mhead
NAXJA Forum User
- Location
- Encinitas, CA
Had a really bad time on my 1992 XJ 4.0 with auto trans with a Titan engine
(see http://www.naxja.org/forum/showthread.php?t=939290)
and eventually gave up. Titan went as a core to Jasper for a new rebuilt. This went in and has about 4000 miles on it. Engine runs fine and purrs. No running hot, no coolant leak. Everything's great, but...
About 3000 miles I noticed that one of the hydraulic lifters in the valve train isn't pumping up right away. I start the engine and it clacks until the engine begins to warm. If I start cold (70 deg C) it takes about 4 minutes for the clack to go away, or at about 150 deg C engine temp. When it goes away it just GOES. One second it's clacking and then in maybe 1 or two engine revolutions it's gone and sounds fine. And it stays fine thru the remainder of the use. But if the Jeep sits overnight or longer I hear it again.
Jasper suggested a NAPA oil filter with a anti-leakback valve. Tried this and still have same problem.
Jasper will pay to have this problem corrected. But my jeep will be down for a while and I don't like other people working on it.
So question is: how stuffed am I? Will I burn a valve during the limited warm up time? Think I could just leave well enough alone?
And next question: what might cause this in a new rebuilt motor?
I guess my jeep is mechanically jinxed...
Thanks for help!
Mike
(see http://www.naxja.org/forum/showthread.php?t=939290)
and eventually gave up. Titan went as a core to Jasper for a new rebuilt. This went in and has about 4000 miles on it. Engine runs fine and purrs. No running hot, no coolant leak. Everything's great, but...
About 3000 miles I noticed that one of the hydraulic lifters in the valve train isn't pumping up right away. I start the engine and it clacks until the engine begins to warm. If I start cold (70 deg C) it takes about 4 minutes for the clack to go away, or at about 150 deg C engine temp. When it goes away it just GOES. One second it's clacking and then in maybe 1 or two engine revolutions it's gone and sounds fine. And it stays fine thru the remainder of the use. But if the Jeep sits overnight or longer I hear it again.
Jasper suggested a NAPA oil filter with a anti-leakback valve. Tried this and still have same problem.
Jasper will pay to have this problem corrected. But my jeep will be down for a while and I don't like other people working on it.
So question is: how stuffed am I? Will I burn a valve during the limited warm up time? Think I could just leave well enough alone?
And next question: what might cause this in a new rebuilt motor?
I guess my jeep is mechanically jinxed...
Thanks for help!
Mike