IMPORTANT: Always check that the solenoid valves are clean during removal and installation.
Possible malfunctions if valves are contaminated:
IMPORTANT: Risk of damage! Do not clean solenoid valves with compressed air.
Solenoid valves, cylinders 5-8:
Necessary preliminary work
NOTE: Solenoid valve (2) controls the intake adjuster.
Solenoid valve (4) controls the exhaust adjustment unit.
Unlock plug connections of solenoid valves (2 and 4) and disconnect.
Installation note: Plug connections must snap audibly into place!
Fig. 367: Identifying Solenoid Valves
Unfasten screws (1 and 3).
Tightening torque 11 36 3AZ.
Pull out solenoid valves (2 and 4).
Installation note:
Replace O-rings (1 and 2) on solenoid valve
Installation note:
To install solenoid valves, coat both O - rings with engine oil.
If the solenoid valve is to be reused, the filter strainer (see arrow) must be cleaned.
Fig. 368: Identifying O-Rings On Solenoid Valve
NOTE: If a filter element is clogged with dirt, the filter element (filter strainer) may be removed.
Release filter elements (1) at contact edges.
Fig. 369: Identifying Filter Elements At Contact Edges
Bend open welding spots on filter element (1) with a screwdriver (2) in direction of arrow until welding spots are opened.
Fig. 370: Bending Open Welding Spots On Filter Element With Screwdriver
Avoid damaging, e.g. notches or scratches, the solenoid valve housing (see arrows).
Fig. 371: Inspecting Notches Or Scratches For Solenoid Valve Housing
Carefully insert solenoid valves (2 and 4) up to stop.
Ensure correct installation position.
Insert screws (1 and 3) and tighten down.
Tightening torque 11 36 3AZ.
Fig. 372: Identifying Solenoid Valves
Assemble engine.
Delete fault memory.
Check function of DME control unit.