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Remember to measure actuals and not use book specs in building an engine !!!!! These are references only.
Piston, Engine
Piston
Piston diameter
Coated grade 1 88.990-89.010 mm (3.5035-3.5043 inch)
Coated grade 2 88.998-89.022 mm (3.5039-3.5048 inch)
Coated grade 3 89.010-89.030 mm (3.5043-3.5051 inch)
Uncoated grade 1 88.970-88.980 mm (3.50275-3.50314 inch)
Uncoated grade 2 88.978-88.992 mm (3.50306-3.50362 inch)
Uncoated grade 3 89.010-89.030 mm (3.50432-3.50511 inch)
Piston-to-bore clearance
0.012 to 0.022 mm (0.0005-0.0009 inch)
Pin bore diameter (piston)
21.008-21.012 mm (0.8270-0.8272 inch)
Piston Ring, Engine
Ring groove width
Compression (top) 1.230-1.245 mm (0.0484-0.0490 inch)
Compression (bottom)1.530-1.545 mm (0.0602-0.0608 inch)
Oil ring 3.030-3.055 mm (0.1192-0.1203 inch)
Piston pin
Length 60.51-60.08 mm (2.382-2.365 inch)
Diameter 21.011-21.013 mm (0.0013 inch)
Pin-to-piston clearance
-0.005 to +0.001 mm (0.0001-0.00003 inch)
Pin-to-rod clearance
Standard 0.004-0.020 mm (0.0001-0.0007 inch)
Service limit 0.035 mm (0.0013 inch)
Piston Ring-To-Groove Clearance
Compression (top) 0.040-0.075 mm (0.0015-0.0029 inch)
Compression (bottom) 0.040-0.085 mm (0.0015-0.0033 inch)
Oil ring Snug Fit
Piston ring gap g
Compression (top)-gauge diameter 0.100-0.250 mm (0.0039-0.0098 inch)
Compression (bottom)-gauge diameter 0.27-0.42 mm (0.0106-0.0165 inch)
Oil ring (steel rail)-gauge diameter 0.15-0.65 mm (0.0059-0.0255 inch)
Compression (top)-service limit 0.50 mm (0.0196 inch) max.
Compression (bottom)-service limit 0.65 mm (0.0255 inch) max.
Oil ring (steel rail)-service 1imit 0.90 mm (0.0354 inch) max.
g Specification 82.4 mm (3.2441 inch) diameter gauge.
Piston Pin, Engine
Piston pin bore diameter
21.017-21.031 mm (0.827-0.828 inch)
Crankshaft bearing bore diameter
53.015-53.035 mm (2.0872-2.0879 inch)
Length (center to center) 138.06-138.14 mm (5.435-5.438 inch)
Alignment (bore to bore max. difference) e
Twist 0.050 mm per 25 (0.0019 per 0.984 inch)
Bend 0.038 mm per 25 (0.0014 per 0.984 inch)
Side clearance (assembled to crank)
Standard 0.100-0.30 mm (0.0039-0.0118 inch)
Service limit 0.35 mm (0.0013inch) max.
e Pin bore and crank bearing bore must be parallel and in same vertical plane within the specified total difference when measured at the ends of a 203 mm bar, 101.5 mm on each side of rod centerline.
Crankshaft, Engine
Crankshaft
Main bearing journal diameter 62.968-62.992 mm (2.479-2.480 inch)
Connecting rod journal diameter
49.970-49.990 mm (1.967-1.968 inch)
Crankshaft free end play
0.110-0.232 mm (0.004-0.009 inch)
Crankshaft runout to rear face of cylinder block
0.050 mm (inch) max. (0.001 inch)
Lower cylinder block bolts and studs
Stage 1: Tighten fasteners 1-8 to 25 Nm (18 ft. lbs.).
Stage 2: Tighten fasteners 9-16 to 40 Nm (30 ft. lbs.).
Stage 3: Tighten fasteners 1-16 90 degrees.
Stage 4: Tighten fasteners 17-22 to 25 Nm (18 ft. lbs.).
Main bearings
Clearance to crankshaft-desired
0.025-0.045 mm (0.0009-0.0017 inch)
Clearance to crankshaft-allowable
0.025-0.050 mm (0.0009-0.0019 inch)
Bearing wall thickness-grade 1 2.497 mm (0.0983 inch)
Bearing wall thickness-grade 2 2.501 mm (0.0985 inch)
Bearing wall thickness-grade 3 2.505 mm (0.0986 inch
Connecting Rod Bearing
Connecting rod bearings
Clearance to crankshaft
0.028-0.066 mm (0.001-0.0025 inch)
Bearing wall thickness (std.) d 1.503 mm (0.059 inch)
Connecting Rod
Piston pin bore diameter
21.017-21.031 mm (0.827-0.828 inch)
Crankshaft bearing bore diameter
53.015-53.035 mm (2.0872-2.0879 inch)
Length (center to center) 138.06-138.14 mm (5.435-5.438 inch)
Alignment (bore to bore max. difference) e
Twist 0.050 mm per 25 (0.0019 per 0.984 inch)
Bend 0.038 mm per 25 (0.0014 per 0.984 inch)
Side clearance (assembled to crank)
Standard 0.100-0.30 mm (0.0039-0.0118 inch)
Service limit 0.35 mm (0.0013inch) max.
Connecting rod cap bolts
Stage 1: Tighten to 23 Nm (17 ft. lbs.).
Stage 2: Tighten to 43 Nm (32 ft. lbs.).
e Pin bore and crank bearing bore must be parallel and in same vertical plane within the specified total difference when measured at the ends of a 203 mm bar, 101.5 mm on each side of rod centerline.
d 0.250 mm Undersize-Add 0.125 mm to standard or grade 2 thickness.
Piston, Engine
Piston
Piston diameter
Coated grade 1 88.990-89.010 mm (3.5035-3.5043 inch)
Coated grade 2 88.998-89.022 mm (3.5039-3.5048 inch)
Coated grade 3 89.010-89.030 mm (3.5043-3.5051 inch)
Uncoated grade 1 88.970-88.980 mm (3.50275-3.50314 inch)
Uncoated grade 2 88.978-88.992 mm (3.50306-3.50362 inch)
Uncoated grade 3 89.010-89.030 mm (3.50432-3.50511 inch)
Piston-to-bore clearance
0.012 to 0.022 mm (0.0005-0.0009 inch)
Pin bore diameter (piston)
21.008-21.012 mm (0.8270-0.8272 inch)
Piston Ring, Engine
Ring groove width
Compression (top) 1.230-1.245 mm (0.0484-0.0490 inch)
Compression (bottom)1.530-1.545 mm (0.0602-0.0608 inch)
Oil ring 3.030-3.055 mm (0.1192-0.1203 inch)
Piston pin
Length 60.51-60.08 mm (2.382-2.365 inch)
Diameter 21.011-21.013 mm (0.0013 inch)
Pin-to-piston clearance
-0.005 to +0.001 mm (0.0001-0.00003 inch)
Pin-to-rod clearance
Standard 0.004-0.020 mm (0.0001-0.0007 inch)
Service limit 0.035 mm (0.0013 inch)
Piston Ring-To-Groove Clearance
Compression (top) 0.040-0.075 mm (0.0015-0.0029 inch)
Compression (bottom) 0.040-0.085 mm (0.0015-0.0033 inch)
Oil ring Snug Fit
Piston ring gap g
Compression (top)-gauge diameter 0.100-0.250 mm (0.0039-0.0098 inch)
Compression (bottom)-gauge diameter 0.27-0.42 mm (0.0106-0.0165 inch)
Oil ring (steel rail)-gauge diameter 0.15-0.65 mm (0.0059-0.0255 inch)
Compression (top)-service limit 0.50 mm (0.0196 inch) max.
Compression (bottom)-service limit 0.65 mm (0.0255 inch) max.
Oil ring (steel rail)-service 1imit 0.90 mm (0.0354 inch) max.
g Specification 82.4 mm (3.2441 inch) diameter gauge.
Piston Pin, Engine
Piston pin bore diameter
21.017-21.031 mm (0.827-0.828 inch)
Crankshaft bearing bore diameter
53.015-53.035 mm (2.0872-2.0879 inch)
Length (center to center) 138.06-138.14 mm (5.435-5.438 inch)
Alignment (bore to bore max. difference) e
Twist 0.050 mm per 25 (0.0019 per 0.984 inch)
Bend 0.038 mm per 25 (0.0014 per 0.984 inch)
Side clearance (assembled to crank)
Standard 0.100-0.30 mm (0.0039-0.0118 inch)
Service limit 0.35 mm (0.0013inch) max.
e Pin bore and crank bearing bore must be parallel and in same vertical plane within the specified total difference when measured at the ends of a 203 mm bar, 101.5 mm on each side of rod centerline.
Crankshaft, Engine
Crankshaft
Main bearing journal diameter 62.968-62.992 mm (2.479-2.480 inch)
Connecting rod journal diameter
49.970-49.990 mm (1.967-1.968 inch)
Crankshaft free end play
0.110-0.232 mm (0.004-0.009 inch)
Crankshaft runout to rear face of cylinder block
0.050 mm (inch) max. (0.001 inch)
Lower cylinder block bolts and studs
Stage 1: Tighten fasteners 1-8 to 25 Nm (18 ft. lbs.).
Stage 2: Tighten fasteners 9-16 to 40 Nm (30 ft. lbs.).
Stage 3: Tighten fasteners 1-16 90 degrees.
Stage 4: Tighten fasteners 17-22 to 25 Nm (18 ft. lbs.).
Main bearings
Clearance to crankshaft-desired
0.025-0.045 mm (0.0009-0.0017 inch)
Clearance to crankshaft-allowable
0.025-0.050 mm (0.0009-0.0019 inch)
Bearing wall thickness-grade 1 2.497 mm (0.0983 inch)
Bearing wall thickness-grade 2 2.501 mm (0.0985 inch)
Bearing wall thickness-grade 3 2.505 mm (0.0986 inch
Connecting Rod Bearing
Connecting rod bearings
Clearance to crankshaft
0.028-0.066 mm (0.001-0.0025 inch)
Bearing wall thickness (std.) d 1.503 mm (0.059 inch)
Connecting Rod
Piston pin bore diameter
21.017-21.031 mm (0.827-0.828 inch)
Crankshaft bearing bore diameter
53.015-53.035 mm (2.0872-2.0879 inch)
Length (center to center) 138.06-138.14 mm (5.435-5.438 inch)
Alignment (bore to bore max. difference) e
Twist 0.050 mm per 25 (0.0019 per 0.984 inch)
Bend 0.038 mm per 25 (0.0014 per 0.984 inch)
Side clearance (assembled to crank)
Standard 0.100-0.30 mm (0.0039-0.0118 inch)
Service limit 0.35 mm (0.0013inch) max.
Connecting rod cap bolts
Stage 1: Tighten to 23 Nm (17 ft. lbs.).
Stage 2: Tighten to 43 Nm (32 ft. lbs.).
e Pin bore and crank bearing bore must be parallel and in same vertical plane within the specified total difference when measured at the ends of a 203 mm bar, 101.5 mm on each side of rod centerline.
d 0.250 mm Undersize-Add 0.125 mm to standard or grade 2 thickness.