I was driving the car in 80 degree weather, engine temperature was approx 95c, and the oil pressure dropped from the normal 60 psi to 10 while driving 2000-3000 rpm. The car has a mechaincal gauge and an idiot light (not sure what pressure it comes on at).
I stopped and checked everything it semed to be normal. I opened the oil fill cap and oil was splashing like normal. So I decided to nurse the car home.
As I slowly accelerated the gauge would climb to about 35 PSI at 2500 RPM but then start going back down at about 2800 rpm to around 10 psi at 3500 rpm.
When the car is first started cold the oil pressure goes up to about 70 psi. At 1000 rpm idle when engine is bleow 80c the pressrue is over 25 psi.
Any thoughts, sticking relief valve? Bad oil pump?
have the same problem?
Thursday, May 20th, 2010 AT 10:17 AM