DSG-423 ENGINE
02-3
GENERAL INFORMATION
Engine
The DSG 423 is a 4 valve per cylinder, dual overhead
cam engine. The engine block is cast aluminum with
iron cylinder liners. Connecting rods are made of
sintered metal, the crankshaft is nodular iron with five
main bearings. The cam cover, oil pan and front cover
are also made of aluminum.
The dual camshafts are chain driven with an automatic
tensioning system. The valve train components are
alternate fuel ready. Spark is delivered by an individual
coil on plug ignition system. A broadband knock sensor
is calibrated for individual cylinder use.
All fuels are controlled in closed loop. Gasoline is
delivered by sequential port fuel injection. The
electronic engine management system has built in
engine protection against:
• detonation
• high coolant temperature
• low oil pressure
• engine overspeed
• starter engagement while engine is running.
NOTE: A set of metric wrenches are required to service
the DSG 423 engine.
WARNING: TO AVOID THE POSSIBILITY OF
PERSONAL INJURY OR DAMAGE, DO NOT
OPERATE THE ENGINE UNTIL THE FAN BLADE
HAS BEEN FIRST EXAMINED FOR POSSIBLE
CRACKS OR SEPARATION.
Positive Crankcase Ventilation System
This engine is equipped with a positive, closed-type
crankcase ventilation system, which recycles
crankcase vapors to the intake manifold.
Engine Cooling System
The 2.3L engine is liquid cooled, using an engine
mounted coolant pump and external radiator. This is a
full flow system regulated by a thermostat, located
behind the water outlet connection. The thermostat
controls and maintains engine temperature.
Refer to Section 05 of this manual for more information
on the cooling system.
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