The EGR system is controlled
by a PWM signal from the ECM. The system comprises an EGR valve and a gas
transfer pipe.
The EGR valve comprises a 4 pole stepper motor with an integral
cooler unit which is mounted on the side of the induction elbow. The EGR valve
is cooled by the return coolant flow from the electric throttle.
The EGR
valve is connected to the LH exhaust manifold via the gas transfer pipe.
CRANKCASE VENTILATION
The V8 engine is ventilated through a part load
and a full load breather.
The part load breather is a flexible composite
hose connected between the PCV valve mounted above the oil separator in the bank
A camshaft cover and the induction elbow. The Positive Crankcase Ventilation
(PCV) valve prevents reverse flow into the crankcase.
The full load breather is
a flexible hose connected between the oil separator in the bank B camshaft cover
and the air intake duct.
The ends of the breather hoses incorporate quick
release connectors.
The oil separators consist of wire gauze packed into an open
ended enclosure below the breather outlet.