Hi Bruce,
Get the crank and fly wheel assembly balanced, it will not cost a lot and
you will not regret it. After all you have gone this far!!.
Regards
David Tinker. Wales UK
----- Original Message -----
From: <Eganb@aol.com>
To: <Triumphs@autox.team.net>; <british-cars@autox.team.net>;
<tr8@mercury.lcs.mit.edu>
Sent: Saturday, October 14, 2000 11:49 PM
Subject: TR7 BFH #7
> The continuing saga of the TR7 with the Bearings From Hell continues....
>
> Well, there was a delay getting the crank turned, since the T. Hoff crank
man
> was sick for about a week, but I finally picked it up on Friday and they
only
> had to take off .010, and the bill was only $60 and the crank looks fab.
AND
> they introduced me to PLASTIGAGE Clearance Indicators which I had never
seen
> before -- leading the T. Hoff guys to roll their eyes at me trying to
rebuild
> the TR7 -- in a half-joking sort of way.
>
> For those of you as in-the-dark as I was, this stuff is nothing more than
> what looks like a stiff piece of dental floss. you take a half-inch or
so,
> and place it on the inside of one of the new bearings, then put in the
> crankshaft and tighten down the bolts for that one journal to the right
> torque. then you take it apart again, and retrieve what is now a
flattened
> piece plastigage and measure its width. The more it is flattened, the
less
> clearance you have in the new assemble, and the TR7 manual should tell me
how
> much clearance I should have. In this way, you can make sure that the
newly
> ground crank and new bearings are going to have enough oil flow. Really
neat
> trick.
> Apparently race car mechanics check every journal this way.
>
> Now the bad news. I have had my first major mistake. When I took the
> flywheel off, I marked it and the end of the crank with paint so I could
> re-assemble it the same way. Of course the T.Hoff guys did a complete
> cleaning of the crank, and the paint marks are long gone.... No wonder
you
> are suppose to make the mark with a chiesel...
> The manual talks about checking the runout with a dial gauge when a new
> flywheel is put on, so I assume there is a way for me to fix this mistake
and
> make sure the flywheel is re-mounted correctly?
>
> Laughs are ok, as long as advice comes afterwards!.... And at least the
> paint marks I used for the driveshaft and transmission flange are still
> there!!! I don't think there were any others I needed to worry
about?.....
>
> As always, thanks for the help.
>
> Bruce
> 1980 Inca Yellow TR7 5-speed convertible
> Chapel Hill, NC
>
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