I use Rotella. It seems to not make the noise until it is warmed up. It
seems louder at idle, but with the loudness of the engine anyway it hard to
tell, but I've noticed that if I coast to a stop it goes away until I get to
1000 rpm or lower. The noise doesn't get louder when I step on the gas, just
faster.
I am fearing the worst

"FullSizeJeep" <FullSizeJeep@gmail.com> wrote in message
news:1136413211.627365.173200@g49g2000cwa.googlegr oups.com...
> If the sound diminshes as the vehicle warms up, I can almost guarantee
> that it is a noisy lifter. What kind of oil are you running?
>

 

I use Rotella. It seems to not make the noise until it is warmed up. It
seems louder at idle, but with the loudness of the engine anyway it hard to
tell, but I've noticed that if I coast to a stop it goes away until I get to
1000 rpm or lower. The noise doesn't get louder when I step on the gas, just
faster.
I am fearing the worst

"FullSizeJeep" <FullSizeJeep@gmail.com> wrote in message
news:1136413211.627365.173200@g49g2000cwa.googlegr oups.com...
> If the sound diminshes as the vehicle warms up, I can almost guarantee
> that it is a noisy lifter. What kind of oil are you running?
>

 

I use Rotella. It seems to not make the noise until it is warmed up. It
seems louder at idle, but with the loudness of the engine anyway it hard to
tell, but I've noticed that if I coast to a stop it goes away until I get to
1000 rpm or lower. The noise doesn't get louder when I step on the gas, just
faster.
I am fearing the worst

"FullSizeJeep" <FullSizeJeep@gmail.com> wrote in message
news:1136413211.627365.173200@g49g2000cwa.googlegr oups.com...
> If the sound diminshes as the vehicle warms up, I can almost guarantee
> that it is a noisy lifter. What kind of oil are you running?
>

 

Robert Brown wrote:
> I use Rotella. It seems to not make the noise until it is warmed up. It
> seems louder at idle, but with the loudness of the engine anyway it hard to
> tell, but I've noticed that if I coast to a stop it goes away until I get to
> 1000 rpm or lower. The noise doesn't get louder when I step on the gas, just
> faster.
> I am fearing the worst
>
> "FullSizeJeep" <FullSizeJeep@gmail.com> wrote in message
> news:1136413211.627365.173200@g49g2000cwa.googlegr oups.com...
>
>>If the sound diminshes as the vehicle warms up, I can almost guarantee
>>that it is a noisy lifter. What kind of oil are you running?

Sounds like the notorious cracked 4.0 header.... doesn't "make the noise
until warmed up" is a pretty good indicator of an exhaust leak IMHO.
That 4.0 and the 4.2 before it are well known for leaking gaskets and
cracked manifolds/headers... Small gasket leaks and cracks often don't
get loud until the extremely high temp expands the manifold.

Anyway before you go nuts or tear the engine apart looking for more
expensive and more complicated problems. check the exhaust... There are
definitely other things it could be but I'd bet it's your exhaust.

--
Simon
"I may be wrong, but I'm not uncertain." -- Robert A. Heinlein

 

Robert Brown wrote:
> I use Rotella. It seems to not make the noise until it is warmed up. It
> seems louder at idle, but with the loudness of the engine anyway it hard to
> tell, but I've noticed that if I coast to a stop it goes away until I get to
> 1000 rpm or lower. The noise doesn't get louder when I step on the gas, just
> faster.
> I am fearing the worst
>
> "FullSizeJeep" <FullSizeJeep@gmail.com> wrote in message
> news:1136413211.627365.173200@g49g2000cwa.googlegr oups.com...
>
>>If the sound diminshes as the vehicle warms up, I can almost guarantee
>>that it is a noisy lifter. What kind of oil are you running?

Sounds like the notorious cracked 4.0 header.... doesn't "make the noise
until warmed up" is a pretty good indicator of an exhaust leak IMHO.
That 4.0 and the 4.2 before it are well known for leaking gaskets and
cracked manifolds/headers... Small gasket leaks and cracks often don't
get loud until the extremely high temp expands the manifold.

Anyway before you go nuts or tear the engine apart looking for more
expensive and more complicated problems. check the exhaust... There are
definitely other things it could be but I'd bet it's your exhaust.

--
Simon
"I may be wrong, but I'm not uncertain." -- Robert A. Heinlein

 

Robert Brown wrote:
> I use Rotella. It seems to not make the noise until it is warmed up. It
> seems louder at idle, but with the loudness of the engine anyway it hard to
> tell, but I've noticed that if I coast to a stop it goes away until I get to
> 1000 rpm or lower. The noise doesn't get louder when I step on the gas, just
> faster.
> I am fearing the worst
>
> "FullSizeJeep" <FullSizeJeep@gmail.com> wrote in message
> news:1136413211.627365.173200@g49g2000cwa.googlegr oups.com...
>
>>If the sound diminshes as the vehicle warms up, I can almost guarantee
>>that it is a noisy lifter. What kind of oil are you running?

Sounds like the notorious cracked 4.0 header.... doesn't "make the noise
until warmed up" is a pretty good indicator of an exhaust leak IMHO.
That 4.0 and the 4.2 before it are well known for leaking gaskets and
cracked manifolds/headers... Small gasket leaks and cracks often don't
get loud until the extremely high temp expands the manifold.

Anyway before you go nuts or tear the engine apart looking for more
expensive and more complicated problems. check the exhaust... There are
definitely other things it could be but I'd bet it's your exhaust.

--
Simon
"I may be wrong, but I'm not uncertain." -- Robert A. Heinlein

 

I think it may be a bearing or a rod, so alas, two motors on the same jeep
means something bad, but I swear it isn't me, always shifts at 1800 rpm,
never beat, so I'll run it till it dies.
"Robert Brown" <robertbrown798@verizon.net> wrote in message
news:nAHuf.5489$WX3.1174@trndny09...
> Hello folks. I've got a 92 xj (116k on body) with a motor from a 96 gc
> (4.0). The other day I noticed a tick, like a fan cover was hitting a
> blade, but alas not that easy. It seems to be coming from the motor close
> to the firewall. Oil pressure is good, temp is good, idles fine (other
> than the noise) and seems to be running on all six, but it is getting
> louder. When I put it in reverse it gets very loud. I hope it's not the
> motor, I bought this thing last Nov with 101k on it for $1100, and we love
> it. At 106k it blew a motor, I'm assuming the previous owner didn't treat
> it very well. I had the new motor put in (it was a bitch), it had 80k on
> it and have been putting rottella in it every 3k since, and now this. I
> can't afford to put another motor in it or even another xj right now (in
> the process of buying our first house), but this vehicle is our only car
> so please pray to the Jeep Gods and tell me this isn't a dead truck. It
> also goes in and out of part, full, and low with no problems.
>
> --
> ------------------------below this line are simply
> signatures---------------------
> Far better it is to dare mighty things, to win glorious triumphs, even
> though checkered by failure,
> than to take rank with those poor spirits who neither enjoy nor suffer
> much, because they live in the gray twilight that knows neither victory
> nor defeat - Theodore Roosevelt (1858 - 1919)
> Beware the fury of a patient man - John Dryden, Absalom and Achitophel
> (1681)
> A military operation involves deception. Even though you are competent,
> appear to be incompetent.
> Though effective, appear to be ineffective - Sun-Tzu, The Art of War.
> Strategic Assessments
> There's a fine line between genius and insanity. I have erased this line -
> Oscar Levant (1906 - 1972)
> "The Strength of the Pack is the Wolf,
> the Strength of the Wolf is the Pack"
>

 

I think it may be a bearing or a rod, so alas, two motors on the same jeep
means something bad, but I swear it isn't me, always shifts at 1800 rpm,
never beat, so I'll run it till it dies.
"Robert Brown" <robertbrown798@verizon.net> wrote in message
news:nAHuf.5489$WX3.1174@trndny09...
> Hello folks. I've got a 92 xj (116k on body) with a motor from a 96 gc
> (4.0). The other day I noticed a tick, like a fan cover was hitting a
> blade, but alas not that easy. It seems to be coming from the motor close
> to the firewall. Oil pressure is good, temp is good, idles fine (other
> than the noise) and seems to be running on all six, but it is getting
> louder. When I put it in reverse it gets very loud. I hope it's not the
> motor, I bought this thing last Nov with 101k on it for $1100, and we love
> it. At 106k it blew a motor, I'm assuming the previous owner didn't treat
> it very well. I had the new motor put in (it was a bitch), it had 80k on
> it and have been putting rottella in it every 3k since, and now this. I
> can't afford to put another motor in it or even another xj right now (in
> the process of buying our first house), but this vehicle is our only car
> so please pray to the Jeep Gods and tell me this isn't a dead truck. It
> also goes in and out of part, full, and low with no problems.
>
> --
> ------------------------below this line are simply
> signatures---------------------
> Far better it is to dare mighty things, to win glorious triumphs, even
> though checkered by failure,
> than to take rank with those poor spirits who neither enjoy nor suffer
> much, because they live in the gray twilight that knows neither victory
> nor defeat - Theodore Roosevelt (1858 - 1919)
> Beware the fury of a patient man - John Dryden, Absalom and Achitophel
> (1681)
> A military operation involves deception. Even though you are competent,
> appear to be incompetent.
> Though effective, appear to be ineffective - Sun-Tzu, The Art of War.
> Strategic Assessments
> There's a fine line between genius and insanity. I have erased this line -
> Oscar Levant (1906 - 1972)
> "The Strength of the Pack is the Wolf,
> the Strength of the Wolf is the Pack"
>

 

I think it may be a bearing or a rod, so alas, two motors on the same jeep
means something bad, but I swear it isn't me, always shifts at 1800 rpm,
never beat, so I'll run it till it dies.
"Robert Brown" <robertbrown798@verizon.net> wrote in message
news:nAHuf.5489$WX3.1174@trndny09...
> Hello folks. I've got a 92 xj (116k on body) with a motor from a 96 gc
> (4.0). The other day I noticed a tick, like a fan cover was hitting a
> blade, but alas not that easy. It seems to be coming from the motor close
> to the firewall. Oil pressure is good, temp is good, idles fine (other
> than the noise) and seems to be running on all six, but it is getting
> louder. When I put it in reverse it gets very loud. I hope it's not the
> motor, I bought this thing last Nov with 101k on it for $1100, and we love
> it. At 106k it blew a motor, I'm assuming the previous owner didn't treat
> it very well. I had the new motor put in (it was a bitch), it had 80k on
> it and have been putting rottella in it every 3k since, and now this. I
> can't afford to put another motor in it or even another xj right now (in
> the process of buying our first house), but this vehicle is our only car
> so please pray to the Jeep Gods and tell me this isn't a dead truck. It
> also goes in and out of part, full, and low with no problems.
>
> --
> ------------------------below this line are simply
> signatures---------------------
> Far better it is to dare mighty things, to win glorious triumphs, even
> though checkered by failure,
> than to take rank with those poor spirits who neither enjoy nor suffer
> much, because they live in the gray twilight that knows neither victory
> nor defeat - Theodore Roosevelt (1858 - 1919)
> Beware the fury of a patient man - John Dryden, Absalom and Achitophel
> (1681)
> A military operation involves deception. Even though you are competent,
> appear to be incompetent.
> Though effective, appear to be ineffective - Sun-Tzu, The Art of War.
> Strategic Assessments
> There's a fine line between genius and insanity. I have erased this line -
> Oscar Levant (1906 - 1972)
> "The Strength of the Pack is the Wolf,
> the Strength of the Wolf is the Pack"
>