yes jim, I know exactly what you are referring to. but where shims are used correctly is between the rod and cap halves. then as wear indicates shims are removed. I have also seen brgs with shims inbetween the brg and cap. but this is not actually the correct way to go about correcting clearance. this is even interrupting the brg. crush as it has to fit snuggly to the cap and for heat transfer also. about the same thing as using silicone or glue on a loose sleeve. it will not transfer the heat properly. you don"t want the brg. moving around in the cap. as you say it is kind of the last resort fixes. to fix the problem the rods need to be resized to original spec"s. it is not that expensive of a job either.then the brg fits properly instead of trying to match the egg shape of the rod. rod checking and resizing is often overlooked. in this case we have so little info here and the guy is not offering to help with more info. my comment about useless idea on wk40"s is that the shims have caused more grief than benefit. they were never adjusted correctly and resulted in more engine failure. trying to explain shims to some guys they are lost and don"t understand the purpose of them. shims are there to be taken out as parts wear not added to worn parts. don"t mean to be sounding negative but I have made things work also in a bind and do know when things will and will not work. we still don't know if he is talking brg. clearance or rod side clearance. I have a feeling it is side clearance though.
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