EGR Manifold Passage Inspection

DESCRIPTION
If Exhaust Gas Recirculation (EGR) passages in the intake manifold indicate excessive buildup 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.

PROCEDURE

Clean
^ With a wire wheel, buff the exhaust deposits from the mounting surface and around the valve.
^ Look for exhaust deposits in the valve outlet. Remove deposit buildup with a screwdriver.
^ Clean mounting surfaces of the intake manifold and EGR valve assembly.