Piston: Specifications

Piston
Diameter-LQ4 Measured at Size Point 101.58-101.598 mm (3.999-3.999 inch)
Diameter-LQ9 Measured over Skirt Coating 101.611-101.642 mm (4.000-4.001 inch)
Piston to Bore Clearance LQ4 Production 0.020-0.056 mm (0.0008-0.0022 inch)
Piston to Bore Clearance LQ4 Service Limit 0.0.020-0.081 mm (Maximum) 0.0008-0.0032 inch (Maximum)
Piston to Bore Clearance LQ9 Production 0.024-0.025 mm (0.00094-0.00098 inch)
Piston to Bore Clearance LQ9 Service Limit With Skirt Coating Worn Off 0.024-0.080 mm (0.00094-0.0031 in.)

Piston Pin
Diameter-Press Fit Pin 23.997-24.0 mm (0.9447-0.9448 inch)
Diameter-Full Floating Pin 23.952-23.955 mm (0.943-0.943 inch)
Fit in Connecting Rod - Press Fit Pin 0.020-0 043 mm (Interference) (0.00078-0.00169 inch (Interference))
Fit in Connecting Rod - Full Floating Pin Production 0.007-0.020 mm (0.00027-0.00078 inch)
Fit in Connecting Rod - Full-Floating Pin Service Limit 0.007-0.022 mm (0.00027-0.00086 inch)
Pin to Piston Bore Clearance - LQ4 Production 0.007-0.020 mm (0.00027-0.00078 inch)
Pin to Piston Bore Clearance - LQ4 Service Limit 0.007-0.021 mm (0.00027-0.00082 inch)
Pin to Piston Bore Clearance - LQ9 Production Measured at Pin End 0.002-0.010 mm (0.00008-0.0004 inch)
Pin to Piston Bore Clearance - LQ9 Service Limit Measured at Pin End 0.002-0.015 mm (0.00008-0.0006 inch)

Piston Rings
Compression Ring End Gap - LQ4 Production - Top Measured in Cylinder Bore 0.31-0.52 mm (0.0122-0.02 in)
Compression Ring End Gap - LQ4 Production - 2nd Measured in Cylinder Bore 0.51-0.77 mm (0.02-0.03 in)
Piston Oil Ring End Gap - LQ4 Production Measured in Cylinder Bore 0.31-0.87 mm (0.0122-0.034 inch)
Compression Ring End Gap - LQ4 Service - Top Measured in Cylinder Bore 0.31-0.59 mm (0.0122-0.023 inch)
Compression Ring End Gap - LQ4 Service - 2nd Measured in Cylinder Bore 0.51-0.84 mm (0.02-0.033 inch)
Oil Ring End Gap - LQ4 Service Measured in Cylinder Bore 0.31-0.94 mm (0.0122-0.037 inch)
Compression Ring End Gap - LQ9 Production - Top Measured in Cylinder Bore 0.31-0.52 mm (0.0122-0.020 inch)
Compression Ring End Gap - LQ9 Production - 2nd Measured in Cylinder Bore 0.51-0.77 mm (0.020-0.030 inch)
Oil Ring End Gap - LQ9 Production Measured in Cylinder Bore 0.31-0.87 mm (0.0122-0.034 inch)
Compression Ring End Gap - LQ9 Service - Top Measured in Cylinder Bore 0.31-0.59 mm (0.0122-0.023 inch)
Compression Ring End Gap - LQ9 Service - 2nd Measured in Cylinder Bore 0.51-0.84 mm (0.020-0.033 inch)
Oil Ring End Gap - LQ9 Service Measured in Cylinder Bore 0.31-0.94 mm (0.0122-0.037 inch)
Compression Ring Groove Clearance - LQ4 Production - Top 0.04-0.08 mm (0.00157-0.0031 inch)
Compression Ring Groove Clearance - LQ4 Production - 2nd 0.039-0.079 mm (0.0015-0.0031 inch)
Oil Ring Groove Clearance - LQ4 Production 0.015-0.2 mm (0.0006-0.0079 inch)
Compression Ring Groove Clearance - LQ4 Service - Top 0.04-0.08 mm (0.00157-0.0031 inch)
Compression Ring Groove Clearance - LQ4 Service - 2nd 0.039-0.079 mm (0.0015-0.0031 inch)
Oil Ring Groove Clearance - LQ4 Service 0.015-0.2 mm (0.0006-0.0079 inch)
Compression Ring Groove Clearance - LQ9 Production - Top 0.035-0.080 mm (0.0014-0.0031 inch)
Compression Ring Groove Clearance - LQ9 Production - 2nd 0.034-0.079 mm (0.0013-0.0030 inch)
Oil Ring Groove Clearance - LQ9 Production 0.012-0.20 mm (0.00047-0.00078 inch)
Compression Ring Groove Clearance - LQ9 Service - Top 0.03-0.080 mm (0.0014-0.0031 inch)
Compression Ring Groove Clearance - LQ9 Service - 2nd 0.034-0.079 mm (0.0013-0.0030 in.)
Oil Ring Groove Clearance - LQ9 Service 0.012-0.20 mm (0.00047-0.0078 inch)