11.8 Technical Data 11 Engine F 650 CS Piston rings Groove 1: square-section ring Ring thickness mm (in) Ring height wear limit mm (in) Ring gap mm (in) Gap wear limit mm (in) Groove height wear limit mm (in) Ring groove float mm (in) Ring groove float wear limit mm (in) 1.2 (0.047) 1.15 (0.045) 0.2...0.4 (0.008...0.016) 1.0 (0.039) 1.30 (0.051) 0.03...0.065 (0.0012...0.0026) 0.15 (0.006) Groove 2:
stepped micro-taper ring Ring thickness mm (in) Ring height wear limit mm (in) Ring gap mm (in) Gap wear limit mm (in) Groove height wear limit mm (in) Ring groove float mm (in) Ring groove float wear limit mm (in) 1.5 (0.059) 1.45 (0.057) 0.2...0.4 (0.008...0.016) 1.0 (0.039) 1.6 (0.063) 0.03...0.065 (0.0012...0.0026) 0.15 (0.0059) Groove 3: steel-strip oil control ring Ring gap mm (in) Gap wear limit mm (in) Groove height wear limit mm (in) Ring groove float mm (in) Ring groove float wear limit mm (in) 0.2...0.4 (0.008...0.016) 1.0 (0.039) 2.6 (0.102) 0.03...0.065 (0.0012...0.0026) 0.15 (0.0059) Piston pin Piston pin dia.
Wear limit mm (in) 21.98 (0.865) Piston pin clearance in conrod bore mm (in) Wear limit mm (in) 0.015...0.029 (0.0006...0.0011) 0.050 (0.002) in bore (piston) mm (in) Wear limit mm (in) 0.012...0.021 (0.0005...0.0008) 0.050 (0.002) Cylinder Bore Cylinder “A” mm (in) Wear limit mm (in) 100.000...100.012 (3.9371...3.9376) 100.03 (3.9382) Bore Cylinder “B” mm (in) Wear limit mm (in) 100.012...100.024 (3.9376...3.9380) 100.04 (3.9386) Timing chain Wear limit mm (in) Distance from sealing face of plug to piston of chain tensioner 9.0 (0.354)