EGR Valve: Service and Repair

Exhaust Gas Recirculation Valve Mounting:

REMOVAL
1. Disconnect the Exhaust Gas Recirculation (EGR) valve vacuum hose.
2. Disconnect the electrical connector.
3. Remove the EGR tube from exhaust manifold.
4. Remove the EGR valve mounting nuts from plenum studs.
5. Disconnect the EGR tube from EGR valve.

NOTE: If EGR passages in the inlet manifold indicate excessive build-up of deposits, the passages should be cleaned. Care should be taken to ensure that all loose particles are completely removed to prevent them from clogging the EGR valve or from being ingested into the engine.


CAUTION:
^ Do Not wash any EGR valve in solvents or degreaser, as permanent damage may result. Also, sand blasting of the valve is not recommended since this can affect the operation of the valve.

^ Always wear approved eye protection for this cleaning procedure, to avoid possible injury to the eyes.

Inspection
Use the following cleaning instructions for all EGR valves except the digital EGR valve.
^ With a wire wheel, buff the exhaust deposits from the mounting surface and around the valve.
^ Inspect for exhaust deposits in the valve outlet. Remove deposit buildup with a screwdriver or other suitable tool.
^ Clean mounting surfaces of intake manifold and valve assembly.

INSTALLATION
1. Connect the EGR tube to EGR valve using a new gasket, tighten bolts to
25 Nm (19 lb ft).
2. Connect the EGR and tube assembly to the plenum using a new gasket and tighten the nuts to 25 Nm (19 lb ft).
3. Connect the EGR tube to exhaust manifold, tighten to 25 Nm (19 lb ft).
4. Connect the electrical connector.