G643(E) Service Manual
Chapter 1. General Information
14
General Specification
G643E Engine
G643 Engine
GENERAL DESCRIPTION
ENGINE TYPE:
90°4-Cycle V6, Water Cooled
COMBUSTION SYSTEM:
Naturally Aspirated
INTAKE MANIFOLD
Cast Iron, Dry
EXHAUST MANIFOLD
Cast Iron, Dry
Pushrod Actuated Overhead Valves - 2 Per Cylinder
VALVE CONFIGURATION:
Auto Lash adjustment by hydraulic valve lifter
CAMSHAFT DRIVING:
Timing Chain System
BALANCE SHAFT:
One Balance Shaft System
DISPLACEMENT:
4294 cc (262 CID)
BORE:
101.60 mm (4.00 in.)
STROKE:
88.39 mm (3.48 in.)
COMPRESSION RATIO:
9.4:1
COMPRESSIONPRESSURE:
690 kPa (100 psi) Minimum
FIRING ORDER:
1-6-5-4-3-2
WEIGHT:
296 Kg (653 lbs.), Wet
ENGINE ROTATION:
Counter-Clockwise (CCW) when viewed from Flywheel End
FUEL TYPE:
LPG
CRANK VENTILATION
PCV System
IGNITION SYSTEM
IGNITION TYPE:
Distributor System
IGNITIOIN TIMING:
Electronic controlled by ECM
IGNITION COIL:
12 V operation volt
DISTRIBUTOR:
Delco EST Distributor with ignition module
SPARK PLUGS:
BOSCH 4205, 0.9mm (0.035in.) Air Gap
LUBRICATION SYSTEM
OIL PRESSURE (MIN. HOT):
28 kPa (4 psi) @ 700 RPM
124 kPa (18 psi) @ 2000 RPM
OIL TEMPERATURE:
Upper Limit: 130°C (266°F)
Recommended: 99 - 110°C (210 - 230°F)
Lower Limit: 80°C (176°F)
CRANKCASE CAPACITY:
4.3 L (4.5 qts.)
OIL FILTER:
0.47 L (0.5 qt.)
ENGINE OIL SPECIFICATION:
API - SJ, SAE 10W30
COOLING SYSTEM
WATER PUMP ROTATION:
Serpentine Belt Drive - Clockwise (CW) when viewed from engine front
THERMOSTAT:
Opening Temperature: 82°C (180°F)
Fully Open Temperature: 96°C (205°F)
COOLING WATER CAPACITY
7.6 L (block only)
