Engine Mechanical Specifications

Displacement 3.8L (231 cu in)
Bore 96.52 mm (3.8 in)
Stroke 86.36 mm (3.4 in)
Compression Ratio VIN K - @ 4 Compression Strokes 9.4:1
Compression Ratio VIN 1 - @ 4 Compression Strokes 8.5:1
Crankshaft Rear Oil Seal Housing Bolt
First Pass 15 N.m (11 lb ft)
Final Pass 50 degrees
Block
Balance Shaft Bearing Bore Diameter - Front 51.973-51.999 mm (2.0462-2.0472 in)
Balance Shaft Bearing Inside Diameter - Rear 38.118-38.194 mm (1.5007-1.5037 in)
Balance Shaft Bearing Bore Diameter - Rear, In Block 47.584-47.612 mm (1.8735-1.8745 in)
Crankshaft Main Bearing Bore Diameter 68.249-68.270 mm (2.6870-2.6878 in)
Crankshaft Main Bearing Clearance - #1 0.0178-0.0406 mm (0.0007-0.0016 in)
Crankshaft Main Bearing Clearance - #2, 3 and 4 0.0229-0.0457 mm (0.0009-0.0018 in)
Cylinder Bore Diameter 98.5 mm (3.8 in)
Cylinder Bore Out-of-Round - Diametral 0.0254 mm (0.001 in)
Cylinder Bore Taper 0.0254 mm (0.001 in)
Cylinder Head Deck Height 216.459 mm (8.522 in)
Cylinder Head Deck Surface Flatness - Overall 0.0762 mm (0.003 in)
Connecting Rod
Connecting Rod Bearing Clearance 0.0127-0.0660 mm (0.0005-0.0026 in)
Connecting Rod Bore Diameter 60.295-60.312 mm (2.37378-2.3745 in)
Connecting Rod Length - Center to Center - S/C 143.205-143.307 mm (5.638-5.642 in)
Connecting Rod Length - Center to Center - Non S/C 145.796-145.898 mm (5.740-5.744 in)
Connecting Rod Side Clearance 0.102-0.508 mm (0.004-0.0200 in)
Cylinder Head Height/Thickness 103.492-104.178 mm (4.0745-4.1015 in)
Surface Finish 0.0032 mm (0.000125 in)
Surface Flatness - Block Deck 0.1016 mm (0.004 in)
Crankshaft
Connecting Rod Journal Diameter 57.1170-57.1475 mm (2.2487-2.2499 in)
Connecting Rod Journal Out-of-Round 0.00508 mm (0.00020 in)
Connecting Rod Journal Taper 0.00889 mm (0.00035 in)
Crankshaft End Play 0.076-0.276 mm (0.003-0.011 in)
Crankshaft Main Bearing Clearance - #1 0.0178-0.0406 mm (0.0007-0.0016 in)
Crankshaft Main Bearing Clearance - #2, 3 and 4 0.0229-0.0457 mm (0.0009-0.0018 in)
Crankshaft Main Journal Diameter 63.470-63.495 mm (2.4988-2.4998 in)
Crankshaft Main Journal Out-of-Round 0.00635 mm (0.00025 in)
Crankshaft Main Journal Taper 0.00889 mm (0.00035 in)
Crankshaft Rear Flange Runout 0.05 mm (0.002 in)
Crankshaft Runout - from Main 2 & 3 to 1 & 4 0.076 mm (0.003 in)
Piston Ring End Gap
First Compression Ring 0.25-0.46 mm (0.010-0.018 in)
Second Compression Ring 0.58-0.84 mm (0.023-0.033 in)
Oil Control Ring 0.254-0.762 mm (0.010-0.030 in)
Piston Ring to Groove Clearance
First Compression Ring 0.033-0.079 mm (0.0013-0.0031 in)
Second Compression Ring 0.033-0.079 mm (0.0013-0.0031 in)
Oil Control Ring 0.023-0.201 mm (0.0009-0.0079 in)
Piston Ring Thickness
First Compression Ring 1.176-1.197 mm (0.0463-0.0471 in)
Second Compression Ring 1.1476-1.497 mm (0.0581-0.0589 in)
Oil Control Ring 1.854-2.007 mm (0.073-0.079 in)
Pistons and Pins - Piston
Piston Diameter - Production - S/C 96.489-96.528 mm (3.7988-3.8003 in)
Piston Diameter - Production - Non S/C 96.482-96.497 mm (3.7985-3.7991 in)
Piston Diameter - Service Limit - Minimum - S/C 96.434 mm (3.7966 in)
Piston Diameter - Service Limit - Minimum - Non S/C 96.442 mm (3.7969 in)
Piston Pin Bore Diameter - S/C 23.0065-23.0105 mm (0.9058-0.9059 in)
Piston Pin Bore Diameter - Non S/C 22.0060-22.0110 mm (0.8664-0.8666 in)
Piston to Bore Clearance - New - VIN K 0.010-0.051 mm (0.0004-0.0020 in)
Piston to Bore Clearance - Used - VIN K 0.050-0.091 mm (0.0020-0.0036 in)
Piston to Bore Clearance - New - VIN 1 - 0.0207-0.0437 mm (-0.0008-0.0018 in)
Piston to Bore Clearance - Used VIN 1 0.0193-0.0997 mm (0.0008-0.0039 in)
Pistons and Pins - Pin
Piston Pin Clearance to Connecting Rod Bore - Press Fit - VIN K 0.0066-0.0217 mm (0.0003-0.0009 in)
Piston Pin Clearance to Piston Pin Bore - VIN K 0.0020-0.0130 mm (0.00008-0.00051 in)
Piston Pin Diameter - VIN K 21.9950-22.000 mm (0.8659-0.8661 in)
Piston Pin Clearance to Connecting Rod Bore - Press Fit - VIN 1 0.0073-0.0225 mm (0.00029-0.00089 in)
Piston Pin Clearance to Piston Pin Bore - VIN 1 0.0065-0.0155 mm (0.00061-0.00026 in)
Piston Pin Diameter - VIN 1 22.995-23.000 mm (0.90531-0.90551 in)