Exhaust Gas Recirculation: Service and Repair

Exhaust Gas Recirculation (EGR) system, overview

Note:
^ The function/control of file Exhaust Gas Recirculation (EGR) system is managed by the Diesel direct injection system ECM -J248 via the EGR Vacuum Regulator solenoid valve -N18-.
^ The cone-shaped plunger in the mechanical EGR valve ensures that various cross sectional openings are possible at different plunger heights.
^ Every possible valve position is provided via pulsed control.
^ Always replace self-locking nuts.

Exhaust gas recirculation system components, removing and installing





1. Intake manifold
2. O-ring
^ Always replace
3. Intake air connector
^ With EGR valve and control flap
4. Exhaust Gas Recirculation valve
^ Component of intake air connector
^ Can only be replaced with intake air connector
^ Checking Testing and Inspection
^ Control, checking:
5. 10 Nm (7 ft. lbs.)
6. From charge air cooler
7. Gasket
^ Always replace
8. 25 Nm (18 ft. lbs.)
9. Connecting pipe
10. To heater core
^ Coolant hose connections diagram
11. Connecting - pipe
12. Exhaust manifold
^ Part of turbocharger
^ Can only be replaced with turbocharger
13. 25 Nm (18 ft. lbs.)
14. From connector
^ Coolant hose connections diagram
15. EGR cooler
16. To coolant expansion tank and coolant center line
^ Coolant hose connections diagram