Oil pressure too high-97 cobra????

[Dan Gray]

My friend bought a 97 cobra just under a year ago and has no problems with the car until now. I just did an oil change on his car adn the oil filter was bulged. I didn't like that so i did an oil pressure check and it reads 80psi at idle and 120psi revved up. It sounds to me that the pressure releif valve is broken or faulty.

Has anyone else run into this? Im just putting out the question to see before i spend a few days pulling the engine out.

Thanks

Dan

 

[COBRA90GT]

Wow, is that 80psi at warm or cold idle?


I see 80-90psi at cold idle (autometer electric oil pressure gauge here), which is "normal."

 

[Dan Gray]

no that is hot.....

 

[1995cobraR]

I hope the previous owner didn't put 20W50 mineral racing oil in it. What oil did you use?

You could jack up the engine and pull the pan to check the pump. Stock pumps will not generate 120psi.

Where did you check the pressure?

How many miles on the car (or engine)??

 

[SicStang89]

The stock idle should be around 38-40 Psi I believe and it should only go up to 80-90 when revved......

 

[Dan Gray]

The stock idle should be around 38-40 Psi I believe and it should only go up to 80-90 when revved......

Thats what i thought, i think im pulling the pan off to see what is going on.

Thanks guys

 

[rogair]

oil pressure too high

Dan, did your friend ever figure out his high oil pressure in the 4.6?
I've got a '99 town car limo w/ same oil pressure....80 at idle,100 @ 3000....