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Q: What is the cause of high oil pressure in your 3.8 Bonneville?
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Will a bad oil pressure switch cause high oil pressure in a 91 jeep warngler?

It could cause a high reading on the gauge.


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A cause for high oil pressure could be related to the type of oil that is being used in the vehicle. Thicker based oils such as 10w40 and higher could cause high oil pressure.


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Too much oil in an automotive engine can cause high oil pressure. High oil pressure could cause blown seals and gaskets allowing oil to leak out.


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A worn out, tired, high mileage or abused engine could cause low oil pressure.


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Where is the oil pressure sending unit located on a 2003 pontiac bonneville?

It's located by the oil filter


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What would cause the oil pressure to drop to zero on a 1994 Pontiac Bonneville while it is idling Now the pressure stays low even when the car is idling high does that mean something worse is wrong?

Your gauge Could Be Reading Wrong, Sender Bad Ect. Other Things If Oil Pressure Is Bad. Oil Pump Bad, Cam Bearings Bad, Crankshaft And Rod Bearings Bad. Have Your Oil Pressure Tested By A Mechanic With A Pressure gauge To Get The True Pressure. It May Just Be A Bad Oil Pressure Sender. Also You Need To Use The Recommended Weight Of Oil. Best Place To Start Have Pressure Tested. Good Luck


Why is oil pressure extremely high after oil change?

Because high oil pressure is good...


Will low oil pressure cause vehicle not to start?

Low oil pressure in itself will not cause the motor not start. Low oil pressure is a cause for concern as far as motor lubrication. Low oil pressure can cause lubrication failure and be harmful to all moving parts.