Exhaust Gas Recirculation: Service and Repair

EXHAUST GAS RECIRCULATION (EGR) SYSTEM, OVERVIEW:

NOTES:

^ Activation of the EGR system is under the control of the Engine Control Module (ECM) via EGR valve N18.

^ The function/control of the EGR system is checked by the ECM On Board Diagnostic II system.

^ When working on the system always replace seals and gaskets.

^ Vacuum hoses and hose connections must be free of leaks.

^ Vacuum hoses must not be blocked or kinked.

EGR SYSTEM COMPONENTS, REMOVING AND INSTALLING:

Vehicles Produced up to 07.96 (only for US vehicles):

^ up to 07.96 only for US vehicles
1 - Exhaust manifold
^ AAF engine:
2-piece with intermediate and corrugated pipes
2 - 35 Nm (26 ft lb)
3 - CO sampling pipe
^ up to 07.94
4 - Plug
5 - EGR temperature sensor G98
^ 2O Nm (15 ft lb)
^ With 2-pin connector
6 - EGR valve
^ Checking Testing and Inspection
7 - 9 Nm (7 ft lb)
8 - 10 Nm (7 ft lb)
9 - EGR Vacuum Regulator solenoid valve N18
^ Two-way valve
10 - Collective connection
^ for intake manifold vacuum
11 - Filter
12 - 2-pin harness connector
^ for EGR Vacuum Regulator solenoid valve N18
13 - Pipe
14 - Pipe union
^ 34 Nm (25 ft lb)
^ In intake manifold
15 - Gasket
^ Replace

Vehicles from 08.96:

^ Vehicles from 08.96
1 - Exhaust manifold
2 - Pipe
3 - Pipe union
^ 30 Nm (22 ft lb)
4 - 10 Nm (7 ft lb)
5 - EGR valve
^ Checking Testing and Inspection
^ In intake manifold
6 - Gasket
^ Replace
7 - Intake manifold
8 - EGR Vacuum Regulator solenoid valve N18
^ Two-way valve
9 - 10 Nm (7 ft lb)
10 - Filter
11 - 30 Nm (22 ft lb)