[Fot] TR4 Main Bearing Clearance

[Joe Boruch]

Tim, I been having my blocks align honed and then we double check all the
clearances.  Any block that I have used has needed some align honing.  I run
0.0025 inch clearance.  Were each of the bearing halves measured in multiple
places?  I usually take 9 measurements on each with a caliper with ball tips.
Measure 3 spots across near each end and 3 spots across the center.  You could
have had a bearing half that was thicker in some spots.  Also, 0.002 is way
too close for these engines, never mind 0.001.

I would also suggest an oil accumulator, since even with the big pan you could
have some oil starvation.  I would also suggest a synthetic race oil, after
you break it in with a mineral based oil.
I have not tried the coatings, but would also be interested in other's
experience.
That's my 2 cents.  Joe(B)

---------- Original Message ----------
From: "Tim Murphy" <timmurph at fastbytes.com>
To: <fot at autox.team.net>
Subject: [Fot] TR4 Main Bearing Clearance
Date: Tue, 19 Jan 2010 18:23:11 -0600


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