General
| Displacement | 4.2 liters | |||
| Number of cylinders | 6 | |||
| Bore | 3.81 inch | |||
| Stroke | 3.74 inch | |||
| Firing order | 1-4-2-5-3-6 | |||
| Compression ratio | 9.26:1 | |||
| Oil capacity with oil filter | 6.0 qt. | |||
| Oil pressure (hot 2500 rpm) | 40-125 psi | |||
| Valve stem diameter exhaust | 0.3418-0.3410 inch | |||
| Valve spring installed length | 1.566-1.637 inch | |||
| Valve Spring Free Length | Intake | 1.99 inch | ||
| Exhaust | 1.99 inch | |||
| Valve gap with collapsed tappet | 0.08465-0.18465 inch | |||
| Camshaft Specifications | Lobe Lift | Intake | 0.245 inch | |
| Exhaust | 0.259 inch | |||
| Lobe Wear Limit | Intake | 0.005 inch | ||
| Exhaust | 0.005 inch | |||
| End play wear limit | 0.001-0.006 inch | |||
| Journal -to -bearing clearance | 0.001-0.0006 inch | |||
| Runout | 0.002 inch | |||
| Journal diameter | 2.0515-2.0505 inch | |||
| Out-of-round limit | 0.001 inch | |||
| Cylinder Block Specifications | Head gasket surface flatness per 0.08 mm (0.003 in) | 6.00 inch | ||
| Cylinder Bore Diameter | Standard | 3.81 inch | ||
| Out-of-round | 0.002 inch | |||
| Taper limit | 0.002 inch | |||
| Crankshaft Specifications | Main Journal Diameter | Standard | 2.5190-2.5198 inch | |
| 0.25 mm 0.010 inch undersize | 2.5182-2.5190 inch | |||
| Out-of-round limit | 0.0012 inch | |||
| Taper limit | 0.0006 inch | |||
| Runout | 0.002 inch | |||
| Connecting Rod Journal Diameter | Standard | 2.3103-2.3111 inch | ||
| 0.25 mm (0.010 inch) undersize | 2.3095-2.3103 inch | |||
| 0.50 mm (0.020 inch) undersize trim | 2.3083-2.3091 inch | |||
| Taper limit | 0.0006 inch | |||
| Out-of-round limit | 0.0012 inch | |||
| Crankshaft end play | 0.00003-0.00787 inch | |||
| Connecting Rod Specifications | Bend for each 25 mm (1.97 inches) | 0.0015 inch | ||
| Side clearance maximum | 0.0047-0.01929 inch 0.014 inch Max | |||
| Piston Specifications | Piston Diameter | Standard | 3.81 inch | |
| Piston-to-bore clearance | 0.000709-0.00173 inch | |||
| Piston ring to land clearance | 0.00122-0.00315 inch | |||
| Compression ring | top | 0.060-0.059 inch | ||
| bottom | 0.060-0.059 inch | |||
| Ring Gap | Compression ring | top | 0.00098-0.00161 inch | |
| bottom | 0.00149-0.0025 inch | |||
| Oil ring | 0.0059-0.0064 inch | |||
| Lubrication System Specifications | Oil Pump | Oil pump gear radial clearance (idler and drive) (inch) | 0.0055-0.002 | |
| Oil pump gear end height (extends below housing) (inch) | 0.0033-0.0004 | |||
| Oil Capacity | With oil filter | 6.5-7 qt. | ||
| Without oil filter | 5 qt. | |||
| Total (dry engine) | 6 qt. | |||
| Type Oil | Super Premium SAE 5W-20 Motor Oil |