Drop in oil pressure
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Joined: Sep 2001
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From: Howard Lake USA
Drop in oil pressure
I recently had to replace my oil pump because it fell apart and locked up and caused the roll pin in the distributor to break. Anyways after i replaced the pump i had real good oil pressure and now a few months later my oil pressure has dropped down to 10 psi at idle and going down the road. I have installed a manual oil pressure gauge and i get the same reading.
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Drop in oil pressure
You probably have a blown head gasket or cracked head. The cream is from water/coolant in the oil, the foam is from bypass gasses and the crank putting air in the oil. I'm even afraid to tell you to do a compression check. Collant in the oil will distroy your bearings, fast! There is only one other thing that will put water in your oil, and that, believe it or not, is a plugged PCV valve. However, water from a plugged PCV Valve will take months to actually show up in the oil. The first place you see that is in the filler cap. If your oil is creamy, change it and the filter (use cheap oil, you'll probably have to through it out) and do a compression test to see if you have a blown head gasket (probably 2 low cylinders) or a cracked head (probably one low cylinder) Don't drive it with creamy oil unnless you want to do a total rebuild very soon. Herman
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Joined: Sep 2001
Posts: 169
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Drop in oil pressure
Then Start with a vacuum check. That may be enough. Your vacuum will be low and probably irregular. If the doesn't prove it, do a compression check. I'm sure you have a blown head gasket or a cracked head. Herman
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