Dave Milne

wot he said. Is there any steam coming out of the exhaust ?
As another thought, have you ruled out the water pump leaking ? That would
be my first port of call.

Dave Milne, Scotland

"GK" <nospam@nospam.com> wrote in message
news:uPzQb.10796$6o4.6637@fe2.texas.rr.com...
> Are you sure the new head is definitely cracked this time, or could it be
> just a bad head gasket? Just a thought. A bad head gasket would be more
> likely to allow the loss of coolant from the water jacket into the
> combustion chamber(s) or outside the engine more likely than a cracked
head
> would. At least it's where I would start looking first after inspecting
all
> other cooling system components. Just my $.02 .
>
> Regards,

Dave Milne

wot he said. Is there any steam coming out of the exhaust ?
As another thought, have you ruled out the water pump leaking ? That would
be my first port of call.

Dave Milne, Scotland

"GK" <nospam@nospam.com> wrote in message
news:uPzQb.10796$6o4.6637@fe2.texas.rr.com...
> Are you sure the new head is definitely cracked this time, or could it be
> just a bad head gasket? Just a thought. A bad head gasket would be more
> likely to allow the loss of coolant from the water jacket into the
> combustion chamber(s) or outside the engine more likely than a cracked
head
> would. At least it's where I would start looking first after inspecting
all
> other cooling system components. Just my $.02 .
>
> Regards,

Dave Milne

wot he said. Is there any steam coming out of the exhaust ?
As another thought, have you ruled out the water pump leaking ? That would
be my first port of call.

Dave Milne, Scotland

"GK" <nospam@nospam.com> wrote in message
news:uPzQb.10796$6o4.6637@fe2.texas.rr.com...
> Are you sure the new head is definitely cracked this time, or could it be
> just a bad head gasket? Just a thought. A bad head gasket would be more
> likely to allow the loss of coolant from the water jacket into the
> combustion chamber(s) or outside the engine more likely than a cracked
head
> would. At least it's where I would start looking first after inspecting
all
> other cooling system components. Just my $.02 .
>
> Regards,

John Stio

Thanks Guys,

I will look into these things.
Just to answer your questions, I have seen no external leaks, all looks
clean.

From the last time, it has never overheated.

THanks for all ur input. Hopefully it turns out to be something minor.

"Dave Milne" <jeep@_nospam_milne.info> wrote in message
news:TQzQb.8654$oM.94638298@news-text.cableinet.net...
> If your first one failed from overheating you may also have warped the
> block, causing gasket failure on your second one,which is losing the
coolant
> and may have cracked/warped the cylinder head. (I'm assuming you know that
> the best way to crack a cylinder head is to pour cold water into the hot
> engine when you notice that the coolant is low, but I thought I'd mention
it
> just for completeness :-)).
>
> Dave Milne, Scotland
>
>
> "Matt Osborn" <msosborn@spam_trap@attglobal.net> wrote in message
> news:q5e510l9111jfrbtnq59v1ho3rui9dr8oe@4ax.com...
> > On Sat, 24 Jan 2004 15:28:16 GMT, "John Stio" <jstio@optonline.net>
> > wrote:
> >
> > >I have an 02 TJ, at around 24,000 miles i noticed coolant missing.
after
> > >many visits to the dealer and local mechanics, it turns out the head
was
> > >cracked. The head was replaced at 30,000 miles this past July.
> > >
> > >The jeep now has 40,000 miles and two weeks ago, i noticed the coolant
> level
> > >dropping yet again.
> > >
> > >Does anyone know what the flaw is, and why these heads crack so
> easily????
> >
> > Never heard of it.
>
>

John Stio

Thanks Guys,

I will look into these things.
Just to answer your questions, I have seen no external leaks, all looks
clean.

From the last time, it has never overheated.

THanks for all ur input. Hopefully it turns out to be something minor.

"Dave Milne" <jeep@_nospam_milne.info> wrote in message
news:TQzQb.8654$oM.94638298@news-text.cableinet.net...
> If your first one failed from overheating you may also have warped the
> block, causing gasket failure on your second one,which is losing the
coolant
> and may have cracked/warped the cylinder head. (I'm assuming you know that
> the best way to crack a cylinder head is to pour cold water into the hot
> engine when you notice that the coolant is low, but I thought I'd mention
it
> just for completeness :-)).
>
> Dave Milne, Scotland
>
>
> "Matt Osborn" <msosborn@spam_trap@attglobal.net> wrote in message
> news:q5e510l9111jfrbtnq59v1ho3rui9dr8oe@4ax.com...
> > On Sat, 24 Jan 2004 15:28:16 GMT, "John Stio" <jstio@optonline.net>
> > wrote:
> >
> > >I have an 02 TJ, at around 24,000 miles i noticed coolant missing.
after
> > >many visits to the dealer and local mechanics, it turns out the head
was
> > >cracked. The head was replaced at 30,000 miles this past July.
> > >
> > >The jeep now has 40,000 miles and two weeks ago, i noticed the coolant
> level
> > >dropping yet again.
> > >
> > >Does anyone know what the flaw is, and why these heads crack so
> easily????
> >
> > Never heard of it.
>
>

John Stio

Thanks Guys,

I will look into these things.
Just to answer your questions, I have seen no external leaks, all looks
clean.

From the last time, it has never overheated.

THanks for all ur input. Hopefully it turns out to be something minor.

"Dave Milne" <jeep@_nospam_milne.info> wrote in message
news:TQzQb.8654$oM.94638298@news-text.cableinet.net...
> If your first one failed from overheating you may also have warped the
> block, causing gasket failure on your second one,which is losing the
coolant
> and may have cracked/warped the cylinder head. (I'm assuming you know that
> the best way to crack a cylinder head is to pour cold water into the hot
> engine when you notice that the coolant is low, but I thought I'd mention
it
> just for completeness :-)).
>
> Dave Milne, Scotland
>
>
> "Matt Osborn" <msosborn@spam_trap@attglobal.net> wrote in message
> news:q5e510l9111jfrbtnq59v1ho3rui9dr8oe@4ax.com...
> > On Sat, 24 Jan 2004 15:28:16 GMT, "John Stio" <jstio@optonline.net>
> > wrote:
> >
> > >I have an 02 TJ, at around 24,000 miles i noticed coolant missing.
after
> > >many visits to the dealer and local mechanics, it turns out the head
was
> > >cracked. The head was replaced at 30,000 miles this past July.
> > >
> > >The jeep now has 40,000 miles and two weeks ago, i noticed the coolant
> level
> > >dropping yet again.
> > >
> > >Does anyone know what the flaw is, and why these heads crack so
> easily????
> >
> > Never heard of it.
>
>

Dave Milne

Any mayo in the oil, John ?

Dave Milne, Scotland

"John Stio" <jstio@optonline.net> wrote in message
news:zBAQb.14055$O22.8725076@news4.srv.hcvlny.cv.n et...
> Thanks Guys,
>
> I will look into these things.
> Just to answer your questions, I have seen no external leaks, all looks
> clean.
>
> From the last time, it has never overheated.
>
> THanks for all ur input. Hopefully it turns out to be something minor.
>
> "Dave Milne" <jeep@_nospam_milne.info> wrote in message
> news:TQzQb.8654$oM.94638298@news-text.cableinet.net...
> > If your first one failed from overheating you may also have warped the
> > block, causing gasket failure on your second one,which is losing the
> coolant
> > and may have cracked/warped the cylinder head. (I'm assuming you know
that
> > the best way to crack a cylinder head is to pour cold water into the hot
> > engine when you notice that the coolant is low, but I thought I'd
mention
> it
> > just for completeness :-)).
> >
> > Dave Milne, Scotland
> >
> >
> > "Matt Osborn" <msosborn@spam_trap@attglobal.net> wrote in message
> > news:q5e510l9111jfrbtnq59v1ho3rui9dr8oe@4ax.com...
> > > On Sat, 24 Jan 2004 15:28:16 GMT, "John Stio" <jstio@optonline.net>
> > > wrote:
> > >
> > > >I have an 02 TJ, at around 24,000 miles i noticed coolant missing.
> after
> > > >many visits to the dealer and local mechanics, it turns out the head
> was
> > > >cracked. The head was replaced at 30,000 miles this past July.
> > > >
> > > >The jeep now has 40,000 miles and two weeks ago, i noticed the
coolant
> > level
> > > >dropping yet again.
> > > >
> > > >Does anyone know what the flaw is, and why these heads crack so
> > easily????
> > >
> > > Never heard of it.
> >
> >
>
>

Dave Milne

Any mayo in the oil, John ?

Dave Milne, Scotland

"John Stio" <jstio@optonline.net> wrote in message
news:zBAQb.14055$O22.8725076@news4.srv.hcvlny.cv.n et...
> Thanks Guys,
>
> I will look into these things.
> Just to answer your questions, I have seen no external leaks, all looks
> clean.
>
> From the last time, it has never overheated.
>
> THanks for all ur input. Hopefully it turns out to be something minor.
>
> "Dave Milne" <jeep@_nospam_milne.info> wrote in message
> news:TQzQb.8654$oM.94638298@news-text.cableinet.net...
> > If your first one failed from overheating you may also have warped the
> > block, causing gasket failure on your second one,which is losing the
> coolant
> > and may have cracked/warped the cylinder head. (I'm assuming you know
that
> > the best way to crack a cylinder head is to pour cold water into the hot
> > engine when you notice that the coolant is low, but I thought I'd
mention
> it
> > just for completeness :-)).
> >
> > Dave Milne, Scotland
> >
> >
> > "Matt Osborn" <msosborn@spam_trap@attglobal.net> wrote in message
> > news:q5e510l9111jfrbtnq59v1ho3rui9dr8oe@4ax.com...
> > > On Sat, 24 Jan 2004 15:28:16 GMT, "John Stio" <jstio@optonline.net>
> > > wrote:
> > >
> > > >I have an 02 TJ, at around 24,000 miles i noticed coolant missing.
> after
> > > >many visits to the dealer and local mechanics, it turns out the head
> was
> > > >cracked. The head was replaced at 30,000 miles this past July.
> > > >
> > > >The jeep now has 40,000 miles and two weeks ago, i noticed the
coolant
> > level
> > > >dropping yet again.
> > > >
> > > >Does anyone know what the flaw is, and why these heads crack so
> > easily????
> > >
> > > Never heard of it.
> >
> >
>
>

Dave Milne

Any mayo in the oil, John ?

Dave Milne, Scotland

"John Stio" <jstio@optonline.net> wrote in message
news:zBAQb.14055$O22.8725076@news4.srv.hcvlny.cv.n et...
> Thanks Guys,
>
> I will look into these things.
> Just to answer your questions, I have seen no external leaks, all looks
> clean.
>
> From the last time, it has never overheated.
>
> THanks for all ur input. Hopefully it turns out to be something minor.
>
> "Dave Milne" <jeep@_nospam_milne.info> wrote in message
> news:TQzQb.8654$oM.94638298@news-text.cableinet.net...
> > If your first one failed from overheating you may also have warped the
> > block, causing gasket failure on your second one,which is losing the
> coolant
> > and may have cracked/warped the cylinder head. (I'm assuming you know
that
> > the best way to crack a cylinder head is to pour cold water into the hot
> > engine when you notice that the coolant is low, but I thought I'd
mention
> it
> > just for completeness :-)).
> >
> > Dave Milne, Scotland
> >
> >
> > "Matt Osborn" <msosborn@spam_trap@attglobal.net> wrote in message
> > news:q5e510l9111jfrbtnq59v1ho3rui9dr8oe@4ax.com...
> > > On Sat, 24 Jan 2004 15:28:16 GMT, "John Stio" <jstio@optonline.net>
> > > wrote:
> > >
> > > >I have an 02 TJ, at around 24,000 miles i noticed coolant missing.
> after
> > > >many visits to the dealer and local mechanics, it turns out the head
> was
> > > >cracked. The head was replaced at 30,000 miles this past July.
> > > >
> > > >The jeep now has 40,000 miles and two weeks ago, i noticed the
coolant
> > level
> > > >dropping yet again.
> > > >
> > > >Does anyone know what the flaw is, and why these heads crack so
> > easily????
> > >
> > > Never heard of it.
> >
> >
>
>

John Stio

My local mechanic told me that this is a common problem in the Jeep 4.0.
That he has seen it and repaired it many times.

After having the head replaced, and obviousely the head gasket, it had been
fine, coolant level stayed normal.

There are no signs of coolant in the oil, or leaking externally. The other
odd thing is, it does not blow excessive smoke. On a pressure test, the
cooling system will hold pressure just fine.

According to my Mechanic, the crack in the head causes the coolant to leak
into the cylinder after the vehicle is turned off. Basically i lose about an
Overflows worth of coolant over a month or so.

I love my jeep, but i am getting fed up. in 2 1/2 years and 40,000 miles, i
should not be going on my third head.

"Dave Milne" <jeep@_nospam_milne.info> wrote in message
news:WJAQb.8689$0c1.94998774@news-text.cableinet.net...
> Any mayo in the oil, John ?
>
> Dave Milne, Scotland
>
> "John Stio" <jstio@optonline.net> wrote in message
> news:zBAQb.14055$O22.8725076@news4.srv.hcvlny.cv.n et...
> > Thanks Guys,
> >
> > I will look into these things.
> > Just to answer your questions, I have seen no external leaks, all looks
> > clean.
> >
> > From the last time, it has never overheated.
> >
> > THanks for all ur input. Hopefully it turns out to be something minor.
> >
> > "Dave Milne" <jeep@_nospam_milne.info> wrote in message
> > news:TQzQb.8654$oM.94638298@news-text.cableinet.net...
> > > If your first one failed from overheating you may also have warped the
> > > block, causing gasket failure on your second one,which is losing the
> > coolant
> > > and may have cracked/warped the cylinder head. (I'm assuming you know
> that
> > > the best way to crack a cylinder head is to pour cold water into the
hot
> > > engine when you notice that the coolant is low, but I thought I'd
> mention
> > it
> > > just for completeness :-)).
> > >
> > > Dave Milne, Scotland
> > >
> > >
> > > "Matt Osborn" <msosborn@spam_trap@attglobal.net> wrote in message
> > > news:q5e510l9111jfrbtnq59v1ho3rui9dr8oe@4ax.com...
> > > > On Sat, 24 Jan 2004 15:28:16 GMT, "John Stio" <jstio@optonline.net>
> > > > wrote:
> > > >
> > > > >I have an 02 TJ, at around 24,000 miles i noticed coolant missing.
> > after
> > > > >many visits to the dealer and local mechanics, it turns out the
head
> > was
> > > > >cracked. The head was replaced at 30,000 miles this past July.
> > > > >
> > > > >The jeep now has 40,000 miles and two weeks ago, i noticed the
> coolant
> > > level
> > > > >dropping yet again.
> > > > >
> > > > >Does anyone know what the flaw is, and why these heads crack so
> > > easily????
> > > >
> > > > Never heard of it.
> > >
> > >
> >
> >
>
>