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)
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