Cylinder Block Assembly: Specifications
4.0L SOHCCylinder Block
Cylinder Bore Diameter 100.4 mm (3.953 inch)
Maximum Cylinder Out-of-Round 0.025 mm (0.001 inch)
Maximum Cylinder Taper 0.025 mm (0.001 inch)
Main Bearing Bore Diameter 60.634 - 60.620 mm (2.387 - 2.387 inch)
Crankshaft to Rear Face of Block Runout TIR Maximum 0.127 mm (0.005 inch)
Crankshaft and Flywheel
Main Bearing Journal Diameter 56.980 - 57.0 mm (2.243 - 2.244 inch)
Main Bearing Journal Runout Limit 0.05 mm (0.002 inch)
Main Bearing Journal Taper Maximum Per Inch 0.008 mm (0.0003 inch)
Connecting Rod Journal Maximum Out-of-Round 0.008 mm (0.0003 inch)
Crankshaft Free End Play 0.05 - 0.32 mm (0.002 - 0.0126 inch)
Main Bearing Journal Out-of-Round 0.008 mm (0.0003 inch)
Main Bearing Journal Runout TIR Maximum 0.05 mm (0.002 inch)
Main Bearing Journal Runout Service Limit 0.0127 mm (0.005 inch)
Main Bearing Thrust Face Runout TIR Maximum 0.0254 mm (0.010 inch)
Thrust Bearing Journal Length 26.39 - 26.44 mm(1.039 - 1.041 inch)
Main and Rod Bearing Journal Finish Maximum 72 and 88 RMS
Main Bearing Thrust Face Finish Maximum 20 RMS
Connecting Rod Journal Diameter 53.98 - 54.0 mm (2.125 - 2.126 inch)
Connecting Rod Journal Taper Per Inch Maximum 0.008 mm (0.0003 inch)
Connecting Rod Bearings
Clearance to Crankshaft Desired 0.008 - 0.061 mm (0.0003 - 0.0024 inch)
Clearance to Crankshaft Allowable 0.013 - 0.048 mm (0.0005 - 0.002 inch)
Bearing Wall Thickness 1.4 - 1.408 mm (0.0551 - 0.0554) inch
Main Bearings
Clearance to Crankshaft 0.021 - 0.039 mm (0.0008 - 0.0015 inch)
Clearance to Crankshaft Allowable 0.013 - 0.048 mm (0.0005 - 0.002 inch)
Bearing Wall Thickness 1.8 - 1.806 mm (0.0709 - 0.0711 inch)
Connecting Rod, Piston and Rings
Side Clearance (Assembled to Crankshaft) 0.092 - 0.268 mm (0.0036 - 0.0106 inch)
Piston Pin Bore or Bushing I.D. 23.958 - 23.976 mm (0.943 - 0.944 inch)
Rod Bearing Bore I.D.
56.82 mm (2.237 inch)
56.84 mm (2.238 inch)
Rod Bearing Bore Out-of-Round 0.01 mm (0.0004 inch)
Rod Length Center to Center 145.965 - 146.035 mm (5.746 - 5.749 inch)
Alignment (Bore-to-Bore Maximum Diff.) Twist 0.038 mm per 25.4 mm (0.0015 inch per 1.000 inch)
Alignment (Bore-to-Bore Maximum Diff.) Bend 0.0125 mm per 25.4 (0.00049 inch per 1.00)
Piston Pin Length 72.0 - 72.8 mm (2.835 - 2.866 inch)
To Piston Pin Bore Clearance 0.01 - 0.016 mm (0.0004 - 0.0006 inch)
To Connecting Rod Bushing Clearance Press Fit -0.018 to -0.042 mm (-0.0007 to -0.0017 inch)
Piston Bore Clearance Selective Fit 0.030 - 0.050 mm (0.0012 - 0.002 inch)
Diameter-Coded STD 100.380 - 100.400 mm (3.952 - 3.9528 inch)
Diameter-Coded0.5 mm 100.880 - 100.900 mm (3.971 - 3.972 inch)
Diameter-Coded 1.0 101.350 - 101.370 mm (3.990 - 3.991 inch)
Top Ring Groove Width 1.23 - 1.25 mm (0.0484 - 0.0492 inch)
Bottom Ring Groove Width 1.52 - 1.54 mm (0.0598 - 0.0606 inch)
Oil Ring Groove Width 3.01 - 3.03 mm (0.1185 - 0.1193 inch)
Piston Rings
Top Compression Ring Width 1.175 - 1.190 mm (0.0463 - 0.0469 inch)
Bottom Compression Ring Width 1.475 - 1.490 mm (0.0581 - 0.01587 inch)
Top Compression Side Clearance 0.040 - 0.075 mm (0.0016 - 0.0030 inch)
Bottom Compression Side Clearance 0.030 - 0.065 mm (0.0012 - 0.0026 inch)
Top Compression Ring Gap 0.200 - 0.450 mm (0.008 - 0.018 inch)
Bottom Compression Ring Gap 0.40 - 0.60 mm (0.015 - 0.024 inch)
Torque Specifications
Intake Manifold Bolts 10 Nm (89 inch lbs.)
Jackshaft Chain Guide Bolts 19 Nm (14 ft. lbs.)
Jackshaft Chain Tensioner Bolts 10 Nm (89 inch lbs.)
Jackshaft Thrust Plate Bolts 11 Nm (8 ft. lbs.)
Main Bearing Cap Bolts 97 Nm (72 ft. lbs.)
For crankshaft main bearing tightening sequence refer to Assembly procedure Service and Repair