11 27 110 Removing and refitting/replacing balancer shafts (N20)

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Special tools required:

IMPORTANT: The counterbalance shaft must be adjusted to the motor.

Necessary preliminary tasks:

Removing oil sump . See 11 13 000 REMOVING AND INSTALLING, SEALING OR REPLACING OIL SUMP (N20) .

Installation note:

Wet special tool 2 219 548 with oil to simplify dismantling and installation.

Secure crankshaft with special tool 2 219 548 via the dowel hole.

Fig 1: Identifying Special Tool (2 219 548)

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Loosen sealing cap using a screwdriver.

Fig 2: Loosening Sealing Cap Using Screwdriver

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Installation note:

Position counterbalance shaft with special tool 2 212 825 .

Secure special tool 2 212 825 on oil pump housing with screw (1).

If special tool 2 212 825 cannot be positioned, the TIMING must be readjusted.

Fig 3: Locating Special Tool (2 212 825), Oil Pump Housing And Screw

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IMPORTANT: Sprocket must be blocked with special tool 2 318 117 in order to release central bolt (2).
Attach special tool 2 318 117 to crankcase with screws (3).

Press back chain tensioner and fix with special tool 11 4 420 .

Installation note:

There are various central bolts of the oil pump/camshaft sprocket.

Loosen torx socket with T50 using special tool 11 4 420 .
Torx socket with T60 can be released using special tool 11 8 580 .

Fig 4: Attaching Special Tool (2 318 117) To Crankcase
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Release oil pump central bolt (2).

Tightening torque: 11 41 5AZ .

Unfasten screws (2).

Release screws (1).

Tightening torque: 11 41 3AZ .

Remove gear and chain module (2).

Fig 5: Identifying Screws, Gear And Chain Module

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IMPORTANT: Observe different screw lengths.

Release screws (1).

Tightening torque: 11 41 6AZ/2AZ .

Release screws, remove oil pump with counterbalance shaft.

Tightening torque: 11 41 2AZ .

Installation note:

Check spacer bushes for secure seating and damage; replace if necessary.

Fig 6: Identifying Oil Pump, Counterbalance Shaft And Screws

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Assemble engine.