General characteristics
RPO Code - LG6
VIN code - D
The working volume of the cylinders is 189 cubic meters. inches
Cylinder Compression Pressure - Minimum 100 psi
The maximum pressure difference in different cylinders is 30%
Ignition order - 1-2-3-4-5-6
Oil pressure - 15 psi at 1100 rpm
Cylinder head
Ultimate Deformation - 0.005"
The maximum allowable depth of the mark is 0.010 inches
Valves and related items
Valve Chamfer Width - 1/32" minimum
Valve seat angle - 46°
Clearance between valve stem and guide sleeve - 0.0010-0.0027 in
Valve spring free length (inlet and outlet) - 1.91 inches
Valve spring pressure:
- Closed - 82 lbs @ 1.58" length
- Opened - 191 lbs at 1.291" length
Mounting Height - 1.5748"
Crankshaft and connecting rods
Connecting rod neck:
- Diameter - 1.9994-1.9983 inches
- Bearing clearance - 0.0011-0.0034 in
End play of the connecting rod - 0.014-0.0267 inches
Main bearing journal:
- Diameter - 2.6473-2.6483 inches
- Bearing clearance - 0.0012-0.0027 in
- Maximum allowable taper/out-of-roundness - 0.0002 in
Axial play of the crankshaft (at thrust bearing) - 0.0024-0.0083 inches
Cylinder block
Cylinder liners:
- Diameter - 3.503-3.506 inches
- Maximum cylinder out-of-roundness - 0.0005 in
- Maximum taper of the cylinder (at the stubborn side) - 0.0005 inch
Maximum deformation of block-to-cylinder head contact surface - If more than 0.010" must be removed, replace block
Pistons and piston rings
The clearance between the piston and the walls of the cylinder - 0.0009-0.0022 inches
Piston ring gaps:
- Top compression ring - 0.010-0.020 in
- Lower Compression Ring - 0.020-0.028"
- Oil scraper ring - 0.010-0.030 in
Piston ring groove clearance:
- Compression rings - 0.0020-0.0035 in
- Oil scraper ring - 0.008 in
Camshaft
Bearing journal diameter - 1.8678-1.8815 inches
Bearing clearance - 0.001-0.004 inches
Cam lift:
- Inlet Valve - 0.2306"
- Exhaust Valve - 0.2619"
Torques, Foot-lbs
Main bearing cap bolts - 72
Connecting rod nuts - 39
Camshaft sprocket bolts - 18
Flywheel to crankshaft bolts - 50
Note. For more details on tightening torques, see parts 2.1.