This is topic Low Oil pressure? Why..... in forum Tech Talk at Northern California Ford Owners .
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Posted by Platinum Pony (Member # 970) on
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stays at very bottom of tach and when i push clutch in it drops all the way to red...my only guess is the oil filter but i dont really know...anyone have any ideas
Posted by MR GO FAST (Member # 2088) on
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have you recently changed the oil? what weight did you have and what weight did you replace with? how many miles on motor?
Posted by 93PONY (Member # 60) on
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Get a manual Oil pressure guage on there. If you really do have low oil pressure.....there's only one thing that causes that. The main bearings are going south.
If you actually do have good oil pressure on the manual guage, get a new sending unit.
Posted by white1990stang (Member # 2307) on
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yeah change the sending unit. i;ve had 2 go out on me.
Posted by JoeT (Member # 298) on
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there are tons of reasons for low oil pressure other than worn main bearings,
it can include:
worn rod bearings/journals, crank journals, the oil pump itself (whether clogged, it's tolerances out of spec, or it's pressure regulator)
low oil
and as mentioned a faulty sender
Posted by Platinum Pony (Member # 970) on
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its 10-40 my car has 145,000 miles but sometimes the oil pressure is fine and sometimes its not which also kind of makes me think that its a sensor and not a actual mechanical problem so how much are those things and where can i get one...??
Posted by JoeT (Member # 298) on
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the "classic" worn engine (mains, crank and journals, rod/etc) low pressure cycle goes like this:
cold start/idle: oil pressure excellent
hot idle: oil pressure low to poor (even zero)
cruise (1800+ rpms): oil pressure excellent
a mechanical oil pressure gauge from autometer is under $40 I think, you can find a little cheaper gauge probably at auto parts stores.
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