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piston slap
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Joined:
2008/9/4 11:02
From bensenville il.
Posts: 102
My 41 120 has piston slap in #4 cylinder. Short of re-boring the cylinder, is there another solution. After the engine warms up the noise disappears. Please advise, and what is a piston skirt expander?

Posted on: 4/17 14:16:33
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Re: piston slap
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Joined:
2015/1/16 9:43
From sw, pa
Posts: 893
I know they use to talk about knuralizing pistons before. Don't know if they do that anymore.

Posted on: 4/17 14:33:19
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Re: piston slap
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Joined:
2007/3/14 16:01
From New Jersey
Posts: 15496
Old-fashioned remedies for piston slap when finances prohibited a proper rebuild: (1) knurling the skirt on the thrust face to expand the diameter of the skirt, and (2) install a piston expander. Both were capable of providing some short-lived relief, I did both myself many years ago. Plenty of descriptions of needed tools and materials in older editions of service manuals such as Glenn's.

A skirt expander is just that, a spring steel device inserted into the piston from below which exerts an outward, stretching force on the skirt.

If you need illustrations I can provide some from Glenn's Manual.

Posted on: 4/17 14:45:01
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Re: piston slap
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2015/1/16 9:43
From sw, pa
Posts: 893
Never heard of Glenn's Manuals.....

Posted on: 4/17 15:07:24
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Re: piston slap
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Joined:
2007/3/14 16:01
From New Jersey
Posts: 15496
In terms of teaching auto service fundamentals, IMO Glenn's was the gold standard of manuals.

PS - page from Glenn's section on piston service.

Attach file:



jpg  piston expansion Glenns.jpg (427.11 KB)
177_5cb7bc10b713f.jpg 926X1465 px

Posted on: 4/17 15:22:40
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Re: piston slap
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2015/1/16 9:43
From sw, pa
Posts: 893
I'd only ever seen Motors and Chilton. Of course now there is Haynes.

Posted on: 4/17 20:03:11
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Re: piston slap
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2009/1/7 19:30
From Fort Worth, Texas
Posts: 1879
OD,
What years does your Glennís cover?

Posted on: 4/17 20:19:47
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Re: piston slap
Forum Ambassador
Joined:
2007/3/14 16:01
From New Jersey
Posts: 15496
The covers and front's piece are long gone; the listings of specifications in the back seem to cover the range of 1953 to 1963.

Posted on: 4/18 5:31:11
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Re: piston slap
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Joined:
2008/5/22 13:43
From Vancouver, WA
Posts: 543
FYI I just checked ebay and found plenty of the manuals to go around.

Posted on: 4/18 6:01:41
_________________
Steve
Old cars are my passion

1951 Packard 200
1953 Packard Clipper Custom Touring Sedan
1955 Dodge Custom Royal Lancer Tri-tone
1966 Rambler Classic 770 Convertible
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Re: piston slap
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Joined:
2009/1/7 19:30
From Fort Worth, Texas
Posts: 1879
I have the 1966 version. which there are many for sale on eBay.

I got it from my neighbor in the 70ís. Even though it did not list Packard, It did help with basic automotive steps to take. I did not have any Information on my 55 Patrician. Started acquiring Chilton manuals as well until I joined the Packard Club and bought reprints from small world press.

Posted on: 4/18 8:58:26
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