Matching - Volkswagen 2004 Golf Workshop Manual

Golf 2004 ➤ , Golf Plus 2005 ➤
Running gear, axles, steering - Edition 08.2009
Wheel
Alloy wheel
Note
If the measured value exceeds the specification, acceptably
smooth running cannot be attained.
12.10

Matching

General
When radial or lateral runout of the wheel and tyre coincide, the
imbalance of the wheel is amplified by the tyre.
For technical reasons, 100% true running is not possible
⇒ page 328 .
Before match mounting the used wheels which are fitted on the
vehicle, run the tyres warm. This will eliminate any flat spots
caused by storage or handling,
Procedure for match mounting
– Deflate the tyre.
– Press the tyre beads off the rim flanges.
– Coat the tyre bead all round with tyre fitting paste .
– Rotate the tyre 180° relative to the wheel.
– Inflate the tyre to approx. 4 bar.
– Mount the wheel with tyre on the wheel balancer.
– Check true running, that is, radial and lateral runout.
Note
If the specified values for radial and lateral runout are not ex‐
♦
ceeded, the wheel can be balanced to 0 gram. Specified
values appear on ⇒ page 328
If the radial and lateral runout is not within the specifications,
♦
the tyre must be rotated again.
– Deflate the tyre and press off the tyre beads from the rim
flanges.
– Rotate the tyre 90° with respect to the wheel (1/4 of a turn).
– Inflate the tyre to 4 bar again and check true running.
Note
If the specified values for radial and lateral runout are not ex‐
♦
ceeded, the wheel can be balanced to 0 gram.
If the radial and lateral runout are not within the specified val‐
♦
ues, the tyre must be rotated again.
– Press the tyre off the rim flanges again as described above.
– Rotate the tyre 180° with respect to the wheel (1/2 a turn).
330
Rep. Gr.44 - Wheels, tyres, vehicle geometry
Radial runout (mm)
0.5
⇒ page 331 .
.
Lateral runout (mm)
0.8