11 36 720 Removing And Installing / Replacing Solenoid Valves On Right VANOS Adjustment Unit (S85)

Special tools required: 

• 11 5 400

Necessary preliminary tasks: 

• Remove fan cowl with electronic fan. See 17 11 035 REMOVING AND INSTALLING/REPLACING FAN COWL WITH ELECTRIC FAN (M5) or 17 11 035 REMOVING AND INSTALLING/REPLACING FAN COWL WITH ELECTRIC FAN (M6) .
• Remove coolant hose from radiator inlet.

Disconnect plug connection (1) on solenoid valve for exhaust adjustment.

Disconnect plug connection (2) on solenoid valve for inlet adjustment.

Plug connections (1 and 2) for inlet and exhaust solenoid valves are identified with flags on the wiring harness.

Fig 1: Identifying Plug Connections

Courtesy of BMW OF NORTH AMERICA, INC.

Release screw connection (1) on solenoid valve with special tool 11 5 400.

Fig 2: Identifying Special Tool 11 5 400

Courtesy of BMW OF NORTH AMERICA, INC.

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.

Fig 3: Identifying Sealing Rings

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Replace sealing ring (1).

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

Fig 4: Identifying Sealing Ring

Courtesy of BMW OF NORTH AMERICA, INC.

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.