Curious, how do YOU check valve guides with the "wiggle" test?

- Just open enough to grab reliably so that any wear on the stem is still in the guide.
- Around .006-.010" for a stem to guide clearance of .002", which is a stockish kind of clearance. But that is VERY general number, because it will vary from engine to engine depending on guide length and distance from bottom of guide to valve head, and how tight you want the clearance to be. Exhaust would typically be OK on the higher end of that.