Phil Kelly Posted October 4, 2019 Report Share Posted October 4, 2019 I'm having a bit of trouble with my 1947 Chrysler Windsor. Cold start, I have around 20 pounds at idle. Then it drops to 0 and stays at 0. Idle and cruising. At first I thought it was my gauge, but after a quick check with a modern one, it does the same thing. So I was wondering what could be my problem and what are the normal readings because there is nothing specific in my manuel about oil pressure. Quote Link to comment Share on other sites More sharing options...
Merle Coggins Posted October 4, 2019 Report Share Posted October 4, 2019 20 psi at idle isn't bad, with hot oil. Cold oil will usually net around 40-50 psi at idle and possibly slightly higher at higher RPM. If you have 0 at idle and while cruising when warmed up you have a problem. You could have a oil pressure relief valve stuck open. This is located along the lower block skirt near your oil dip stick tube. 1 Quote Link to comment Share on other sites More sharing options...
plymouthcranbrook Posted October 5, 2019 Report Share Posted October 5, 2019 My 52 Plymouth holds about 45 psi hot or cold.. Idle sometimes on a hot engine goes to 20 or so. Never lower. Using 10-40 conventional oil 1 Quote Link to comment Share on other sites More sharing options...
Dodgeb4ya Posted October 5, 2019 Report Share Posted October 5, 2019 Is the new gauge hooked up after the rubber flex hose or before directly to the block? The rubber hose could be swollen closed. As mentioned also check the pressure relief valve and the oil filter for sludge/ plugging by pass valve in filter housing. 1 Quote Link to comment Share on other sites More sharing options...
Phil Kelly Posted October 8, 2019 Author Report Share Posted October 8, 2019 So I check the oil pressure relief valve and it's not stuck. Oil filter is new and there is no sludge. For the new gauge, it has a small nylon hose hooked up directly to the block. I've been told that the timming may have something to do with the low oil pressure, but I don't think it's true. Quote Link to comment Share on other sites More sharing options...
lepic56 Posted November 1, 2019 Report Share Posted November 1, 2019 so did you find anything new on the low oil pressure ??? Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.