Measuring Pistons with Caliper · CutterUp Diesel Lab

Measuring Pistons with Caliper

Hey all,

Trying to do the right thing on a budget,

I’ve got a starret 3202, 0.001” accuracy, but I want to make sure I’m measuring correctly. I’ll be using this caliper to check piston to wall clearance and cam specs.

When measuring pistons, I go perpendicular to the piston, and I basically kind of move the caliper until in a radius until it’s snug. All the pistons came out at 4.055 “. My question is, should I just tighten once, or move in a radius like I do? If I try to eyeball the center they came out to 4.054”. These are early mahle pistons.

0:17

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Measuring Pistons with Caliper