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92jeeper
October 11th, 2004, 06:36
I've got a 92 xj with 160k. it's the 4.0. I just had all the seals redone, and, it's spitting oil back out the dipstick. It's runnin about 60psi. I know that's not normal. But, my mechanic says he thinks it a valve in the oil pump. If I idle, it'll sometimes drop to 20 psi. Does this sound like an oil pump problem? Thanks in advance.
Tylor
Los11
October 11th, 2004, 08:14
A buddy of mine had somewhat the same prob, and it was the oil pump.. But in your case it could be something different.
JeepsterXJ
October 11th, 2004, 08:25
Me jeep has your same pressure readings, but usually oil out the dipstick is an indication of blowby or a bad PCV. Do a compression test and see if you have a loss in a cylinder. It is odd that its doing this right after the seals were replaced, but why were the seals replaced? blowby (especially on turbo cars) has a way of blowing out seals and causing leaks.
92jeeper
October 11th, 2004, 08:58
Me jeep has your same pressure readings, but usually oil out the dipstick is an indication of blowby or a bad PCV. Do a compression test and see if you have a loss in a cylinder. It is odd that its doing this right after the seals were replaced, but why were the seals replaced? blowby (especially on turbo cars) has a way of blowing out seals and causing leaks.

Seals were replaced because it was leaking oil out the rear main, and, while he had it apart, i had him replace the rest of the seals. But, i'll be taking it up tomorrow to do the compression test then replace the pcv and check the oil pump. If that doesn't solve it, i don't know what to do.
Tylor
Dr. Dyno
October 11th, 2004, 09:19
If that doesn't solve it, i don't know what to do.

I think one of these measures will give the answer. It does sound like you have a case of blowby and that may either be caused by worn rings or by a blocked PCV system. Check your air filter. If it's coated with oil, that'll confirm the blowby diagnosis.
The easiest fix would be to unblock the PCV system by thoroughly cleaning the insides of all the PCV hoses, connectors, and the inside of the valve cover including the PCV baffles.
If the problem persists and the engine's burning oil, you'll need new rings. Abnormally low "dry" compression numbers together with higher "wet" compression numbers will confirm this.
RichP
October 11th, 2004, 09:39
Take off the oil filler cap and see if it still blows out the DS tube. Probably blocked ccv lines, the engine normally draws a vacumn on that area.