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General Specifications

GENERAL SPECIFICATIONS

Item Specification
Lubricants and Sealants 
SAE 5W-20 Premium Synthetic Blend Motor Oil (XO-5W20-QSP) WSS-M2C153-H
Pipe Sealant with Teflon® D8AZ-19554-A ESR-M18P7-A
Silicone Gasket and Sealant F7AZ-19554-EA WSE-M4G323-A4
Metal Surface Cleaner F4AZ-19A536-RA WSE-M5B392-A


GENERAL SPECIFICATIONS

Item Specification
Engine 
Displacement 3.9L
Number of cylinders 6
Bore 96.82 mm (3.81 in)
Stroke 88.0 mm (3.46 in)
Firing order 1-4-2-5-3-6
Oil pressure (HOT 2,500 RPM) 40-125 psi
Oil Capacity 5.0 quarts total
Compression ratio 9.35:1
Cylinder Head and Valve Train 
Cylinder head gasket surface flatness 0.18 mm (0.007 in)
Combustion chamber volume (cc) 61.5-64.5
Valve arrangement (front to rear) LH:E, I E, I, E, I
RH: I, E, I, E, I, E
Valve guide bore diameter intake and exhaust 7.015-7.044 mm (0.276-0.277 in)
Valve stem diameter - intake (standard) 6.975-6.995 mm (0.2746-0.2754 in)
Valve stem diameter - exhaust (standard) 6.949-6.970 mm (0.2735-0.2744 in)
Valve stem diameter - intake (oversize) 9.075-9.055 mm (0.3573-0.3565 in)
Valve stem diameter - exhaust (oversize) 9.063-9.043 mm (0.3568-0.3560 in)
Valve stem diameter - intake (oversize) 9.456-9.436 mm (0.3723-0.3715 in)
Valve stem diameter - exhaust (oversize) 9.444-9.424 mm (0.3718-0.3710 in)
Valve stem-to-guide clearance - intake 0.020-0.069 mm (0.0008-0.0027 in)
Valve stem-to-guide clearance - exhaust 0.045-0.095 mm (0.0018-0.0037 in)
Valve head diameter - intake 47.27 mm (1.86 in)
Valve head diameter - exhaust 37.1 mm (1.46 in)
Valve face runout 0.05 mm (0.002 in)
Valve face angle 45.675 degrees
Valve seat width 1.5-2.0 mm (0.06-0.08 in)
Valve seat runout (T.I.R.) 0.076 mm (0.003 in)
Valve seat angle 44.75 degrees
Valve spring free length 50.7 mm
Valve spring squareness 1.2 mm
Valve spring compression pressure (valve open, without damper) 1000 N (224 lb) @ 29.2 mm (1.16 in)
Valve spring compression pressure (valve closed, without damper) 350 N (79 lb) @ 40.7 mm (1.62 in)
Valve spring installed height 40.7 mm (1.62 in)
Valve spring installed pressure 350 N (79 lb) @ 40.7 mm (1.62 in)
Rocker arm ratio 1.73
Hydraulic Roller Lifter 
Diameter (Std) 22.195-22.212 mm (0.8738-0.8745 in)
Clearance-to-bore 0.018-0.068 mm (0.0007-0.0027 in)
Service limit 0.127 mm (0.005 in)
Hydraulic leakdown rate 20-100 seconds
Collapsed lash adjuster gap - intake 2.15-4.69 mm (0.089-0.189 in)
Collapsed lash adjuster gap - exhaust 2.15-4.69 mm (0.089-0.189 in)
Camshaft 
Theoretical valve lift @ 0 lash - intake 10.78 mm (0.424 in)
Theoretical valve lift @ 0 lash - exhaust 11.41 mm (0.449 in)
Lobe lift - intake 6.223 mm (0.245 in)
Lobe lift - exhaust 6.575 mm (0.259 in)
Allowable lobe lift loss 0.127 mm (0.005 in)
Journal diameter 52.082-52.108 mm (2.0505-2.0515 in)
Camshaft journal bore inside diameter - intake 47.097 mm (1.8542 in)
Camshaft journal bore inside diameter - exhaust 39.739 mm (1.5645 in)
Camshaft journal-to-bearing clearance 0.025-0.076 mm (0.001-0.003 in)
Camshaft bearing runout 0.127 mm
End play 0.025-0.150 mm (0.001-0.006 in)
Cylinder Block 
Cylinder bore diameter 96.82 mm (3.81 in)
Cylinder bore diameter surface finish 0.2-0.6 "MU" (RMS)
Cylinder bore maximum out-of-round limit 0.025 mm (0.001 in)
Cylinder bore maximum taper 0.050 mm (0.002 in)
Cylinder bore maximum out-of-round service limit 0.127 mm (0.005 in)
Cylinder bore maximum taper service limit 0.254 mm (0.010 in)
Main bearing bore inside diameter 68.905 mm (2.713 in)
68.885 mm (2.712 in)
Camshaft bearing bore inside diameter -
Head gasket surface flatness 0.08 mm (0.003 in) in 152.0 mm (6.00 in)
Crankshaft 
Main bearing journal diameter 1, 2, 3 63.978-63.998 mm (2.5188-2.5196 in)
Main bearing journal maximum taper 0.016 mm D or 0.008 mm R MAX between any two measurement points
Main bearing journal maximum out-of-round 0.0008 mm MAX in 45 degrees, 0.016 mm (0.006 in) TOTAL
Main bearing journal-to-cylinder block clearance - desired 0.025-0.035 mm (0.001-0.0014 in)
Main bearing journal-to-cylinder block clearance - allowable 0.013-0.058 mm (0.0005-0.0023 in)
Connecting rod journal diameter 58.682-58.702 mm (2.3103-2.3111 in)
Connecting rod journal maximum taper 0.016 mm D or 0.008 mm R MAX between any two measurement points
Connecting rod journal maximum out-of-round 0.008 mm (0.0003 in) MAX in 45 degrees, 0.015 mm (0.0006 in) TOTAL
Crankshaft maximum end play 0.010-0.20 mm (0.0004-0.008 in)
Piston  (1)  and Connecting Rod 
Piston diameter - coded red (before coating) 96.795-96.782 mm (3.81082-3.81031 in)
Piston diameter - coded blue (before coating) 96.808-96.795 mm (3.81133-3.81082 in)
Piston diameter - coded yellow (before coating) 96.821-96.808 mm (3.81184-3.81133 in)
Piston-to-cylinder bore clearance (uncoated clearance) 0.018-0.044 mm (0.0007-0.0017 in)
Piston ring end gap - compression (top, in gauge) 0.17-0.33 mm (0.0067-0.0130 in)
Piston ring end gap - compression (bottom, in gauge) 0.3-0.55 mm (0.0118-0.0217 in)
Piston ring end gap - oil ring (steel rail, in gauge) 0.15-0.65 mm (0.0059-0.0256 in)
Piston ring groove width - compression (top) 1.535-1.52 mm (0.0604-0.0598 in)
Piston ring groove width - compression (bottom) 1.54-1.52 mm (0.0606-0.0598 in)
Piston ring groove width - oil 3.05-3.03 mm (0.1200-0.1193 in)
Piston ring width - compression (top) 1.47-1.49 mm (0.0578-0.0587 in)
Piston ring width - compression (bottom) 1.47-1.49 mm (0.0578-0.0587 in)
Piston ring width - oil ring side seal - snug fit
Piston ring-to-groove clearance - 1st ring 0.030-0.065 mm (0.0012-0.0026 in)
Piston ring-to-groove clearance - 2nd ring 0.030-0.070 mm (0.0012-0.0028 in)
Piston pin bore diameter 23.012-23.012 mm (0.9060-0.9061 in)
Piston pin diameter 23.000-23.003 mm (0.9055-0.9056 in)
Piston pin length 63.55-63.05 mm (2.5096-2.4823 in)
Piston pin-to-piston fit 0.009-0.017 mm (0.0004-0.0007 in)
Connecting rod-to-pin clearance press fit 8 kilonewtons (1,800 lb)
Connecting rod pin bore diameter 22.98-22.941 mm (0.9047-0.9032 in)
Connecting rod length (center-to-center) 154.66-154.74 mm (6.08896-6.09211 in)
Connecting rod maximum allowed bend 0.04 per 25 mm (0.0016 per in)
Connecting rod maximum allowed twist 0.05 per 25 mm (0.002 per in)
Connecting rod bearing bore diameter 61.635-61.655 mm (2.4266-2.4274 in)
Connecting rod bearing-to-crankshaft clearance - desired 0.025-0.035 mm (0.001-0.0014 in)
Connecting rod bearing-to-crankshaft clearance - allowable 0.022-0.069 mm (0.00086-0.0027 in)
Connecting rod side clearance - standard 0.11-0.49 mm (0.0047-0.0193 in)
Connecting rod side clearance - service limit 0.49 mm MAX (0.0193 in MAX)
Balance Shaft 
Journal diameter 52.108-52.082 mm (2.0515-2.0505 in)
Bore inside diameter 55.689-55.664 mm (2.192-2.191 in)
Maximum runout 0.025 mm (0.001 in)
End play 0.075-0.200 mm (0.003-0.008 in)
(1) When installing new pistons, measure the cylinder bore as described in ENGINE SYSTEM-GENERAL INFORMATION . Install the service piston matched to the piston bore diameter above.


GENERAL SPECIFICATIONS

Item Specification
Engine 
Displacement 4.2L
Number of cylinders 6
Bore 96.82 mm (3.81 in)
Stroke 95.0 mm (3.8 in)
Firing order 1-4-2-5-3-6
Oil pressure (HOT 2,500 rpm) 40-125 psi
Oil capacity 5.0 quarts total
Compression ratio -
Cylinder Head and Valve Train 
Cylinder head gasket surface flatness 0.18 mm (0.007 in)
Combustion chamber volume 61.5-64.5
Valve arrangement (front to rear) LH: E, I, E, I, E, I
RH:I, E, I, E, I, E
Valve guide bore diameter - intake and exhaust 7.015-7.044 mm (0.276-0.277 in)
Valve stem diameter - intake (standard) 6.975-6.995 mm (0.2746-0.2754 in)
Valve stem diameter - exhaust (standard) 6.949-6.970 mm (0.2735-0.2744 in)
Valve stem diameter - oversize (intake) 9.075-9.055 mm (0.3573-0.3565 in)
Valve stem diameter - oversize (exhaust) 9.063-9.043 mm (0.3568-0.3560 in)
Valve stem diameter - oversize (intake) 9.456-9.436 mm (0.3723-0.3715 in)
Valve stem diameter - oversize (exhaust) 9.444-9.424 mm (0.3718-0.3710 in)
Valve stem-to-guide clearance - intake 0.020-0.069 mm (0.0008-0.0027 in)
Valve stem-to-guide clearance - exhaust 0.045-0.095 mm (0.008-0.0037 in)
Valve head diameter - intake 47.27 mm (1.86 in)
Valve head diameter - exhaust 37.1 mm (1.46 in)
Valve face runout 0.05 mm (0.002 in)
Valve face angle 45.675 degrees
Valve seat width 1.5-2.0 mm (0.06-0.08 in)
Valve seat runout (T.I.R.) 0.076 mm (0.003 in)
Valve seat angle 44.75 degrees
Valve spring free length 50.7 mm (1.99 in)
Valve spring squareness 1.2 mm (0.0472 in)
Valve spring compression pressure (valve open, without damper) 1,000 N (224 lb) @ 29.2 mm (1.16 in)
Valve spring compression pressure (valve closed, without damper) 350 N (79 lb) @ 40.7 mm (1.62 in)
Valve spring installed height 40.7 mm (1.62 in)
Valve spring installed pressure 350 N (79 lb) @ 40.7 mm (1.62 in)
Rocker arm ratio 1.73
Hydraulic Roller Lifter 
Diameter (standard) 22.195-22.212 mm (0.8738-0.8745 in)
Clearance-to-bore 0.018-0.068 mm (0.0007-0.0027 in)
Service limit 0.127 mm (0.005 in)
Hydraulic leakdown rate 20-100 seconds
Collapsed lash adjuster gap (intake and exhaust) 2.15-4.69 mm (0.089-0.189 in)
Camshaft 
Theoretical valve lift @ 0 lash - intake 10.78 mm (0.4244 in)
Theoretical valve lift @ 0 lash - exhaust 11.41 mm (0.4492 in)
Lobe lift - intake 6.223 mm (0.24 in)
Lobe lift - exhaust 6.575 mm (0.26 in)
Allowable lobe lift loss 0.127 mm (0.005 in)
Journal diameter 52.082-52.108 mm (2.0505-2.0515 in)
Camshaft journal bore inside diameter - intake 47.097 mm (1.8542 in) max.
47.072 mm (1.8532 in) min.
Camshaft journal bore inside diameter - exhaust 39.739 mm (1.5645 in) max.
39.714 mm (1.5635 in) min.
Camshaft journal-to-bearing clearance 0.025-0.076 mm (0.001-0.003 in)
Camshaft bearing runout 0.127 mm (0.005 in)
End play 0.025-0.150 mm (0.001-0.006 in)
Cylinder Block 
Cylinder bore diameter 96.812 mm (3.81 in)
Cylinder bore diameter surface finish 0.2-0.6 "MU" (RMS)
Cylinder bore maximum out-of-round limit 0.025 mm (0.001 in)
Cylinder bore maximum taper 0.050 mm (0.002 in)
Cylinder bore maximum out-of-round service limit 0.127 mm (0.005 in)
Cylinder bore maximum taper service limit 0.254 mm (0.010 in)
Main bearing bore inside diameter 68.905 mm (2.713 in) 68.885 mm (2.712 in)
Camshaft bearing bore inside diameter - No. 1 55.689-55.664 mm (2.192-2.191 in)
Camshaft bearing bore inside diameter - No. 2 and No. 3 55.308-55.283 mm (2.177-2.176 in)
Camshaft bearing bore inside diameter - No. 4 55.684-55.664 mm (2.192-2.191 in)
Head gasket surface flatness 0.08 mm (0.003 in) in
152.0 mm (6.00 in)
Crankshaft 
Main bearing journal diameter - 1, 2, 3 63.978-63.998 mm (2.5188-2.5196 in)
Main bearing journal maximum taper 0.016 mm D or 0.008 mm R between any two measurement points
Main bearing journal maximum out-of-round 0.008 mm (0.0003 in) MAX in 45 degrees, 0.016 mm (in) TOTAL
Main bearing journal-to-cylinder block clearance - desired 0.025-0.035 mm (0.001-0.0014 in)
Main bearing journal-to-cylinder block clearance - allowable 0.013-0.058 mm (0.0005-0.0023 in)
Connecting rod journal diameter 58.682-58.702 mm (2.310-2.311 in)
Connecting rod journal maximum taper 0.016 mm D or 0.008 mm R between any two measurement points
Connecting rod journal maximum out-of-round 0.008 mm (0.0003 in) MAX in 45 degrees, 0.016 mm (0.006 in) Total
Crankshaft maximum end play 0.10-0.20 mm (0.004-0.008 in)
Piston and Connecting Rod 
Piston diameter - coded red (before coating) 96.795-96.782 mm (3.81082-3.81031 in)
Piston diameter - coded blue (before coating) 96.808-96.795 mm (3.81133-3.81082 in)
Piston diameter - coded yellow (before coating) 96.821-96.808 mm (3.81184-3.81133 in)
Piston-to-cylinder bore clearance (uncoated clearance) 0.018-0.044 mm (0.00071-0.00173 in)
Piston ring end gap - compression (top, in gauge) 0.17-0.33 mm (in)
Piston ring end gap - compression (bottom, in gauge) 0.3-0.55 mm (in)
Piston ring end gap - oil ring (steel rail, in gauge) 0.15-0.65 mm (0.006-0.026 in)
Piston ring groove width - compression (top) Piston ring groove width - compression (bottom) 1.535-1.52 mm (0.0603-0.0598 in)
Piston ring groove width - oil 3.05-3.03 mm (0.12001-0.11929 in)
Piston ring width - compression (top and bottom) 1.460-1.490 mm (0.05748-0.05866 in)
Piston ring width - oil ring Side seal, snug fit
Piston ring-to-groove clearance - 1st ring 0.030-0.065 mm (0.0012-0.00315 in)
Piston ring-to-groove clearance - 2nd ring 0.030-0.070 mm (0.0012-0.0028 in)
Piston pin bore diameter 23.014-23.018 mm (0.90606-0.90622 in)
Piston pin diameter 23.000-23.003 mm (0.90551-0.90563 in)
Piston pin length 63.55-63.05 mm (2.5096-2.4823 in)
Piston pin-to-piston fit 0.011-0.018 mm (0.00043-0.00071 in)
Connecting rod-to-pin clearance Press fit 8 kilonewtons (1,800 lb)
Connecting rod pin bore diameter 22.94-22.98 mm (0.90315-0.90472 in)
Connecting rod length (center-to-center) 154.66-154.74 mm (6.08896-6.09211 in)
Connecting rod maximum allowable bend 0.04 per 25 mm (0.0016 per in)
Connecting rod maximum allowable twist 0.059 per 25 mm (0.002 per in)
Connecting rod bearing bore diameter 61.635-61.655 mm (2.4266-2.4274 in)
Connecting rod bearing-to-crankshaft clearance - desired 0.025-0.035 mm (0.001-0.0014 in)
Connecting rod bearing-to-crankshaft clearance - allowable 0.022-0.069 mm (0.00086-0.0027 in)
Connecting rod side clearance (assembled to crank) - standard 0.11-0.49 mm (0.0047-0.01929 in)
Connecting rod side clearance (assembled to crank) - service limit 0.49 mm (0.0193 in) max.
Balance Shaft  
Journal diameter 52.108-52.082 mm (2.0515-2.0505 in)
Bore inside diameter 55.689-55.664 mm (2.192-2.191 in)
Maximum runout 0.025 mm (0.001 in)
End play 0.075-0.200 mm (0.003-0.008 in)