Cylinder Walls

Calipers aren't accurate enough for measuring engine parts unless you are looking for an approximation. You wouldn't use calipers to measure pistons for boring a block. If you would, then you shouldn't be working on engines.

LOL ,, you're funny..

I shoulda said approx 5 - 6 thou. on several pistons,, pix speak for themselves.

I've used these same calipers to set pinion depth to a thou,, and it measures "marked" shims perfectly..

No,, it's not a mic.. but the difference is clear..

Whatcha gonna say when I show pix with a mic,, better start thinking now...