Join Date: Apr 2013
Location: Columbia, Missouri, USA
I'm thinking ahead a bit here, regarding valve shims.
I've kept everything bagged and labelled. I have the valves, springs, tappets, shims, etc. for each valve.
My question is: if I install different valves, will I have to re-shim them? Is the purpose of shims to compensate for valve stem length variations, or for differences in valve seat placement? I'm not replacing or resurfacing the seats, just lapping the valves.
I've read through several threads regarding shims, but I'm confused regarding how the measurements are taken, and how the required shim size is calculated.
1988 Spider Veloce (with lots of 3D printed parts)