Guidance on Adjusting Main Shims Insutu
Evening guys,
Fired up my 29 six cyl today after head replacement (Thanks Karl!), new timing chain, new rings, wrist pins & bush, and rod ends reshimmed almost snug.
After a first couple of short runs, 10 minutes total, , had a pronounced thud, thud, thud. Appears with more compression I now have a sloppy main or two. Engine is still on the stand so pulling the cap will be done from beneath. Tranny is attached to help with rear sag. I made a tool last year to help pull the main caps on an engine with catastrophic freeze damage. So I've done that plus have spare shims and good caps. Other than that I have not adjusted shims on the mains yet. I'm hoping the center main is the thumper. Any advice welcome, please.
Thanks
Jack
Fired up my 29 six cyl today after head replacement (Thanks Karl!), new timing chain, new rings, wrist pins & bush, and rod ends reshimmed almost snug.
After a first couple of short runs, 10 minutes total, , had a pronounced thud, thud, thud. Appears with more compression I now have a sloppy main or two. Engine is still on the stand so pulling the cap will be done from beneath. Tranny is attached to help with rear sag. I made a tool last year to help pull the main caps on an engine with catastrophic freeze damage. So I've done that plus have spare shims and good caps. Other than that I have not adjusted shims on the mains yet. I'm hoping the center main is the thumper. Any advice welcome, please.
Thanks
Jack
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