1.2 TDI CR engine (EA189) · Crankshaft group · Cylinder block (pulley end)
Removing and installing poly V-belt (vehicles with idler roller)
Special tools and workshop equipment required
- Torque wrench - V.A.G 1331-.
»Carry out the following work sequence«
Removing
- Noise insulation ⇒ General body repairs, exterior; Rep. gr. 50; Body - front; Assembly overview - noise insulation.
- Unscrew bolt for poly V-belt idler roller -arrow- until poly V-belt can be removed easily.
- Remove poly V-belt.
Installing
- Using a brush, coat guide surfaces of idler roller with lubricating paste. ⇒ ETKA (Electronic Parts Catalogue) G 052 751 A1.
- Fit poly V-belt on poly V-belt pulley:
- 1 Vibration damper
- 2 Idler roller
- 3 Alternator
- 4 Air conditioner compressor
- Now insert idler roller, with its bolt, into guide of ancillary bracket.
Tightening sequence for poly V-belt idler roller.
- Tighten bolt in 5 stages.
| Stage | Bolt | Specified torque/turning further angle |
|---|---|---|
| 1) | -2- | Screw in by hand as far as stop • the poly V-belt is tensioned |
| 2) | -2- | turn until tensioning roller bolt reaches stop • the poly V-belt is tensioned further |
| 3) | -2- | Turn back 90° |
| 4) | -2- | 30 Nm |
| 5) | -2- | Turn 90° further |
- As shown in illustration, check whether the end of the bolt for idler roller/poly V-belt protrudes over the running surface of the idler roller. Dimension -a- = approx. 2.5 mm.
This ensures that the idler roller bolt was tightened up to its end position.
Continued for all vehicles:
- Turn engine at least one turn in direction of rotation at the belt pulley/vibration damper central bolt.
On completing work:
- Start engine, and check belt running.
- Install noise insulation ⇒ General body repairs, exterior; Rep. gr. 50; Body - front; Assembly overview - noise insulation.