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Fordanswerman
Fordanswerman, Auto Service Technician
Category: Car
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Experience:  Ford Engine Master/Transmission Master/Chassis Master=Ford Senior Master also Diesel 7.3/6.0
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1968 Ford: 000 miles..oil pressure idiot light comes..oil pump

Resolved Question:

I have a 1968 Ford with a 390 and 135,000 miles. The oil pressure idiot light comes on when the engine warms up. I am trying to avoid a rebuild and have replaced the oil pump to no avail. Can the problem be a defective oil sensor? Or am i stuck with a rebuild.   Thanks, Rod. Riverside, CA
Submitted: 7 years ago.
Category: Car
Expert:  Fordanswerman replied 7 years ago.

Thanks for the question Rod.

 

It wouldn't hurt to try changing the sending unit. That would be a cheap fix. The best way of course would be to check the oil pressure with a guage to get some true accurate readings hot. Most Chilton manuals will have oil pressure specs.

 

If the oil pressure drops considerably, more than likely the engine bearings are worn. As the engine warms up, everything expands and thus, clearances get bigger and pressure goes down.

 

Thanks

Happy New Year

 

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