low oil pressure or bad sensor or something else

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John J

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May 26, 2013
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michigan
My Car
1973 red convertible 351 4 V
My oil pressure has been different lately and I am not sure why. Its used to read 3/4  to high and then drop to mid point when the engine warmed up. Now it reads 3/4 to high  but will drop down to nothing once the car warms up. The sensor is about 4 years old. I did pull the wire off and clean the post. That didn't make a difference. I have a extra sensor so I will change it out next. Car starts and runs fine. oil level on the dip stick is good.   The only work I did to the engine was changed out the valve cover gaskets.

Thanks

John

 

Don C

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Jan 1, 2012
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Springfield, OR
My Car
1971 Mustang Sportroof M code
I have a mechanical oil pressure gauge that I use for these situations, along with a variety of fittings, that I have had for many years.

You can get a gauge kit at Harbor Freight:

https://www.harborfreight.com/engine-oil-pressure-test-kit-62621.html

A mechanical gauge shows minor fluctuations in real time. Useful for spotting worn bearings, especially main bearings, when there's a lot of change from acceleration to deceleration.

 
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