I have an 81 bronco with a 351m and when i get off the freeway or drive for awile withuot stopping its got a rod knock and my gauge always reads on L or so. i did a oil pressure test a i got about 66-68psi at idle and revin it up its about 70psi is that high? Is that something i should worrie about? O its got 10w40 in it. Thanks for any help you guys san give me
I had a 428 PI that would get 100 psi with a heavy duty oil pump. The pressure you mention is about right for a stock oil pump - neither too high nor too low. Sounds to me like the problem is the sending unit - not the pressure.