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Unread 04-26-2007, 06:10 PM   #1
Tom Kuhn
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High Oil Pressure

I'm having an issue with my son's 92 Wrangler 2.5. He bought it 3 years ago, and it's always running high on pressure. It has just recently begin to climb. It has about 92,000 miles. With the engine warm, ideling showed about 65 Psi. Driving on the interstate took the pressure beyond 80 PSI. The oil is never low, and changed every 3000 miles. The oil currently has less than 100 miles on it. Currently using 10W30.
I changed the sending unit, pressure remained the same. I then connected up a mechanical gauge, the pressure read pretty much the same (3-4 lb difference).
I checked the ccv lines on the outside, no clogs or dirt. I gave in and dropped the pan, and changed the oil pump.There was no sludge, dirt or filings in the pan. Ideling warm now goes to about 55Psi, and the 2500 rpm still almost goes to 80.
What's next?

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Unread 04-26-2007, 06:15 PM   #2
Sahara88
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I think that might be normal, My oil pressure gage is always past the 6... Im not sure if it's normal, but the way i see it is it's better than having low oil pressure.....
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Unread 04-26-2007, 06:24 PM   #3
93YJNewf
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Mine's the same too.....just thought is was normal
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Unread 04-26-2007, 06:55 PM   #4
jay-h
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Quote:
Originally Posted by Tom Kuhn
I'm having an issue with my son's 92 Wrangler 2.5. He bought it 3 years ago, and it's always running high on pressure. It has just recently begin to climb. It has about 92,000 miles. With the engine warm, ideling showed about 65 Psi. Driving on the interstate took the pressure beyond 80 PSI. The oil is never low, and changed every 3000 miles. The oil currently has less than 100 miles on it. Currently using 10W30.
I changed the sending unit, pressure remained the same. I then connected up a mechanical gauge, the pressure read pretty much the same (3-4 lb difference).
I checked the ccv lines on the outside, no clogs or dirt. I gave in and dropped the pan, and changed the oil pump.There was no sludge, dirt or filings in the pan. Ideling warm now goes to about 55Psi, and the 2500 rpm still almost goes to 80.
What's next?
If you turn on the key without starting the engine, does it read zero?

You can replace the sender for a few bucks, probably not a bad idea (my sender was bad when I bought mine and read ridiculously high. Happily the oil pressure is still ok with the new sender.
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Unread 04-26-2007, 07:14 PM   #5
RAZORBILL
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My 95 4 banger reads 40 at idle and just shy of 60 at 2500 rpm (107k). That's with a new sending unit a couple weeks ago. Not real sure what "normal" is. I'm using Mobil 1 10w-30...

Al
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Unread 04-26-2007, 07:15 PM   #6
Canadian89yj
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mines off the charts too...
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Unread 04-26-2007, 07:42 PM   #7
Tom Kuhn
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Quote:
Originally Posted by jay-h
If you turn on the key without starting the engine, does it read zero?

You can replace the sender for a few bucks, probably not a bad idea (my sender was bad when I bought mine and read ridiculously high. Happily the oil pressure is still ok with the new sender.
It does read zero, I just changed the sending unit 2 weeks ago. I even confirmed the readings with a mechanical guage. I think the readings are ok.

Thanks for the suggestions.
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Unread 04-27-2007, 04:21 PM   #8
Sahara88
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Is it normal to be past "6" all the time??
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Unread 04-27-2007, 06:49 PM   #9
Tom Kuhn
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Quote:
Originally Posted by sahara88
Is it normal to be past "6" all the time??
Once it warms up, the Idle drops down to 50 - 55 psi. As you drive, depending on your RPMs, the pressure goes up and down.
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Unread 04-27-2007, 07:47 PM   #10
rustywrangler
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sounds like my situation too. never really bothers me as long as I have pressure.
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Unread 04-27-2007, 10:22 PM   #11
daciuk55
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The stock owners manual for the 4.0 at least says that normal should be between 20 and 65
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Unread 04-27-2007, 10:39 PM   #12
Monk89 94 I4
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mine has never read below 45, and is always 60-75 depending on my rpms..

Will
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Unread 04-28-2007, 08:14 AM   #13
bogger jeep
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man i wish i had that kind of problem. mine runs good until it warms up then drops to 10. its a wheeling only rig so i just drive it. when it blows i'll swap in a 4.0 efi
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