tn_outside2003
NAXJA Forum User
- Location
- Tennessee
My 4.0 is stock with 170,000 miles on it. Recently I got a salvaged 2005 Wrangler TUPY head and had it remanufactured and put on the XJ. I had the pan pulled and the oil pump replaced at the same time.
After this partial rebuild, the cold start/run oil pressure surges up to 75-80 psi under acceleration until warmed up when it settles down to about 45 under acceleration. A HOT idle is about 18-25 psi.
Oil is 5W-30.
The cold oil pressure seems a bit high to me. This is NOT a sending unit issue. Please do not post replies suggesting using a manual pressure gauge, or suggesting swapping sending units. The question is VERY straightforward and simple. It is a SINGLE QUESTION. ONE QUESTION ONLY:
Is 80 psi, under acceleration, in a cold 4.0, too high?
Answers would read something like this:
"That pressure is fine."
"That pressure it too high and something is wrong with your oil pump/pressure relief valve."
"My XJ has the same pressure."
"Your engine is fine and that pressure is normal."
"Your engine is not fine and that pressure is way too high."
Anyone?
Thanks.
After this partial rebuild, the cold start/run oil pressure surges up to 75-80 psi under acceleration until warmed up when it settles down to about 45 under acceleration. A HOT idle is about 18-25 psi.
Oil is 5W-30.
The cold oil pressure seems a bit high to me. This is NOT a sending unit issue. Please do not post replies suggesting using a manual pressure gauge, or suggesting swapping sending units. The question is VERY straightforward and simple. It is a SINGLE QUESTION. ONE QUESTION ONLY:
Is 80 psi, under acceleration, in a cold 4.0, too high?
Answers would read something like this:
"That pressure is fine."
"That pressure it too high and something is wrong with your oil pump/pressure relief valve."
"My XJ has the same pressure."
"Your engine is fine and that pressure is normal."
"Your engine is not fine and that pressure is way too high."
Anyone?
Thanks.