Removing and Installing/Replacing Solenoid Valves on Left VANOS Adjustment Unit (S85)

11 36 715 - Removing and installing / replacing solenoid valves on left VANOS adjustment unit (S85)





Special tools required:
- 11 5 400 11 5 400 Torx Bit T20





Necessary preliminary tasks:
- Remove fan cowl with electronic fan.
- Remove coolant hose from radiator inlet.





Disconnect plug connection (3).
Plug connections (3) for inlet and exhaust solenoid valves are identified with flags on the wiring harness.

Important!
Risk of mixing up

Solenoid valve (1), inlet adjustment.

Solenoid valve (2), exhaust adjustment.





Release screw connection on solenoid valve with special tool 11 5 400 11 5 400 Torx Bit T20.





Installation:
Sealing rings (1) cannot be replaced.
If one of the sealing rings (1) is damaged, the solenoid valve must be replaced.
Lightly lubricate sealing rings (1) with engine oil.





Installation:
Replace sealing ring (1).

Secure sealing ring (1) in groove; if necessary, secure against falling out with grease.





Assemble engine.
There is air in the VANOS system once it is opened.
In the first few seconds after startup this results in a clearly discernible "rattling noise".
This rattling noise does "not" indicate incorrect assembly.
The rattling noise will disappear as soon as the oil pressure has built up and the system has vented.
Carry out venting procedure with diagnosis tester.
Perform VANOS test.