Technical data

STD. REPAIR SERVICE
VALUE LIMIT LIMIT
Cylinder bore
W13 70.0 mm +0.2 mm +0.95 mm
W21, W27 73.0 mm +0.2 mm +0.95 mm
W33 78.0 mm +0.2 mm +1.20 mm
Cylinder bore oversize finish tolerance 0 to 0.03 mm for each oversize tolerance
Taper of cylinder bore 0.01 mm or less
12. Piston
Type Solid type
Material Aluminum alloy
O.D. (skirt end) W13 70.0 mm
W21, W27 73.0 mm
W33 78.0 mm
Piston to cylinder clearance
W13, W21, W27 0.25, 0.50, 0.75 mm
W33 0.25, 0.50, 0.75, 1.00 mm
13. Piston Pin
Type W13, W21, W27 Semi-floating type
W33 Full-floating type
O.D. W13, W21, W27 19.0 mm
W33 23.0mm
Piston to piston clearance 0.08mm
Piston to connecting rod clearance (Press-fit load:
W13, W21, W27 500 to 1500kg)
W33 0.10mm
14 Piston Ring
Number of rings
Compression rings 3 (No. 1: chrome plated barrel type and semi-keystone
type except W13. No. 2 & No. 3: tapered ring)
Oil ring 1 (Chrome plated: with coil expander - except W13)