Hi Larry,
I had a similar problem on my TR4A rebuild in that, using standard
thrust washers (not oversized), I was only able to achieve .003". I
must have messed around with it for several hours or so trying to tap
the crank this way and that. My final resolution was setting it up so
that I had the same clearance on both sides of the thrust washers and
main bearing cap, and tightened it down there. My reasoning was that,
if the tolerance was too tight, then the thrust washers would wear a
little, and it would basically set itself up (since the crank can move
back and forth as you engage and disengage the drivetrain). Sounds like
you're basically in the same boat - judging from the problems that my
father had with his TR6 engine (thrust washers in the pan, engine block
destroyed), I would go with a little tighter instead of a little looser.
Hopefully others will respond with more info than I can provide.
Hope it helps,
Jeff
-----Original Message-----
Subject: Thrust Washers
Okay, I am in a bit of a conundrum. End play on my TR4A crank is
supposed to
be .004" - .006". That is simple enough to understand. The problem is
that
during my engine rebuild, I have discovered that I have .008" end play.
The
only oversized thrust washers are +.005". I have verified that with the
replacement thrust washers I now only have .003" or perhaps slightly
less.
(In my ignorance, I had hoped that each set would be only .0025"
totaling
.005" instead of each side at .005").
Unless someone can bring new information to the table, I think my
options are
to pick either .003" which is too tight or .008" which is too loose. I
understand that this is a real weakness in the TR4 engines so I want to
get it
right. Please advise.
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