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Re: Noisy Lifters even though they are new
#11
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JeromeSolberg
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When I read the spec it says "40 psi" for the oil pressure. So that seems right. I seem to remember seeing 35 psi somewhere else, but here it is in the book at 40 psi:

1951-54 Service Manual Specifications

What I saw on the gauge was a steady 40 psi, varying only slightly when I revved the engine or as the engine warmed up. You could see if I revved the engine the reading would rise slightly before settling down again.

Now tomorrow when I get the chance I will start the engine and let it run for a good 40 minutes and see if I can get the light to blink, perhaps by adjusting the idle down slightly.

It's possible that the idiot light is set a little high, since I have never tested it and have no idea how old it is. I didn't rebuild the oil pump internals but I did install a new relief valve, but it does seem to be working.

Will report back.

Thanks for your interest and advice.

JS

Posted on: 10/15 0:00
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Re: Noisy Lifters even though they are new
#12
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JeromeSolberg
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Update:

I ran the engine (idling) for more than 1 hour and 15 minutes.

After ~30 minutes I noticed the oil pressure (at idle) was dropping below 40.

By the end of 1 hour and 15 minutes the oil pressure at idle had dropped down to ~ 10 psi, though it rose quickly to 40 if I applied a bit of throttle. The little red light had yet to flicker. However, I ran out of time to find out at what oil pressure the light begins to flicker. Probably as was noted earlier b/t 5 and 10 psi.

Lifter began to slightly tick at about the same time as the oil pressure began to drop below 40, and the tick got louder as the oil pressure dropped.

May try again later for more data.

Posted on: 10/15 16:04
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Re: Noisy Lifters even though they are new
#13
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JeromeSolberg
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Well, since I had two extra lifters left over from rebuilding, I did the very best I could to determine which lifter was the loudest using an automotive stethoscope, which seemed to be Cylinder #5 intake or exhaust. So I replaced them both. That took about a day all told. I measured the clearance using the little gage I got from Pacific Northwest Packards, and it was between .040 and .060, so within spec of 0.030 to 0.070.

Now after another long drive it's seemingly no better than it was before. I listened again with my stethoscope and maybe it's another couple of lifters, maybe, and maybe a couple of other lifters farther away, it's very hard to tell. Maybe I replaced the wrong ones, or maybe I just didn't replace enough. It sounds like the ones I replace are "better", but they still maybe are clicking a little too, very hard to tell because I may be picking up noise from the lifters next door, maybe it's those I should have replaced.

I don't really know exactly what to do, order some more lifters? They are not cheap, and it's a lot of work to change them. Change the oil again and put in 20W50? I have Delo 15w40 in now, it seems not really better and perhaps worse than when I had the 10w30 in there.

I guess I'm just very frustrated right now. I don't know if there is any advice anyone can give me, but if there is I'm open to it. I cannot really figure out what I did wrong, sorry to vent.

Posted on: 10/26 17:19
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Re: Noisy Lifters even though they are new
#14
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Josef Lichtenberg
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did you change the valve springs too? Or only the lifers? I have used new today made valve srings. Some of them failed. ( broke in half) after a few miles. sounds similiar to ticking lifters.

Posted on: 11/11 4:32
Packard Super Clipper 1947
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Re: Noisy Lifters even though they are new
#15
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JeromeSolberg
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Thank you for the note. When I replaced 2 lifters I didn't see any broken valve springs, but I only took off one of the two valve covers.

I will be going back in soon, perhaps this weekend, hope to have a new report.

Posted on: 11/11 17:06
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Re: Noisy Lifters even though they are new
#16
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PackardDon
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Did you use the special gauge to adjust the valves with the new lifters? The adjustment requires machine shop work to grind the end of the valve stem or seat t get the proper gap, then when the hydraulic insert is put in place, it will work within the prescribed range.

Posted on: 11/11 20:50
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Re: Noisy Lifters even though they are new
#17
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JeromeSolberg
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Yes I have the special gauge, I got it from Pacific Northwest Packards (club project). I measured the clearance on all the valves, there were a few that were near 0.030, but all were in the range .030 to .070, which is spec. That was done cold.

But I'm going to measure them again. When I replaced the two lifters with the two spares the clearance was between .040 and .060.

But yes, good to check again. Thanks.

Posted on: 11/11 21:19
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