This is topic Low oil pressure??? in forum Tech Talk at Northern California Ford Owners  .


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Posted by COBRAreflection (Member # 5247) on :
 
I finally put my 331 into the stang, but I have a problem. The oil pressure when the car is cold is around 60 psi and after it warms up it drops to 5 psi. I bought the motor used off a friend and it only has about 3,000 miles since built. I'm thinking a bad oil pump, but what else should I be looking at?
 

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Posted by kingmoochr (Member # 5834) on :
 
what weight oil and who built it. does the pressure increase with rpms? whats peak pressure when hot
 

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Posted by COBRAreflection (Member # 5247) on :
 
10w30, and as the rpms go up the oil pressure does as well, @ idle when hot its @ 5 psi
 

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Posted by 2stangs69-91 (Member # 1951) on :
 
Doubt it is a bad oil pump. Do you have a mechanical test gauge to verify your readings? Throw some 20-50 wt in it.
 

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Posted by kingmoochr (Member # 5834) on :
 
you need 10 psi per 1000 rpm. change for 20-50 and report back. could be tolerances that are too lose or another reason (bad oil galley plug, etc) you are bleeding pressure
 

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Posted by jaejae (Member # 7958) on :
 
HAVING A BIG HOLE IN YOUR OIL COOLER WOULD MAKE YOUR PESSURE LOW..

[ December 30, 2007, 01:13 AM: Message edited by: jaejae ]
 

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Posted by jmcclesk (Member # 1355) on :
 
How does a large oil cooler cause low oil pressure????? please explain.
 

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