounded
> that way, almost like a knock. Is that what it sounds like?
>
> 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
> >>>>
> >>>>
> >
> >
>
> --
> __________________________________________________ _________
> 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)
> __________________________________________________ _________

twaldron

Ok. I don't remember feeling it in the pedals, but it made the XJ sound
a bit like a diesel. Feeling a knock in the pedals is kind of alarming.
What did you say you drive and what is the mileage of the engine?

Peter Pontbriand wrote:

> Yes, "knock" is a pretty good description of the sound. I can feel it in the
> pedals too, not just hear it. This is not the NV3550 tranny noise by the
> way, this definitely comes from the engine.
>
> /Peter
>
> "twaldron" <thomas@OBVIOUSrubicons.com> wrote in message
> news:diPhd.4409$fC4.3922@newssvr11.news.prodigy.co m...
>
>>Some years of the 6cyls have what I describe as a diesel sound. It's
>>just their nature and nothing to worry about. I had a 95 XJ that sounded
>>that way, almost like a knock. Is that what it sounds like?
>>
>>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.co m...
>>>>>>
>>>>>>
>>>>>>>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)
>>________________________________________________ ___________
>
>
>

--
__________________________________________________ _________
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)
__________________________________________________ _________

twaldron

Ok. I don't remember feeling it in the pedals, but it made the XJ sound
a bit like a diesel. Feeling a knock in the pedals is kind of alarming.
What did you say you drive and what is the mileage of the engine?

Peter Pontbriand wrote:

> Yes, "knock" is a pretty good description of the sound. I can feel it in the
> pedals too, not just hear it. This is not the NV3550 tranny noise by the
> way, this definitely comes from the engine.
>
> /Peter
>
> "twaldron" <thomas@OBVIOUSrubicons.com> wrote in message
> news:diPhd.4409$fC4.3922@newssvr11.news.prodigy.co m...
>
>>Some years of the 6cyls have what I describe as a diesel sound. It's
>>just their nature and nothing to worry about. I had a 95 XJ that sounded
>>that way, almost like a knock. Is that what it sounds like?
>>
>>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.co m...
>>>>>>
>>>>>>
>>>>>>>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)
>>________________________________________________ ___________
>
>
>

--
__________________________________________________ _________
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)
__________________________________________________ _________

twaldron

Ok. I don't remember feeling it in the pedals, but it made the XJ sound
a bit like a diesel. Feeling a knock in the pedals is kind of alarming.
What did you say you drive and what is the mileage of the engine?

Peter Pontbriand wrote:

> Yes, "knock" is a pretty good description of the sound. I can feel it in the
> pedals too, not just hear it. This is not the NV3550 tranny noise by the
> way, this definitely comes from the engine.
>
> /Peter
>
> "twaldron" <thomas@OBVIOUSrubicons.com> wrote in message
> news:diPhd.4409$fC4.3922@newssvr11.news.prodigy.co m...
>
>>Some years of the 6cyls have what I describe as a diesel sound. It's
>>just their nature and nothing to worry about. I had a 95 XJ that sounded
>>that way, almost like a knock. Is that what it sounds like?
>>
>>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.co m...
>>>>>>
>>>>>>
>>>>>>>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)
>>________________________________________________ ___________
>
>
>

--
__________________________________________________ _________
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)
__________________________________________________ _________