General characteristics
RPO code - L27
VIN code - L
The working volume of the cylinders is 231 cubic meters. inch
Cylinder Compression Pressure - Minimum 100 psi
The maximum pressure difference in different cylinders is 30%
Ignition order - 1-6-5-4-3-2
Oil pressure - 15 psi at 1100 rpm
Cylinder head
Ultimate Deformation - 0.003" 6" / 0.006 Full
The maximum allowable depth of marks is 0.010 inches
Valves and related items
Valve Face Width - 1/32"
Valve seat angle - 45°
Clearance between valve stem and guide sleeve
- Inlet - 0.0015-0.0035 inches
- Exhaust - 0.0015-0.0035 inches
Spring free length - 1.981 inches
Valve spring pressure:
- Closed - 80 lbs @ 1.75" length
- Opened - 210 lbs @ 1.315" length
Spring Mounting Height - 1.690-1.720 inches
Crankshaft and connecting rods
Connecting rod neck:
- Diameter - 2.2487-2.2499 inches
- Bearing clearance - 0.0008-0.0022 inches
Maximum Taper - 0.0003"
Connecting rod end play - 0.003-0.015 inches
Main bearing journal:
- Diameter - 2.4988-2.4998 inches
- Bearing clearance - 0.0008-0.0022 inches
Maximum allowable taper/out-of-roundness - 0.003 in
Axial play of the crankshaft (at thrust bearing) - 0.003-0.011 inches
Cylinder block
Cylinder liners:
- Diameter - 3.800 inches
- Maximum cylinder out-of-roundness - 0.0004 in
- Maximum cylinder taper - 0.0005 in
Pistons and piston rings
Gap between piston and cylinder wall (44 mm from the top edge of the piston) - 0.0004-0.0022 inches
Piston ring clearance:
- Compression rings - 0.010-0.025 inches
- Oil scraper ring - 0.015-0.055 in
Piston ring groove clearance:
- Compression rings - 0.0013-0.0031 in
- Oil scraper ring - 0.011-0.0081 in
Camshaft
Bearing journal diameter - 1.785-1.786 inches
Bearing clearance - 0.0005-0.0035 inches
Cam lift:
- Inlet valve - 0.250 in
- Exhaust valve - 0.255 in
Torques, lb-ft
(if no other unit of measure is specified)
Main bearing cap bolts:
- 1st stage - 26
- 2nd stage - Tighten 50°
Connecting rod bolts:
- 1st stage - 20
- 2nd stage - Tighten 50°
Balance shaft gear bolt:
- 1st stage - 14
- Stage 2 - Tighten 35°
Balance Shaft Holder Bolts - 22
Camshaft sprocket bolt:
- 1st stage - 74
- 2nd stage - Tighten 105°
Flywheel to crankshaft bolts:
- 1st stage - 11
- 2nd stage - Tighten 50°
Note. For additional tightening torques, see parts 2.2.