EXHAUST GAS RECIRCULATION
TABLE OF CONTENTS
page page
EXHAUST GAS RECIRCULATION
SPECIFICATIONS
TORQUE ............................20
EGR VALVE
DESCRIPTION .........................20
OPERATION ...........................20
REMOVAL - 3.5L ........................20
INSTALLATION - 3.5L ....................21
EGR TUBE - 3.5L
REMOVAL - 3.5L ........................21
INSTALLATION - 3.5L ....................22
EXHAUST GAS
RECIRCULATION
SPECIFICATIONS
TORQUE
DESCRIPTION N·m Ft. Lbs. In. Lbs.
EGR valve to cyl. head 31 22.8 275
EGR tube to EGR valve 11 95
EGR tube to intake manifold 11 95
EGR tube to exhaust manifold 31 22.8 275
EGR VALVE
DESCRIPTION
The EGR valve consists of three major components.
First there is the pintle, valve seat, and housing
which contains and regulates the gas flow. Second
there is the armature, return spring, and solenoid
coil to provide the operating force to regulate the
flow by changing the pintle position. The solenoid coil
assembly is in parallel with a diode and connects to
the two connectors in the connector assembly. The
third major component which senses pintle position
and is connected to the three connectors in the elec-
trical connector.
OPERATION
The exhaust gas recirculation flow is determined
by the engine controller. For a given set of conditions,
the engine controller knows the ideal exhaust gas
recirculation flow to optimize NOx and fuel economy
as a function of the pintle position. Pintle position is
obtained from the position sensor. The engine con-
troller adjusts the duty cycle of 128 Hz power sup-
plied to the solenoid coil to obtain the correct
position.
REMOVAL - 3.5L
(1) Disconnect negative battery cable.
(2) Remove air inlet tube and resonator.
Fig. 1 EGR tube and Valve - 3.2/3.5L
1-EGR TUBE
2-EGR VALVE
25 - 20 EXHAUST GAS RECIRCULATION LH
To Next Page
Loading...
