Engine 4.0L: Specifications: Engine
Engine Specifications
| DESCRIPTION | SPECIFICATION |
|---|---|
| Engine Type | In-line 6 Cylinder |
| Bore and Stroke | 98.4 x 86.69 mm (3.88 x 3.413 in.) |
| Displacement | 4.0L (242 cu. in.) |
| Compression Ratio | 8.8:1 |
| Firing Order | 1-5-3-6-2-4 |
| Lubrication | Pressure Feed-Full Flow Filtration |
| Cooling System | Liquid Cooled-Forced Circulation |
| Cylinder Block | Cast Iron |
| Crankshaft | Cast Nodular Iron |
| Cylinder Head | Cast Iron |
| Camshaft | Cast Iron |
| Pistons | Aluminum Alloy |
| Combustion Chamber | Dual-Quench |
| Connecting Rods | Cast Malleable Iron |
| CAMSHAFT | |
| Hydraulic Tappet Clearance | Zero Lash |
| Bearing Clearance | 0.025 to 0.076 mm (0.001 to 0.003 in.) |
| Bearing Journal Diameter | |
| No. 1 | 51.54 to 51.56 mm (2.029 to 2.030 in.) |
| No. 2 | 51.28 to 51.31 mm (2.019 to 2.020 in.) |
| No. 3 | 51.03 to 51.05 mm (2.009 to 2.010 in.) |
| No. 4 | 50.78 to 50.80 mm (1.999 to 2.000 in.) |
| Base Circle Runout (MAX) | 0.03 mm (0.001 in.) |
| Valve Lift | |
| Intake | 10.350 mm (0.4075 in.) |
| Exhaust | 10.528 mm (0.4145 in.) |
| Valve Timing | |
| Intake | |
| Opens | 12.4° BTDC |
| Closes | 60.9° ABDC |
| Exhaust | |
| Opens | 49.8 BBDC |
| Closes | 29.2° ATDC |
| Valve Overlap | 41.6° |
| Intake Duration | 253.3° |
| Exhaust Duration | 259.° |
| CRANKSHAFT | |
| End Play | 0.038 to 0.165 mm (0.0015 to 0.0065 in.) |
| Main Bearing Journal Diameter | |
| No. 1-6 | 63.489 to 63.502 mm (2.4996 to 2.5001 in.) |
| No. 7 | 63.449 to 63.487 mm (2.4980 to 2.4995 in.) |
| Main Bearing Journal Width | |
| No. 1 | 27.58 to 27.89 mm (1.086 to 1.098 in.) |
| No. 3 | 32.28 to 32.33 mm (1.271 to 1.273 in.) |
| No. 2-4-5-6-7 | 30.02 to 30.18 mm (1.182 to 1.188 in.) |
| Main Bearing Clearance | 0.03 to 0.06 mm (0.001 to 0.0025 in.) |
| Preferred | 0.051 mm (0.002 in.) |
| Connecting Rod Journal Diameter | 53.17 to 53.23 mm (2.0934 to 2.0955 in.) |
| Connecting Rod Journal Width | 27.18 to 27.33 mm (1.070 to 1.076 in.) |
| Out-of-Round (MAX) | 0.013 mm (0.0005 in.) |
| Taper (MAX) | 0.013 mm (0.0005 in.) |
| CYLINDER BLOCK | |
| Deck Height | 240.03 to 240.18 mm (9.450 to 9.456 in.) |
| Deck Clearance (Below Block) | 0.546 mm (0.0215 in.) |
| Cylinder Bore Diameter | |
| Standard | 98.45 to 98.48 mm (3.8759 to 3.8775 in.) |
| Taper | 0.025 mm (0.001 in.) |
| Out-of-Round | 0.025 mm (0.001 in.) |
| Tappet Bore Diameter | 23.000 to 23.025 mm (0.9055 to 0.9065 in.) |
| Flatness | 0.03 mm per 25 mm (0.001 in. per 1 in.) 0.05 mm per 152 mm (0.002 in. per 6 in.) |
| Flatness Max. | 0.20 mm max. for total length (0.008 in. max. for total length) |
| Main Bearing Bore Diameter | 68.3514 to 68.3768 mm (2.691 to 2.692 in.) |
| CONNECTING ROD | |
| Total Weight (Less Bearing) | 663 to 671 grams (23.39 to 23.67 oz.) |
| Length (Center-to-Center) | 155.52 to 155.62 mm (6.123 to 6.127 in.) |
| Piston Pin Bore Diameter | 23.59 to 23.62 mm (0.9288 to 0.9298 in.) |
| Bore (Less Bearings) | 56.08 to 56.09 mm (2.2080 to 2.2085 in.) |
| Bearing Clearance | 0.025 to 0.076 mm (0.001 to 0.003 in.) |
| Preferred | 0.044 to 0.050 mm (0.0015 to 0.0020 in.) |
| Side Clearance | 0.25 to 0.48 mm (0.010 to 0.019 in.) |
| Twist (Max.) | 0.002 mm per mm (0.002 in. per inch) |
| Bend (Max.) | 0.002 mm per mm (0.002 in. per inch.) |
| CYLINDER COMPRESSION PRESSURE | |
| Pressure Range | 827 to 1,034 kPa (120 to 150 psi) |
| Max. Variation Between Cylinders | 206 kPa (30 psi) |
| CYLINDER HEAD | |
| Combustion Chamber | 55.22 to 58.22 cc (3.37 to 3.55 cu. in.) |
| Valve Guide I.D. (Integral) | 7.95 to 7.97 mm (0.313 to 0.314 in.) |
| Valve Stem-to-Guide Clearance | 0.025 to 0.076 mm (0.001 to 0.003 in.) |
| Valve Seat Angle | |
| Intake | 44.5° |
| Exhaust | 44.5° |
| Valve Seat Width | 1.02 to 1.52 mm (0.040 to 0.060 in.) |
| Valve Seat Runout | 0.064 mm (0.0025 in.) |
| Flatness | 0.03 mm per 25 mm (0.001 in. per 1 in.) |
| 0.05 mm per 152 mm (0.002 in. per 6 in.) | |
| Flatness Max. | 0.20 mm - max. for total length (0.008 in. max. for total length) |
| ROCKER ARMS, PUSH RODS & TAPPETS | |
| Rocker Arm Ratio | 1.6:1 |
| Push Rod Length (Pink) | 244.856 to 245.364 mm (9.640 to 9.660 in.) |
| Push Rod Diameter | 7.92 to 8.00 mm (0.312 to 0.315 in.) |
| Hydraulic Tappet Diameter | 22.962 to 22.974 mm (0.904 to 0.9045 in.) |
| Tappet-to-Bore Clearance | 0.025 to 0.063 mm (0.001 to 0.0025 in.) |
| VALVES | |
| Valve Length (Overall) | |
| Intake | 122.479 to 122.860 mm (4.822 to 4.837 in.) |
| Exhaust | 122.860 to 123.241 mm (4.837 to 4.852 in.) |
| Valve Stem Diameter | 7.899 to 7.925 mm (0.311 to 0.312 in.) |
| Stem-to-Guide Clearance | 0.025 to 0.076 mm (0.001 to 0.003 in.) |
| Valve Head Diameter | |
| Intake | 48.387 to 48.641 mm (1.905 to 1.915 in.) |
| Exhaust | 37.973 to 38.227 mm (1.495 to 1.505 in.) |
| Valve Face Angle | |
| Intake | 46.5° |
| Exhaust | 46.5° |
| Tip Refinishing (Max. Allowable) | 0.25 mm (0.010 in.) |
| VALVE SPRINGS | |
| Free Length (Approx.) | 47.65 mm (1.876 in.) |
| Spring Load | |
| Valve Closed | 316 to 351 N @ 41.656 mm (71 to 79 lbf. @ 1.64 in.) |
| Valve Open | 898.6 to 969.7 N @ 30.89 mm (202 to 218 lbf @ 1.216 in.) |
| Inside Diameter | 21.0 mm to 21.51 mm (0.827 to 0.847 in.) |
| Installed Height | 41.656 mm (1.64 in.) |
| PISTONS | |
| Weight (Less Pin) | 417 to 429 grams (14.7 to 15.1 oz.) |
| Piston Pin Bore (Centerline to Piston Top) | 40.61 to 40.72 mm (1.599 to 1.603 in.) |
| Piston-to-Bore Clearance | 0.018 to 0.038 mm (0.0008 to 0.0015 in.) |
| Ring Gap Clearance | |
| Top Compression Ring | 0.229 to 0.610 mm (0.0090 to 0.0240 in.) |
| 2nd Compression Ring | 0.483 to 0.965 mm (0.0190 to 0.0380 in.) |
| Oil Control Steel Rails | 0.254 to 1.500 mm (0.010 to 0.060 in.) |
| Ring Side Clearance | |
| Compression Rings | 0.042 to 0.084 mm (0.0017 to 0.0033 in.) |
| Oil Control Rings | 0.06 to 0.21 mm (0.0024 to 0.0083 in.) |
| Piston Ring Groove Height | |
| Compression Rings | 1.530 to 1.555 mm (0.0602 to 0.0612 in.) |
| Oil Control Ring | 4.035 to 4.060 mm (0.1589 to 0.1598 in.) |
| Piston Ring Groove Diameter | |
| No.1 Compression Ring | 88.39 to 88.65 mm (3.48 to 3.49 in.) |
| No.2 Compression Ring | 87.63 to 87.88 mm (3.45 to 3.46 in.) |
| Oil Control Ring | 89.66 to 89.92 mm (3.53 to 3.54 in.) |
| Piston Pin Bore Diameter | 23.650 to 23.658 mm (0.9312 to 0.9315 in.) |
| Piston Pin Diameter | 23.637 to 23.640 mm (0.9306 to 0.9307 in.) |
| Piston-to-Pin Clearance | 0.0102 to 0.0208 mm (0.0005 to 0.0009 in.) |
| Piston-to-Pin Connecting Rod (Press Fit) | 8.9 kN (2000 lbf.) |
| OIL PUMP | |
| Gear-to-Body Clearance (Radial) | 0.051 to 0.102 mm (0.002 to 0.004 in.) |
| Gear-to-Body Clearance (Radial) Preferred | 0.051 mm (0.002 in.) |
| Gear End Clearance Plastigage | 0.051 to 0.152 mm (0.002 to 0.006 in.) |
| Gear End Clearance Plastigage (Preferred) | 0.051 mm (0.002 in.) |
| Gear End Clearance Feeler Gauge | 0.1016 to 0.2032 mm (0.004 to 0.008 in.) |
| Gear End Clearance Feeler Gauge (Preferred) | 0.1778 mm (0.007 in.) |
| Oil Pressure | |
| At Idle Speed | 89.6 kPa (13 psi) |
| At 1600 rpm & Higher | 255 to 517 kPa (37 to 75 psi) |
| Oil Pressure Relief | 517 kPa (75 psi) |