V90 L6-2.9L VIN 96 B6304S (1998)
Piston clearance should be: 0.01-0.03 mm (max)
Piston ring side play:
Upper compression ring: 0.05-0.085 mm
Lower compression ring: 0.03-0.065 mm
Oil scraper ring: 0.02-0.055 mm
Piston ring dimensions, version 1 (1992-93)
Upper compression ring: 1.5 mm
Lower compression ring: 1.75 mm
Oil scraper ring: 3.0 mm
Piston ring dimensions, version 2 (1994-98)
Upper compression ring: 1.2 mm
Lower compression ring: 1.75 mm
Oil scraper ring: 3.0 mm
Wrist Pin diameter: 23.0 mm