<VV> Bizzare piston slap memories

[Michael]

I bought several sets of "forged" pistons from a vendor several years 
ago....since I always had the cylinders bored to the piston, the machine 
shop
caught the fact that they were marked .040 but were really .030.... 
Never, ever buy pistons separately from the cylinders and expect them to 
work.
Always hand the cylinders to the machinist and have them bored to the 
cylinders that he can measure in shop.

Mike McCrae

------ Original Message ------
From: "Hugo Miller via VirtualVairs" <virtualvairs at corvair.org>
To: virtualvairs at corvair.org
Sent: 11/1/2019 6:06:30 PM
Subject: Re: <VV> Bizzare piston slap memories

>Never take anything for granted! I once assembled a Bristol 2 litre  six cylinder engine. After I fitted the pistons, I had a piston pin circlip (snap ring) left over. I was certain I couldn't have forgotten to put one in somewhere, but of course I had to take the whole damn lot out to verify. Since then, I always COUNT the snap rings before assembly!
>
>On 2019-11-02 01:17, N2VZD TIM via VirtualVairs wrote:
>>I had a crazy issue a few years ago with brand new pistons . They
>>were supposed to be .060 (factory marked !) but were actually .030
>>measured . This was after going nuts with the sounds. The compression
>>was "OK" but the noise was almost like lifter noise or oil pressure
>>problem , but gauge showed good pressure. I will never buy parts like
>>that from anywhere but my trusted source. These were new parts in the
>>boxes from a private vendor at the Sturbridge .He probably had no idea
>>, because they were NOS not  properly marked in correct boxes  (they
>>said .060 on top but measured .030 at the shop.   Very strange noise!
>>I never had to check measurements before !Regards, Tim Colson
>>
>>
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