my Low dollar 318 hop-up project

318willrun said

Just thought I'd throw out a couple of pictures of valve cleaning......
Intakes clean up in about 45 seconds, and look great!!! They usually do....
Exhaust take the beating, and they take about 8-10 minutes to clean up. The face is pitted. Hopefully the exhaust clean up with the lapping, because I don't want to spend any money on the valves......

Click to expand...

Questions on the valve cleanup:
- What is the abrasive wheel on the bench grinder yo are using there?
- What are you doing about guide measurements and valve stem diameters?

BTW, if a valve slips and hangs up between the wheel and frame in this process, it can bend the stem juuust enough to not seal well... ask me how I know.... so be careful here.