Hi Steve
If you are only going to replace the bearings without a regrind slide one of
the old ones out and look at the back, they are often stamped with the size
or std, I would take a bet that the stamping means that both mains and rod
(big end) bearings have been ground 0.010" under size. If there is nothing
of use stamped on the back, IMHO you will have to drop the crank far enough
to get a micrometer on the main journals (only one) you might be able to do
this if the timing gear is removed, be warned this could damage the input
shaft if you drop it too far, DO NOT PULL IT DOWN. The other alternative
that just sprung to mind is that with the thrust bearings and the rods
removed you may be able to slide the crank far enough forward to measure the
bit sticking out the front of no1 main bearing. When you buy your thrust
bearings buy the size that is in there and the next size up ansd you can mix
and match to reduce the float to an acceptable level.
eg if the thrusts in there are standard and you buy std and +0.005 and use
one of each you can make a +0.0025 set I have used this method to get the
float down to the min value (0.004" I think!)
I too have no experience with plastiguage so cannot comment on its use
though I did read up on it and it looked more complicated than removing the
crank to measure it, probably easier if you have some to use whilst
following the instructions.
Graham.
----- Original Message -----
From: Steve Nabors <topdown@eudoramail.com>
To: The List <triumphs@autox.team.net>
Sent: Thursday, February 17, 2000 5:54 AM
Subject: Main/Rod Bearings/Thrust Washer Replacement
>
> Listers,
> I'm about to replace my main bearings, thrust washers and rod
bearings(TR6). I've dropped the pan and have found no spare parts(thrust
washers in the pan). Looking up at the crankshaft, I noticed the
counterweight between the number 1 piston rod and the front main bearing had
the following stamped on it:
>
> 010
> 010
>
> Does this mean my crank has possibly been turned to accept 010 undersize
bearings?
>
> Regardless, how do I measure the crank journals, I've heard of plastigauge
but never used it or do I need a micrometer or something else?
>
>
>
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