45 PSI Cold idle..normal or high?
#1
Thread Starter
Junior Member
Joined: Jan 2011
Posts: 98
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From: Toms River, NJ
Year: 2001
Model: Cherokee
Engine: 4.0
45 PSI Cold idle..normal or high?
I have a cracked cylinder head and I was moving the jeep out of the driveway so the tow truck could pick her up and I noticed my cold idle oil pressure stayed around 45PSI while moving her. Had it running for maybe 2 and a half minutes.
Is that fairly normal or high?
The reason I ask is because most people say (and manual) it should be over 13PSI at idle, but I have a cracked cylinder head and im not sure if that affects it a lot. Just seems that 45 psi is high for cold start up, but that is why I am asking you guys.
Thanks.
Is that fairly normal or high?
The reason I ask is because most people say (and manual) it should be over 13PSI at idle, but I have a cracked cylinder head and im not sure if that affects it a lot. Just seems that 45 psi is high for cold start up, but that is why I am asking you guys.
Thanks.
#2
Senior Member
Joined: Jun 2009
Posts: 670
Likes: 0
From: Central Pennsylvania
Year: 1989
Model: Cherokee (XJ)
Engine: 4.7 H.O.
It's fine, unless it's spike above 70 or below 10, your fine. Besides, the pressure gauges are known to go bad just like that. I think mine reads 60 + on a cold start and doesn't drop til it's warm.
#3
CF Veteran
Joined: Apr 2009
Posts: 1,601
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From: Kalamazoo, MI
Year: 2000
Model: Cherokee
Engine: 4.0L with throttle body spacer and cold air intake, bored throttle body, #784 injector upgrade
My 00 sit's around that or a little more when cold. Once it's warm it goes down to 20 or so. Running down the highway or under power it is around 50.
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