Piston, Engine

Piston
Diameter
Coded Red 88.962-88.978 mm (3.5024-3.5031 inch)
Coded Blue 88.988-89.004 mm (3.5035-3.5041 inch)
Coded Yellow 89.014-89.030 mm (3.5045-3.5051 inch)
Piston-to-Bore Clearance 0.030-0.056 mm (0.0012-0.0022 inch)
Service Limit 0.081 mm Max.
Ring Groove Width
Compression (Top) 1.530-1.555 mm (0.0602-0.0612 inch)
Compression (Bottom) 1.530-1.555 mm (0.0602-0.0612 inch)
Oil 4.030-4.055 mm (0.1587-0.1596 inch)
Piston Pin
Length 76.5-77.2 mm (3.012-3.039 inch)
Diameter 23.162-23.175 mm (0.9119-0.9124 inch)
Clearance to Piston 0.005-0.012 mm (0.0002-0.0005 inch)
Clearance to Rod Press Kit 4 KiloNewtons (900 Lbs.)

Service Piston Selection(c)
Piston Bore Diameter & Service Piston Grade Required
89.009-89.035 mm (3.5043-3.5053 inch) Red
89.035-89.060 mm (3.5053-3.5063 inch) Blue
89.060-89.086 mm (3.5063-3.5073 inch) Yellow
(c) When replacing pistons, measure the cylinder bore and install the indicated service piston.

Piston Rings
Ring Width
Compression
Top 1.460-1.490 mm (0.0575-0.0587 inch)
Bottom 1.460-1.490 mm (0.0575-0.0587 inch)
Oil Ring Side Seal - Snug Fit
Service Limit Side Clearance 0.15 mm Max. (0.006 inch Max.)
Ring Gap (In Gauge)
Compression
Top 0.25-0.50 mm (0.01-0.02 inch)
Bottom 0.25-0.50 mm (0.01-0.02 inch)
Oil Ring (Steel Rail) 0.25-1.25 mm (0.010-0.049 inch)
Side Clearance
1st Ring 0.040-0.095 mm (0.0016-0.0037 inch)
2nd Ring 0.040-0.095 mm (0.0016-0.0037 inch)