Right on top of the crank, where the new bearing (in the cap) will contact it. It is vital that you do nothing to smear the plastigauge, either by bumping (twisting/spinning) the crank or rocking the bearing/cap into place.Originally Posted by Jon K
Yes, torque as specified, then remove the bearing/cap as gently as possible so the plastigauge is not disturbed from the original, torqued, squish.
The plastigauge should come with a 'gauge' to read the squish. Match up the width of the squished plastigauge with the markings on the 'gauge' to see how much clearance you have.
Patience is key as you have quite a few bearings to check. Doing the rods will drive you if you don't have the pistons connected and in the bores.
Brian