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10-05-2023, 05:26 PM | #1 |
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Shiming the oil pump pressure relief spring
Since my intake is off I'm wondering if and what your ideas or experiences are in order to increase the oil pressure by shiming the regulator spring on my '35 stock motor with lo pressure after warmed up. Florida weather, 5lbs or less at idle hot.
thanks Last edited by BobR35; 10-06-2023 at 05:36 AM. |
10-05-2023, 06:42 PM | #2 |
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Re: Shiming the oil pump pressure regulatory
My guess is the engine is worn out. That won’t rebuild it. Probably not help at all there’s other factors why you have low oil pressure.
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10-05-2023, 06:55 PM | #3 |
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Re: Shiming the oil pump pressure regulatory
I think Tony has the correct answer. How much oil pressure does it have running down the road ?
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10-05-2023, 07:27 PM | #4 |
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Re: Shiming the oil pump pressure regulatory
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10-05-2023, 09:54 PM | #5 |
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Re: Shiming the oil pump pressure regulatory
Sounds like an old Ford. Drive it like you stole iit.
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10-05-2023, 10:26 PM | #6 |
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Re: Shiming the oil pump pressure regulatory
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10-06-2023, 05:21 AM | #7 |
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Re: Shiming the oil pump pressure regulatory
Understand that. But do they go bad and allow too much oil to pass thereby lowering the pressure?
Last edited by BobR35; 10-06-2023 at 05:34 AM. |
10-06-2023, 06:33 AM | #8 |
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Re: Shiming the oil pump pressure relief spring
BR35> It runs great, no issues.>
Then don't try to fix it. |
10-06-2023, 06:36 AM | #9 |
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Re: Shiming the oil pump pressure relief spring
what weight oil are you using?
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10-06-2023, 07:35 AM | #10 |
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Re: Shiming the oil pump pressure relief spring
It sounds like the bottom end may have some wear, has it always had this problem or is it a new thing? I had this happen on 38 Lincoln when I added the old style oil filter. I wasn't aware the there should have been a metering fitting(AKA restrictor) in line. if this has been the norm for a long while I would run 20 50 and see if it helps.One last thing would be to put a temporary mechanical oil pressure gauge on it to verify what your stock gauge is telling you. Tim
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10-06-2023, 07:44 AM | #11 | |
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Re: Shiming the oil pump pressure regulatory
Quote:
Generally no...but it sure won't hurt to inspect the spring and valve while you have the intake off. If the seating areas look good and the spring is in one piece and has decent tension it won't improve pressure to shim it in your case. However, it won't hurt anything either. The 5 lbs at warm idle and 10 lbs at speed is a bit odd. Usually an engine with 10 lbs at speed will idle at zero. The gauge may be suspect if the relief valve and spring are ok. Terry
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10-06-2023, 05:25 PM | #12 | |
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Re: Shiming the oil pump pressure regulatory
Quote:
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10-06-2023, 05:28 PM | #13 | |
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Re: Shiming the oil pump pressure relief spring
Quote:
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10-06-2023, 05:29 PM | #14 |
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Re: Shiming the oil pump pressure relief spring
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10-06-2023, 07:23 PM | #15 |
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Re: Shiming the oil pump pressure relief spring
Are you running an oil filter??
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10-06-2023, 08:27 PM | #16 |
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Re: Shiming the oil pump pressure relief spring
here are pictures of the spring
Last edited by BobR35; 10-06-2023 at 08:36 PM. |
10-06-2023, 08:28 PM | #17 |
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Re: Shiming the oil pump pressure relief spring
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10-06-2023, 09:11 PM | #18 |
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Re: Shiming the oil pump pressure relief spring
I've always wondered about flathead filters. Modern clean roads and all. Change oil at 2000 miles or so. You should be good. Newc
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10-07-2023, 08:45 AM | #19 |
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Re: Shiming the oil pump pressure relief spring
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