[SEL] Piston slap ????

[kevin armstrong]

JBC,

If you know your engine to stuffed fix it, so you can say you have restored 
the engine to the high standard expected of a member of the old engine 
organization.

regards

Kevin & Lorraine Armstrong
Collectors of old things
Perth
WA
Australia
Vintage Tractor & Machinery Association member
V.C.C. of WA. member
k_armstrong at arach.net.au
www.oldengine.org/members/armstrong

----- Original Message ----- 
From: <jbcast at charter.net>
To: "The SEL email discussion list" <sel at lists.stationary-engine.com>
Sent: Wednesday, January 14, 2009 2:21 AM
Subject: Re: [SEL] Piston slap ????


>
> ---- Tom Winland <gasenginetom at hotmail.com> wrote:
>>
>> Got a question for you guys.  I'm working on an engine and it has a knock 
>> in it and you only hear it when the engine is coasting down really slow 
>> but the slower it gets the louder it gets.  The noise is coming from the 
>> cylinder and it has been sleeved so that rules out egg shaped cylinder. 
>> Only thing that I can come up with is piston slap but I've taken a piston 
>> and rod out of an identical engine here and it does the same thing but 
>> the other engine doesn't make the noise and it's pretty irritating noise 
>> and is pretty loud.  You can't hear any loud knocking when the engine is 
>> running at a decent speed but only when slowed down to under 100 rpm that 
>> the noise starts.  Any ideas or suggestions are appreciated
>>
>> Thanks
>> Tom Winland
>> Ohio
>>
> Watch the rod from the rear of the engine, see if it's moving side to 
> side. I have a 12hp Hercules, the main brg is worn bad, crank is no longer 
> parallel to the cylinder, rod flops back and forth at low speed.
> J.B. Castagnos
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