Hi Larry
I have a bag of thrust washers I use for setting endfloat, the washers
consist of Std, +0.005, +0.010 and I think +0.015, I mix and match until I
get the float down to 0.001 below minimum specification, so on yours I would
head for 0.003 and be confident that after running in the float would be
0.004. I don't think there is a big worry with differential expansion as
most of the thickness of metal between the bearing surface of the crank is
ferrous based (including the backings for the washers) and will expand about
the same as the steel crank assuming a similar rise in temp.
Graham.
----- Original Message -----
From: "Larry Plott"
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.
>
> Regards,
>
> Larry Plott
> lplott@triad.rr.com
> 1967 TR4A-IRS
> 1966 E-Type 2+2
> 1960 MGA
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