Not another oil pressure question

9

92jeeper

NAXJA Forum User

Location

Orlando

• Sep 22, 2004

• #1

I have a 92 xj 4.0HO automatic tranny on 33's. I had all the seals replaced on the engine, and, oil pressure was pushing oil back up through my dipstick. Did a rubber gasket around that, and, it's still pumping back out the dipstick. Does anyone have an idea as to what's causing this? Oil pressure's running around 60 most of the time. But, i'm sick of every time i park, a puddle of oil is underneath my Jeep. Any help is greatly appreciated!
Tylor

 

FrankNBrew

NAXJA Forum User

Location

Royal Oak, MI

• Sep 22, 2004

• #2

Sounds like you have too much pressure in the crankcase. Is the PCV valve clogged? Or the breather?

 

9

92jeeper

NAXJA Forum User

Location

Orlando

• Sep 22, 2004

• #3

The breather has one of those stupid little racer filters on it right now. But, it just got changed. I'll have to check the pcv valve. I've also got 158K miles on the motor, so, normal wear and tear is expected, but, it's been parked for 30 minutes and there's a puddle of oil under it already.
Tylor

 

R

Roll-over

NAXJA Forum User

Location

San Antonio, TX

• Sep 22, 2004

• #4

if the breather and pcv aren't clogged check the cylinder compression. ideally there shouldn't be enough pressure in the crankcase to overload the breather as for each piston moving down there is one moving back up. You may be on the verge of bad rings.

 

D

dyna

NAXJA Forum User

Location

central coast Ca

• Sep 22, 2004

• #5

What years were there problems/ TB on the crank breather system? Is your air box getting oil in it also?

 

Ludakris

NAXJA Forum User

Location

Frederick, Maryland

• Sep 22, 2004

• #6

What about the Valve cover? could the breather opening be clogged from the inside? is there sludge somewhere like in an oil passage or something? I havent heard of this one before.....

 

I

Inisadow

NAXJA Forum User

• Sep 22, 2004

• #7

The jeep shouldn't be running at 60psi most of the time probably your blow by system. I had all the seals on mine replaced and right after that I started getting really high oil pressures 50 to over 60 took it back in turned out the blowby system was clogged up bad had to get it all replaced 180$ I think. and that was at 155,000miles.

 

D

dyna

NAXJA Forum User

Location

central coast Ca

• Sep 22, 2004

• #8

Check all the lines that go from the valve cover to the airbox or any other breather EQ. on my 95 the lines are small black plastic and it wouldent take much to plug them with carbon ect. sounds like you have a issue here. simply changing any seals will not make your oil pressure go up. I think 4.0s are rated at 37 psi at 2k rpm as acceptaple or normal. 60 is to high.