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Oil pressure is normal at start up. oil pressure drops from…

Customer Question
Oil pressure is normal...

Oil pressure is normal at start up. oil pressure drops from 40 to 20, then to zero after running for 10 to 15 minutes. 2008 GMC envoy. No over heating or loss of power. Seems to run fine

Mechanic's Assistant: Have you checked the coolant level? Have you checked to make sure the thermostat is working?

Coolant level is full. How does coolant or thermostat affect oil pressure?

Mechanic's Assistant: Are you fixing your Envoy yourself? What have you tried so far?

No. Just bought it and drove it home. drove it for 60 miles, no trouble except for low oil pressure warning. Temperature did not change. Ran about 210 degrees

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Seems to run fine on highway showing zero oil pressure. Im suspicious of the pressure sensor, but seller showed me work order that it was changed

Submitted: 9 months ago.Category: Car
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Answered in 4 minutes by:
9/16/2017
Auto Mechanic: David Craig, Auto Mechanic replied 9 months ago
David Craig
David Craig, Auto Mechanic
Category: Car
Satisfied Customers: 5,606
Experience: Owner/Mechanic at 3D Automotive
Verified

Hi Im David, thanks for visiting the site. I would not drive it again until the oil pressure is tested. you can also check the wiring to the sensor to make sure its not damaged.

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Customer reply replied 9 months ago
agreed. if a real problem existed, wouldnt I have loss of power, a change in engine temperature, or total failure after diving for 70 minutes at hiway speed?
Customer reply replied 9 months ago
Agreed, but if a real problem existed, wouldnt I have loss of power, engine over heating, or total failure after 70 minutes at hiway speed?
Customer reply replied 9 months ago
how do you test for oil pressur?
Auto Mechanic: David Craig, Auto Mechanic replied 9 months ago

standby

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Auto Mechanic: David Craig, Auto Mechanic replied 9 months ago

yes i agree, but are you going to take that chance?

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Auto Mechanic: David Craig, Auto Mechanic replied 9 months ago

what size engine?

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