Engine Specifications - Hummer H1 Service Manual

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2-96 Engine

ENGINE SPECIFICATIONS

General Data:
Displacement
Type
Bore
Stroke
Compression Ratio
Firing Order
Oil Pressure
Cylinder Bore
Diameter (Refer to Service Piston and Bore Specifications)
Out-of-Round (Maximum) . . . . . . . .0.0008 in. (0.02 mm)
Taper (Thrust Side) (Maximum) . . . .0.0008 in. (0.02 mm)
1
Piston to Bore Clearance :
Bores 1 through 6 . . 0.0037-0.0047 in. (0.094-0.120 mm)
Bores 7 and 8. . . . . . . . 0.004-0.005 in. (0.107-0.133 mm)
Piston Ring:
Groove Clearance:
Top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Keystone Ring
Second . . . . . . . . . . . . 0.0015-0.0031 in. (0.039-0.079mm)
Oil . . . . . . . . . . . . . . 0.0016-0.0035 in. (0.040-0.090 mm)
2
End Gap :
Top . . . . . . . . . . . . . . . . . 0.010-0.020 in. (0.26-0.51 mm)
Second . . . . . . . . . . . . . . . 0.029-0.039 in. (0.75-1.00 mm)
Oil . . . . . . . . . . . . . . . . . . 0.010-0.020 in. (0.25-0.51 mm)
Piston Pin:
Diameter 1.220-1.221 in. (30.9961-31.0039 mm)
Fit in Piston 0.00039-0.0006 in. (0.010-0.0153 mm)
Fit in Rod 0.0003-0.001 in. (0.0081-0.0309 mm)
Crankshaft:
Journal Diameter
(Refer to Main and Rod Journal Specification Charts)
Journal Taper (Maximum). . . . . . . .0.0002 in. (0.005 mm)
Journal Out-of-Round (Maximum) .0.0002 in. (0.005 mm)
Main Bearing Clearance
No. 1, 2, 3, 4 . . . . . . . 0.0018-0.003 in. (0.045-0.083 mm)
No. 5 . . . . . . . . . . . . . 0.002-0.0037 in. (0.055-0.093 mm)
Crankshaft End Play
Rod Bearing Clearance (Select Fit)
Rod Side Clearance
6.5L/395 c.i.d.
4 Cycle, Diesel, Liquid-Cooled
4.06 in. (103 mm)
3.82 in. (97 mm)
1-8-7-2-6-5-4-3
6 psi (69 kPa) at idle (hot);
30 psi (552 kPa) at 2000 RPM
0.0039-0.0098 in. (0.10-0.25 mm)
0.0017-0.0039 in.
(0.045-0.100 mm)
0.007-0.025 in. (0.17-0.63 mm)
Camshaft:
Lobe Lift ± 0.05
Intake. . . . . . . . . . . . . . . . . . . . . . . . .0.281 in. (7.133 mm)
Exhaust . . . . . . . . . . . . . . . . . . . . . . .0.281 in. (7.133 mm)
Camshaft End Play . . . 0.002-0.012 in. (0.051-0.305 mm)
Journal Diameter (Refer to Camshaft Specifications Chart)
20.2:1
1
NOTE: Add 0.0005 in. (0.013 mm) to cylinder bore diameters
to determine proper bore size for cylinders no. 7 and no. 8.
2
NOTE: Ring end gap specifications are for new bores; worn
bores will generate larger ring end gaps.
Valve Train:
Lifter Type . . . . . . . . . . . . . . . . . . . . . . . . . . . Hydraulic Roller
Rocker Arm Ratio. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.5:1
Valve Lash (Intake and Exhaust) . . . . . . . . . . . Not Adjustable
Valve Recess Depth:
Intake. . . . . . . . . . . . . . . . . . . . . . . .0.0013 in. (0.034 mm)
Exhaust . . . . . . . . . . . . . . . . . . . . . .0.0018 in. (0.048 mm)
Face Angle (Intake and Exhaust) . . . . . . . . . . . . . . . . . . . . . 45°
Seat Angle (Intake and Exhaust) . . . . . . . . . . . . . . . . . . . . . 46°
Seat Runout (Intake and Exhaust) . . . . . .0.0019 in. (0.05 mm)
Seat Width
Intake. . . . . . . . . . . . . . . . 0.035-0.060 in. (0.89-1.53 mm)
Exhaust . . . . . . . . . . . . . . 0.062-0.093 in. (1.57-2.36 mm)
Stem Clearance
Intake. . . . . . . . . . . . . 0.001-0.0027 in. (0.026-0.069 mm)
Exhaust . . . . . . . . . . . 0.001-0.0027 in. (0.026-0.069 mm)
Valve Spring Pressure
Closed . . . . . . . . . . . 80 lb at 1.81 in. (356 N @ 46.0 mm)
Open . . . . . . . . . . 230 lb at 1.39 in. (1025 N @ 35.3 mm)
Installed Height . . . . . . . . . . . . . . . . . . . . . . . . 1.8 in. (46 mm)
Timing Chain Free Play
New Chain. . . . . . . . . . . . . . . . . . . . . .0.500 in. (12.7 mm)
Used Chain . . . . . . . . . . . . . . . . . . . . .0.800 in. (20.3 mm)
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