[TR] TRactor engine: conrods big end tab washers. Needed or not?

Randall tr3driver at ca.rr.com
Sun May 30 14:25:37 MDT 2010


> I take it racers must have an 
> idea on this...

Triumph actually deleted the con rod lock tabs during TR4 production.  The
tab material is necessarily soft (so the tabs can be bent), and can pound
out causing the rod bolts to lose tension even though they don't turn.  

However, you need to check that the threads in the rod are deep enough
without the tab (or use the bolts from a later TR4/4A, which are slightly
shorter).  One way is to turn the bolt in lightly by hand, without the cap,
and compare the exposed length to the thickness of the cap.

Opinions are mixed as to whether Loctite is a good idea; but I use it.

Randall


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