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Re: [Fot] I have piston shrinkage

To: Jim Gray <toodamnfunky@comcast.net> FILETIME=[A6CC1720:01CDC214]
Subject: Re: [Fot] I have piston shrinkage
From: Vince G <vangoughv@hotmail.com>
Date: Tue, 13 Nov 2012 22:03:40 -0500
Cc: "fot@autox.team.net" <fot@autox.team.net>
Delivered-to: mharc@autox.team.net
Delivered-to: fot@autox.team.net
References: <20121114024618.C063F2D06E7@autox.team.net>
Wow those are some interesting numbers..

Sent from my iPhone

On 2012-11-13, at 9:47 PM, "Jim Gray" <toodamnfunky@comcast.net> wrote:

> FoT
>
> Tonight I was reminded of the reason you don't measure stuff in the cold.
In
> a hurry
>
> to use my new measuring tools I shot straight out to the garage and started
> my post season
>
> measurements after the teardown. My pistons & liners look great so I was
> expecting everything to be
>
> well in spec with about 15 hours on them. I was horrified when I was coming
> up with a
>
> consistent .008 -.009 clearance. I measured the surface temp of the pistons
> at 59 -60 degrees.
>
> So I boiled some water and soaked the pistons for a few minutes. They came
> out at 92 degrees.
>
> The pistons grew .004" and puts them right in spec. That's a lot of growth
> at a 32 degree increase in temp.
>
> The liners measured out the first time within .001 of spec for the most
part
> at 60 degrees.
>
> jim g
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>
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