<VV> TRW Piston Problem

[Mike McCrae]

Smitty, ...I’d run a “sled” with a dial indicator on it down that cylinder 
and see what kind of diameter variations you are dealing with.
I’ve seen some that look like the tracings on an oscilloscope....
First, though, I’d mike it and see what the “actual” numbers are......??
I’ve heard some strange results from the “New” TRW’s.....seems they are now 
made in India....

Mike McCrae

-----Original Message----- 
From: BobHelt at aol.com
Sent: Saturday, May 18, 2013 6:54 PM
To: vairologist at cox.net ; virtualvairs at corvair.org
Subject: Re:  TRW Piston Problem

Well, Smitty, It's non-professional Bob Helt here and It looks like I'm the
best you are going to get.

Of course all piston to cylinder clearances are spec'd at the
skirts...about 2 inches down from the top of the piston. So that is where 
you  need to
take your measurements. You didn't say whether you have cast or forged
pistons, but assuming the clearances is spec'd at 2 thou, use a long feeler
gauge or a 3/8 in wide strip of 2 thou paper and use it as a gauge to tell 
your
final clearance.The piston should have a slight drag with the gauge
inserted  when you move the piston down away from the paper. Specs are for 
total
piston clearance so you measure ONLY one side.

Hope that this helps,
Regards,
Bob Helt


In a message dated 5/18/2013 10:43:27 A.M. US Mountain Standard Time,
vairologist at cox.net writes:

Smitty  Says;  I have run into a problem I need some professional advice
on.

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