Zeroing in a fly wheel cover

[Pete]

Originally Posted by Terry, NJ

I did all that with the file, the pits are too deep.Wish I had Brent's grinder to clean up the surfaces. Many people's advice would be to junk it I'm sure.
Terry

Here is a simple way to get an indicator reading with a very pitted surface.
First, there must be enough flat surface left to do this. After simple cleaning with a file, make up a shoe for your indicator. Take a ordinary high tool speed tool bit, say a 3/8 square by 3 inches long and braze a pin to the middle of the tool bit that will fit in the indicator receiver hole. Now check the pin for 90 degrees to the bottom surface of the bit using another indicator. Close is good enough. Grind the corners off the bottom of the tool bit so it will slide easily over the surface being checked.
Now try checking your housing surface.