Glow Plug: Removing: Procedure
When removing the glow plugs, make sure no contaminants enter the fuel system and the glow plug duct.
Seal off the connections in the fuel system using the plugs from the Engine Bung Set VAS 6122.
-- Remove the engine cover. Refer to ENGINE COVER .
-- Remove the protective strip, if equipped Protective Strip .
-- Disconnect the connectors from the fuel injectors -A-, Exhaust Pressure Sensor 1 -G450- -B- and the Fuel Pressure Sensor -G247- -C-.
-- Remove the coolant line bolts -arrows- from the intake manifold and move the line in front of the intake manifold.
-- Remove the fuel return line bolt from the intake manifold Bolt .
-- Remove the connectors from the glow plug. Refer to GLOW PLUG CONNECTORS, REMOVING AND INSTALLING .
-- Loosen the spring clamp -arrow- with hose clip pliers and remove the line on the high pressure reservoir.
-- Before removing, clean the return line connection on the fuel injectors (for example using a commercially available detergent).
-- Dry the return line connections.
-- Cover the return line connections with a cloth.
-- Remove the fuel return line connections on the fuel injectors. Pull them upward to release them -arrow-.
-- Loosen the spring clamp -4- using Spring Type Clip Pliers VAS 6362 and remove the fuel return line from the high pressure fuel pump.
-- Seal the lines so that the fuel system is not contaminated by dirt etc.
-- Remove the fuel return lines Fuel Return Lines and lay them in front of the intake manifold.
-- Remove the glow plug wiring guide and lay it aside.
- When cleaning the glow plug duct, make sure no contaminants or cleaning solutions enter the connector contacts on the glow plugs.
- Do not clean the connectors with cleaning solutions or compressed air.
-- Clean the glow plug duct in the cylinder head. Dirt must not fall into the cylinder.
Extract large contaminants with a vacuum cleaner.
Clean glow plugs with a commercially available detergent.
Dry the glow plugs with compressed air.
Then clean the glow plug duct with a cloth dampened with oil.
-- Remove the glow plugs with 14 mm Socket VAS 6454.