Re: Noisy Lifters even though they are new
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I'd check your actual oil pressure with an actual guage at the sender port. If something is off with the rebuild and you getting low oil pressure, that would only get worse when the oil gets hot.
Also check the oil line/filter plumbing to make sure nothing was assembled incorrectly. The filter side of the line should have a restrictor so the bulk of the oil goes to the lifters. If the restrictor is missing or the assembled incorrectly so the restrictor is on upper end side, then you could be starving the lifters. Start with a pressure reading just to see where you're at hot and cold.
Posted on: 2021/10/13 6:37
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-BigKev
1954 Packard Clipper Deluxe Touring Sedan -> Registry | Project Blog 1937 Packard 115-C Convertible Coupe -> Registry | Project Blog |
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Re: Noisy Lifters even though they are new
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Quite a regular
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Hi JS,
I had my 1954 359 rebuilt, including all new lifters. Two of the lifters were noisy after the rebuild and I had to have them replaced. Financially painful! Good luck, Les
Posted on: 2021/10/13 9:40
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Re: Noisy Lifters even though they are new
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Home away from home
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Did you use the special tool for checking clearance before putting in ths lifter insert? If not, the valves may be out of adjustment so will require disassembly and grinding to get the proper clearances.
Posted on: 2021/10/13 14:35
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Re: Noisy Lifters even though they are new
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Home away from home
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Yes I did use the special tool, which I got from Pacific Northwest Packard club. Everything was in-spec though some were perhaps on the margins. I had checked oil pressure early on with a mechanical gage. I am going to install it again, perhaps temporarily in the cab.
Posted on: 2021/10/13 14:58
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Re: Noisy Lifters even though they are new
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Home away from home
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Worn or pitted guides and valve stems will cause what sounds like lifter problems, but usually not so temperature sensitive. Of course if the parts are new this is not the cause. I did valve work with the manifolds in place working under the fender.
Posted on: 2021/10/13 15:19
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Re: Noisy Lifters even though they are new
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Home away from home
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I reattached my mechanical gauge (to the last oil gallery plug at the rear of the engine on the passenger side) and ran the engine for about 30 minutes, until I could get the lifter to tick again just enough to hear. Oil pressure held steady at 40 psi. I think when it gets real good and warm after 40 minutes or so the oil pressure might drop down to a bit less than 35, when the little light will blink a little at idle (depending on how low I set idle).
Good thing is that I believe I have isolated which lifter it is. I have a couple of spares lifters so I will investigate replacing that one. Hope I can do it without taking the manifolds off.
Posted on: 2021/10/14 18:17
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Re: Noisy Lifters even though they are new
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Forum Ambassador
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Yes, you can easily replace the hydraulic units without having to remove the manifolds. Even for a full valve job they do not have to be removed.
Oil pressure sending units for "idiot light" systems are usually designed to trigger the bulb to flicker at about 5-10 psi.
Posted on: 2021/10/14 19:11
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Re: Noisy Lifters even though they are new
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Home away from home
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Good point. I think I will try running it one more time with the oil pressure gage attached and see if I can get a reading when the light starts to flicker. Thanks again.
Posted on: 2021/10/14 19:49
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Re: Noisy Lifters even though they are new
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Home away from home
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Don't these engines have an oil pressure cut off at 35 PSI? So would 40 PSI mean that the relief valve isn't functioning?
And if the dash light is blinking at 35 PSI, then that would mean the sending unit is bad, correct? For reference, I installed a mechanical oil pressure gauge under my dash and it reads between 30-35 when first started, then will drop to 18-20 when warm at idle. When driving it's up around 25-33 depending on speed. I have mechanical tappets, running 15W-40 oil. -Kevin
Posted on: 2021/10/14 22:59
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