I have an 1989 5.7 GTA with 133k and everytime the car warms up, the oil pressure drops from 30 to 0 and the temp goes to 240. I changed the oil, filter, radiator fluid, and air filter. I just don't get it, there is a very slight oil leak from the pan but not around the heads, it is clean. Do I need a new oil pump or are the rings bad. It was a police impound (sat for 18 months) and has had a rough 18 years. I am restoring the car but don't want to spend a fortune just yet. Any thoughts?
Oil pressure drop
Manz1989GTA
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I have an 1989 5.7 GTA with 133k and everytime the car warms up, the oil pressure drops from 30 to 0 and the temp goes to 240. I changed the oil, filter, radiator fluid, and air filter. I just don't get it, there is a very slight oil leak from the pan but not around the heads, it is clean. Do I need a new oil pump or are the rings bad. It was a police impound (sat for 18 months) and has had a rough 18 years. I am restoring the car but don't want to spend a fortune just yet. Any thoughts?
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Thanks for the advice! I am putting a new oil pump and thermostat in it on Friday. I am hoping that these easy fixes will solve the problem. I will then attempt to drive it from St. Louis to Chicago
![Image]()
(where it has sat since I bought it in April) with AAA Gold card in hand.
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So far, I have flushed the radiator (it wasn't bad at all), checked the thermostat (still working), changed the oil and filter, and checked all the head gaskets (they are not leaking). I will try some of the other things mentioned and post later this week. I still have not taken off the oil pan and checked the pump.
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