Jeep Grand Cheerokee 1993 139,000 straight 6cyl

1993 JEEP
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MKENNEDY
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While driving(at 65mph) I noticed that the oil pressure gage was reaching 80psi. It normally stays around 60psi at that speed. I changed th oil and other than that it seems to run just fine. I've heard of older vehicles losing pressure, never gaining. What could be wrong ??
Apr 22, 2007 at 7:36 PM
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MERLIN2021
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Pump has a blockage in the pressure relief valve...check again with an external pressure gauge, and have a look at you oil filter. Any signs of a buldge?
Apr 28, 2007 at 11:13 PM