An Excel Valve Clearance Spreadsheet

[Viper Pilot]

I use fine Emery cloth for 'sanding' my shims. Works great.

 

[RossKean]

Wet 220 grit carbide to remove material. Finer to finish. (400, I think.)

 

[MrM0t0]

It was about the same as that. What kind of sandpaper are you using? Wet or Dry?
I was using some woodworking finishing paper. I'd have to go find my old posts to see what the grits were.

It does take some persistence.

I'll try Ross' carbide idea.

 

[RossKean]

Paper on flat smooth surface. Shim on the paper with a little water. Finger on shim and move in a figure 8 with moderate pressure. I used a good digital caliper to check thickness frequently. Micrometer is more accurate but caliper is faster and I was satisfied with my accuracy. Verified by measuring known shims and feeler gauge blades with the caliper. I went through about two or three pieces of 220 grit to do 6 shims.