Variable Valve Timing Actuator: Testing and Inspection

11 36 512 - Checking oil pressure of VANOS adjustment unit (S85)





Special tools required:
- 11 5 361 11 5 360 Adapter
- 11 5 362 11 5 360 Adapter
- 11 5 363 11 5 360 Adapter
- 11 5 364





Warning!
Tighten all screw connections to specified torque.

Oil pressure at VANOS adjustment unit is approx. 80 bar.





Necessary preliminary tasks:
- Run engine up to normal operating temperature.
- Connect diagnosis tester.
- Work through "VANOS control pressure banks 1 and 2" test module.
- All setpoint values are stored in the test module.





VANOS oil pressure measurement can be carried out exclusively with the Group Tester One (GT1) in conjunction with the Measurement Interface Box (MIB).





Note:
Measurement at central line (VANOS oil pressure).

Release banjo bolt (1).

Tightening torque: 11 36 2AZ. 11 36 Variable Camshaft Control VANOS

Installation Note:
Replace all sealing rings.





Screw in special tool 11 5 361 11 5 360 Adapter with ring connection.

Tightening torque: 11 36 2AZ. 11 36 Variable Camshaft Control VANOS

Secure special tool 11 5 364 at ring connection to 25 Nm.

Screw down (400 bar) pressure sensor (1) at special tool 11 5 364 to 25 Nm.

Order number 400 bar sensor: 81 31 0 417 530.

Installation Note:
New sealing rings must be used between the pressure lines and the ring connection.

Note:
Illustration shows intake air manifold removed.

Follow diagnosis instructions.





Note:
Selective bank (1 and 2) measurement:

Follow diagnosis instructions.

Disconnect VANOS high-pressure line from cylinder head.

Screw in special tool 11 5 362 11 5 360 Adapter with sealing ring on cylinder head.

Tighten special tool 11 5 362 11 5 360 Adapter to 25 Nm.

Bolt banjo bolt (1) with VANOS high-pressure line to special tool 11 5 363 11 5 360 Adapter.

Tightening torque: 11 36 2AZ. 11 36 Variable Camshaft Control VANOS





Assemble engine.

There is air in the VANOS system once it is opened.

In the first few seconds after startup this can result 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.