Fitting Pistons
WARNING: This page is about a different car, the 1983 Volkswagen Vanagon, 1983 Volkswagen Rabbit, 1983 Volkswagen Quantum, 1983 Volkswagen Pickup, and 1983 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
Measure cylinder at 3 points: 3/8" (10 mm) from top and bottom, and at center of bore. Measure in line with and at 90° to thrust face. Cylinder wear limit is .0015" (.040 mm) out of round. If limit is exceeded, cylinders must be honed and new pistons fitted.
NOTE:
Quantum pistons have notch in skirt for oil jet.