Variable oil pressure

Jul 10, 2004 5 Replies
W

My 1983 Suburban (6.2 diesel) has always had steady 40 psi oil pressure. Lately however the pressure is all over the place, varying between 10 and



80 psi. I changed the oil and filter (it was about time anyway) but no change. I always keep the oil level topped off, and since I have an oil leak (that predates the pressure problem) that I haven´t gotten around to fixing, I check my oil level daily.

What things might cause oil pressure to start varying like this, and what can be done to correct it?



TIA, Warren


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M

Oil pump pressure relief valve or trash in the pan...... Either way u gotta drop the pan to fix it. Are u sure the gauge is working correctly and is not screwing with your head, obtain a mechanical gauge and double check if in doubt.

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S

The first thing that you should do is change the oil pressure sending unit. GM oil pressure sending units have always been notorious for doing this kind of thing after a while. I've replaced literally

100's of them for this type of complaint. Start here, and if that doesn't fix it, you will have to dig a little deeper. If you don't want to spend money on a sender that may still be ok, then you will need to get a mechanical gauge and check the oil pressure with that. But I'd guess that the unit is faulty.

Ian

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M

What things might cause oil pressure to start varying like this, and what can be done to correct it?

============== ============== Shiden Kai wrote in.....

The first thing that you should do is change the oil pressure sending unit.

Ian =========== ===========

snipped-for-privacy@verizon.net (LKN4SNO) agreed with.....

I'd agree with the gauge. Usually an oil pump either works or it dont.

LKN4SNO ============= ============= marsh put motion to vote with......

I third the motion at hand. all in favor ..? so be it !!!

Motion has been approved by a show of hands!

jest don't git no oil on yer fez......

next item please

MarshMonster ~:~ ========== ==========

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W

Thanks everybody. I´ll check that gauge.

Warren

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