Exhaust Gas Recirculation: Service and Repair

EGR System Assembly Overview

• The exhaust gas recirculation system is activated by the diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) (J248) to the electric EGR vacuum regulator solenoid valve (N18).

• Replace self-locking nuts.





1 Intake manifold

• With motor for intake flap (V157)

• With EGR potentiometer (G212) and electric EGR vacuum regulator solenoid valve (N18)

• The EGR potentiometer (G212), the electric EGR vacuum regulator solenoid valve (N18) and the mechanical exhaust gas recirculation valve are a single unit => [ (Item 8) Electrical with ] Intake Manifold Assembly Overview.

• Intake connection with EGR potentiometer (G212) with EGR vacuum regulator solenoid valve (N18), disassembling and assembling => [ Intake Connection with Electrical EGR Vacuum Regulator Solenoid Valve and Potentiometer ] Overhaul.

• Tighten mounting bolts to 22 Nm

• Removing and installing => [ Intake Manifold ] Intake Manifold.

2 Gasket

• Replace

3 Cooler for Exhaust Gas Recirculation (EGR)

• Removing and installing => [ EGR Cooler ] EGR Cooler.

4 22 Nm

5 Adjusting unit for the bypass flap

• Component of the exhaust gas recirculation cooler

6 Connecting pipe

7 22 Nm

• Replace

8 Exhaust manifold/turbocharger

• Removing and installing => [ Turbocharger ] Turbocharger.

9 10 Nm