Fred Hayek wrote:
I want to check the valve guide bores in an automotive cylinder head. I've
seen some small-bore micrometers that cost several hundred dollars. These
are out of my budget. Can I get an accurate measurement with the less
expensive "split ball' type gages, some of which are sold under good names
like Starrett and Mitutoyo, and a regular flat anvil outside micromeeter?
Thanks
Stan and Harold beat me to it; but small pin gauges are cheap, and the
guides will be tapered, big bell at the bottom on any motor.

If it has seperate guides already, send the wife out shoppping for the
day, get some dry ice for the new guides, crank up the oven and have at it.