28-06-2021, 09:43 PM
(This post was last modified: 28-06-2021, 10:51 PM by Bob Culver.)
The fancy stepped pieces are only to hold the gudgeon whilst attending the screw. The 1/2 inch part should be slightly reduced .The gudgeons must be supported to avoid twisting the rod. Short pieces of any metal just under 1/2 inch dia can be used. If cut with a hacksaw the ends can be trued in a drill press against emery paper, or pulled down stationary onto a file .
Cases of loose and broken bolts seems often traceable to gudgeons excessively tight in the pistons. These must turn freely at all temps., but should be no discernible play, It is unusual to swap gudgeons as the fits are very precise.
Do not attempt any lapping with abrasives as grit embeds.
(editted as initialy read to mean gudgeons to be swapped)
Cases of loose and broken bolts seems often traceable to gudgeons excessively tight in the pistons. These must turn freely at all temps., but should be no discernible play, It is unusual to swap gudgeons as the fits are very precise.
Do not attempt any lapping with abrasives as grit embeds.
(editted as initialy read to mean gudgeons to be swapped)