[TR] Subject: Engineer Question again!
tony at tonydrews.com
Mon Apr 21 21:40:06 MDT 2014
Just went through an exercise replacing wrist pins in my custom
Wiesco pistons. Learned a couple of things in the process - pistons
are made for either circlips or for spiral locks, and the wrist pin
is made differently depending on which of those you run too. The end
of the wrist pin is flat for spiral locks and has a chamfer on the OD
if running a circlip (to help push the circlip back into the groove
in the piston, presumably).
I would imagine that a mismatched set of circlip / spiral lock in a
piston / wrist pin made for the opposite one could result in the
keeper leaving the piston.
The delrin button seems pretty foolproof, but I've never used them.
At 08:30 PM 4/21/2014, Randall wrote:
>---- Catpusher at aol.com wrote:
> > Perhaps you want to check the snap rings in the other pistons
> > whilst you are in there
>Come to think of it, wasn't there someone advocating the use of
>Delrin buttons rather than snap rings, for just that reason? Along
>the same lines,has anyone tried using spiral locks?
>Also, just a rumor, but I've heard it said that circlips that come
>loose sometimes indicate the rod is not true. Might be worth
>checking as long as you have it apart.
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