Adjustment shim thickness, determining
WARNING: This page is about a different car, the 1999 Volkswagen GTI, 1998 Volkswagen GTI, 1997 Volkswagen GTI, 1996 Volkswagen GTI, and 1995 Volkswagen GTI. However, it is still accessible from the selected car via links, so may be relevant.
The correct shim thickness is selected by adding:
- specified bearing preload (a constant, 0.20 mm)
- the measured play (example: 0.30 mm)
- test shim thickness (0.65 mm)
Example:
Inserted test shim 0.65 mm
+ Reading from dial indicator 0.30 mm
+ Preload (constant) 0.20 mm
Shim thickness required = 1.15 mm
- Remove output shaft and pull out small tapered roller bearing outer race: Se OUTPUT SHAFT, ADJUSTING .
The following adjustment shims are available:
OUTPUT SHAFT SHIM THICKNESS SPECIFICATIONS
| Thickness mm | Replacement part number |
|---|---|
| 0.65 | 020 311 391 P |
| 0.70 | 020 311 391 Q |
| 0.75 0.80 0.85 |
020 311 391 020 311 391 A 020 311 391 B |
| 0.90 0.95 1.00 |
020 311 391 C 020 311 391 D 020 311 391 E |
| 1.05 1.10 1.15 |
020 311 391 F 020 311 391 G 020 311 391 H |
| 1.20 1.25 1.30 |
020 311 391 J 020 311 391 K 020 311 391 L |
| 1.35 1.40 |
020 311 391 M 020 311 391 N |
NOTE:
Different tolerances make it possible to select the exact shim size required.
- Press in outer race for small input shaft tapered roller bearing along with correct adjustment shim, see OUTPUT SHAFT, ADJUSTING
.
- Example (calculated above): 1.15 mm
- Install output shaft.
- Tighten bearing support mounting nuts in clutch housing.
- Tightening torque: 25 N.m (18 ft lb) plus additional 90° (1/4-turn)