Drive Belt Tensioner: Service and Repair

Remove/Install Poly V-belt Tensioning Device

Shown On Engine 112:

DANGER:
- Lethal injuries are possible if vehicle slips off of lifting platform
- Align vehicle between the columns of the hydraulic hoist and position the four support plates below the hoist support points specified by the vehicle manufacturer.

1.1 Remove the fan shroud (3).
1.2 Remove electric fan (1)
2 Remove poly-V-belt (2)
3 Rotate tensioning pulley in anti-clockwise direction and lock

NOTE: Lock tensioning pulley with drift or pin (6, diameter 5 mm).

4 Unbolt shock absorber (7) at coolant pump

Shock Absorber Of Belt Tensioning Device To Coolant Pump Housing - 35 N.m

See "Special Tool" given below.

5 Unscrew bolts of tensioning device (5)

Self-tapping Bolt Of Belt Tensioner To Timing Case Cover
- Thread Not Pretapped - 35 N.m
- Thread Pretapped - 25 N.m

See "Special Tool" given below.

6 Remove tensioning device (4)
7 Unscrew shock absorber (7) at tensioning device (4)

Bolt Of Belt Tensioner To Timing Case Cover - 25 N.m

See "Special Tool" given below.

8 Install in the reverse order

Special Tool

External Torx Set, P/N # 001 589 76 09 00: