[6pack] What size thrust washers do I need?

[Sally or Dick Taylor]

Peter---Yes, the "std." is .092 thick, and sometimes it isn't stamped as to size, as are to oversized ones. I'd just replace the .090 with a .097 (this would be the +.005) which should get you to your goal of .005 running clearance. You'll probably get a pair of these in a bag, so save the other as a replacement about 50,000 miles from now. Leave the +.030 where it is. This should cause no interference at the connecting rods.
If you feel your engine block or crank is worn to a point where there are special needs, then go with a custom set. To me, it doesn't seem that there is this need.

Dick
 


-----Original Message-----
From: PeterSchop at aol.com
Sent: Tuesday, November 18, 2008 11:15 AM
To: 6pack at autox.team.net
Cc: triumphs at autox.team.net
Subject: [6pack] What size thrust washers do I need?

I measured my crankshaft end float the other day and found it to  be just 
under .012".  I would like to get the end float closer to  .005" so I dropped the 
pan, took off the rear main bearing cap and removed the  thrust washers. What 
I found was one marked "STD" and measured at  .090" which showed a lot of 
wear and the other marked "+030" that measured  .122" and showed very little 
wear. I believe that STD should be .092" ?
 
 I have read online that the front washer should not change size  because it 
gets very little wear and you don't want to move the crankshaft  out of place. 
I have also been told that both the washers should be the same  size so to 
center the crankshaft which also makes sense. TRF sells sets of  thrust washers 
at STD, +.005", +.015" and +.030" which I believe both washers in  set are the 
same size.
 
 
Now I would like to reduce my end play from just under .012" to just  over 
005" which means I have to add .006" to my thrust washers. In order to do  that 
I need a total of .218" with both thrust washers measured together. I like  
the idea of using Scott Helms's solid bronze thrust washer. I could have a 
096"  made and my use my .122"  or if the front should not change I could  use a 
STD .092" and make a .0126" or if the crankshaft should be centered, have  two 
109" made, all which would equal .218" 
 
Oh, one more thing, TRF's list at $6.95 a set and Scott's are $20 each and  
are probably worth every penny of it. If you still follow me, any comments as 
to  which way to go?

 
TIA
 
Peter Schoppelry
TR6  '69

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