Removing and Installing / Replacing VANOS High-Pressure Pump (S85)

11 36 140 - Removing and installing / replacing VANOS high-pressure pump (S85)





Special tools required:
- 11 4 350 11 4 350 Torque Wrench
- 11 6 251 11 6 250 Lever Gauge (Puppitast)
- 11 6 252 11 6 250 Lever Gauge (Puppitast)
- 11 6 254 11 6 250 Lever Gauge (Puppitast)





Important!
Risk of damage to the VANOS high-pressure line.

Do not crank engine while banjo bolt is released.





Necessary preliminary tasks:
- Remove engine oil sump Service and Repair.
- Remove oil pump Service and Repair.





Release banjo bolt (1).

Tightening torque. 11 36 4AZ.

Release screws (2).

Remove VANOS high-pressure pump (3).





Note:
Engine installed.

Secure piston (1) against falling out; remove if necessary.

Check adapter sleeve (2) for damage and secure seating; replace if necessary.





Installation Note:
Arrangement, chain tensioner, oil pump.

1. - Base valve
2. - Spring
3. - Piston





Installation Note:
Replace fine-mesh strainer.

Remove fine-mesh strainer (1) with screwdriver in direction of arrow.

Check adapter sleeve (2) for damage and secure seating; replace if necessary.





Remove and fine-mesh strainer (1) in direction of arrow.

Clean sealing surface (2).

Installation Note:
Replace fine-mesh strainer.





Check gear wheel (1) and sprocket wheel for damage, replace if necessary.

Release bolts (7).

Tightening torque. 11 36 7AZ 11 36 Variable Camshaft Control VANOS.

Release screw (2).

Check sliding rail (3) for damage; replace if necessary.

Check timing chain (4) for damage; replace if necessary.

Release bolt (6).

Check tensioning rail (5) for damage; replace if necessary.





Important!
Low and high teeth of gear wheels.

Replace gear wheel in pairs only.

Old build date up to 12/05: low teeth.

New build date from 12/05: high teeth.





Replacing gear wheels

Necessary preliminary tasks:
- Remove vibration damper Service and Repair.
- Remove radial shaft seal Service and Repair at front.





Important!
VANOS high-pressure pump from 12/05

Spacer plates must not be fitted.

Clamping rail (1) of oil pump with visible sleeve (see arrow).

It is not necessary to measure the oil pump chain.





Important!
VANOS high-pressure pump up to 12/05

Clamping rail (1) of oil pump without visible sleeve (see arrow).

On the VANOS high-pressure pump up to 12/05, it is necessary to check the pretension Service and Repair on the oil pump chain.





Important!
Spacer plates are only required if the oil pump Service and Repair chain demonstrates excessive tension.

Low teeth of VANOS high-pressure pump before 12/05.

Tie back VANOS high-pressure line (2) with cable tie (1).

Install spacer plate (3).

Install spacer (4).





Position VANOS high-pressure pump (3) on crankcase.

Insert screws (2).

Slide VANOS high-pressure pump in direction of crankshaft until gearwheel (3) has slight play.

Initially tighten VANOS high-pressure pump with special tool 11 4 350 11 4 350 Torque Wrench to 2 Nm.





Mount special tool 11 6 254 11 6 250 Lever Gauge (Puppitast) on crankcase.

Secure special tool 11 6 252 11 6 250 Lever Gauge (Puppitast) with magnetic base to special tool 11 6 254 11 6 250 Lever Gauge (Puppitast).





Align special tool 11 6 251 11 6 250 Lever Gauge (Puppitast) with its measuring shaft (2) vertically to gearwheel (1).

Rotate high-pressure pump gearwheel (1) up to stop.

Set special tool 11 6 251 11 6 250 Lever Gauge (Puppitast) to zero.





Rotate high-pressure pump gearwheel in direction of arrow up to stop.





Backlash at high-pressure pump min. 0.06 to max. 0.08 mm.

If necessary, correct VANOS high-pressure pump adjustment.





Adjustment of VANOS high-pressure pump (2) with a rubber mallet on pump housing.

Tightening torque 11 36 8AZ 11 36 Variable Camshaft Control VANOS.





Installation Note:
Replace all sealing rings.

Install banjo bolt (1).

Tightening torque.11 36 4AZ 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 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.