Drive Belt Tensioner: Service and Repair
Removing and installing tensioning devicePreceding work:
- Fan shroud removed.
- Viscous fan clutch removed.
- Intake air guide removed.
- Slacken bolts (20), (23) and (25) of belt pulleys viscous fan clutch (22), coolant pump (24) power steering pump (26) before removing poly-V-belt.
- Remove poly-V-belt (27). Service and Repair
- Remove belt pulleys of viscous fan clutch (22), coolant pump (24) power steering pump (26).
- Unscrew damper (10) of tensioning device at bracket (7) (21 Nm).
- Unscrew bolt (16) (75 Nm).
- Unscrew bolts (1), (3) and (4) (21 Nm).
Note: Counter-hold at nut (2) with wrench.
- Remove strut (12).
Installation note: Apply sealant 001 989 29 20 at hole (arrow) of strut (12) at front and rear.
- Remove bolt (16), washer (15), setting pointer (13), tensioning device (14) and sleeve (17).
- Unscrew bolts (11) (21 Nm).
- Swivel power steering pump (28) outward.
- Remove bracket (19) with tensioning nut (5) and tensioning bolt (18).
- Check tensioning device (14).
Tightening torques in Nm
Bolts of belt pulleys of fan clutch in coolant pump 10
Bolt of tensioning device 75
Bolts of strut and bracket 25
Special Tools:
Note:
Modification to bracket of poly-V-belt tensioner
The supporting tube (a), previously welded to the bracket, is now fitted loose.
Indefinite production breakpoint as of February 1990.