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(1) 2 »

piston slap
#1
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Just can't stay away

casey rog
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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: 2019/4/17 16:16
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Re: piston slap
#2
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John
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I know they use to talk about knuralizing pistons before. Don't know if they do that anymore.

Posted on: 2019/4/17 16:33
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Re: piston slap
#3
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Owen_Dyneto
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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: 2019/4/17 16:45
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Re: piston slap
#4
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John
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Never heard of Glenn's Manuals.....

Posted on: 2019/4/17 17:07
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Re: piston slap
#5
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Owen_Dyneto
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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  (271.52 KB)
177_5cb7bc10b713f.jpg 926X1465 px

Posted on: 2019/4/17 17:22
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Re: piston slap
#6
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John
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I'd only ever seen Motors and Chilton. Of course now there is Haynes.

Posted on: 2019/4/17 22:03
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Re: piston slap
#7
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Let the ride decide
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OD,
What years does your Glenn's cover?

Posted on: 2019/4/17 22:19
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Re: piston slap
#8
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Owen_Dyneto
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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: 2019/4/18 7:31
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Re: piston slap
#9
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Steve
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FYI I just checked ebay and found plenty of the manuals to go around.

Posted on: 2019/4/18 8:01
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
#10
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Let the ride decide
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I have the 1966 version. which there are many for sale on eBay.

I got it from my neighbor in the 70's. 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: 2019/4/18 10:58
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