Re: Low oil pressure?
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Virgil & Sue Klein
It would depend on the reason for the leaking rear main. If the seal is worn out, of course it will leak, but that may not affect oil pressure. However, if the rear main is leaking because the rear main bearing is worn then you could also have low oil pressure. There are other reasons for low oil pressure including worn cam bearings, a worn out oil pump, or oil that has too low of viscosity or just low oil levels. You could also have an oil pressure gauge or sending unit that is malfunctioning. Hopefully it isn’t too serious or expensive to fix. By the way, does a ’71 have a PCV system? If so, you might want to be sure that everything is functioning properly. A plugged PCV valve or a constricted hose can create tremendous pressure in an oil pan that will push oil out of any weak spot.