2003 Buick Park Avenue oil pressure gauge

2003 BUICK PARK AVENUE
100,000 MILES
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JTGIBBS
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I have a Buick Park Avenue Ultra. It has 100000 miles, but only 10000 miles on a new motor. I am having a problem with the oil pressure gauge sticking. It is stuck at 130 pounds and for some reason it will not go down to around 40-50 lbs. That is where it used to be. I would like to know if it is in the gauge or in the oil pump. Do you think you can help me figure this out?
Aug 2, 2013 at 3:33 PM
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RASMATAZ
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Sounds more like the oil pressure relief valve is stuck closed-oil pump
Aug 2, 2013 at 4:21 PM
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JACOBANDNICKOLAS
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At 130psi, you would either leak from the oil filter gasket or the filter would expand. Check that. If everything looks good, then I would suspect the oil sending unit.

As rasmataz said, there is a pressure relief valve built into the oil pump. If you find either of the problems I mentioned, then the pump will most likely need replaced.
Aug 2, 2013 at 7:20 PM
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