Engine oil PSI
I just got my first jeep. It's a 91 Cherokee with a 4.0 with 211K miles on it. When I start it cold it has 60 PSI oil pressure after it's warm it has 20 PSI oil pressure then stays there the whole time I'm driving stopped or moving. This seams low to me. Is this normal?
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200k is alot of miles. its abit low but 20 psi will work. if you are overly concerned you could throw a new oil pump in it and roll some new bearings in it in a day.
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do you have a stock oil pressure gauge or an after market mechanical/electronic gauge?
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the stock gauge is not the most accurate thing in the world. i picked up an after market gauge to check mine, ended up permanently mounting it too. it reads about 45-50 psi at cruising speeds and climbs to just below 60 for higher RPM shifts. and only drops down to 20 psi during medium-long idles (about 2 minutes and up)
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Stock gauge. I have a local shop that will replace the rod, main bearings, oil pump and timing chain for 1200 bucks. If I go this route should I use high volume pump or a stock pump?
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those readings sound pretty normal
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One thing I have thought about is maybe the oil pressure sending unit is not working right.
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Originally Posted by OrangeXJ
(Post 459491)
One thing I have thought about is maybe the oil pressure sending unit is not working right.
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Originally Posted by OrangeXJ
(Post 459491)
One thing I have thought about is maybe the oil pressure sending unit is not working right.
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My jeep was around 45 at start up and then lowered to around 20 on stock gauge before the rearend went out. But it never did go below 20
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