[TR] Subject: pully failure

[Catpusher at aol.com]

When Triumph went to the alloy fan extension, they reduced the pulley bolts 
 from 6 to 3; I have seen many more failures with this "TR4A" set up, and 
started  modifying the later units for the 6 bolts, which cured the problem, 
at least in  the short run.  For earlier cars, the problem was much less 
common.
 
Hardy
 
 
From:  Bob <yellowtr at adelphia.net>
Subject: [TR] pully  failure
.
<snip>
So when I got home I opened up the bonnet to  let the engine cool thinking 
I 
just had a loose belt when I noticed a  small piece of metal on the frame. 
It 
was a 2" piece of the inner part of  the pulley where the timing mark is 
located or was.

The bottom part  of the piece is not a fresh break so it looks like a crack 
developed over  time and finally went today.

Has anyone else experienced metal fatigue  in the lower engine pully?