seat Workshop Repair Guides

SEAT Workshop Service and Repair Manuals

ABOUT US
Removing and installing drive shaft with constant velocity joint > < Loosening and tightening twelve-point head bolt, with ribbing, securing drive shaft

Leon Mk1

Loosening and tightening twelve-point head bolt, without ribbing, securing drive shaft
Loosening and tightening twelve-point head bolt, without ribbing, securing drive shaft
Special tools and workshop equipment required
   
t  Socket, 24 mm -T10361-
  W00-10516
t  Angle wrench -V.A.G 1756-
  W00-0449
Distinguishing features between twelve-point head bolt with ribbing and twelve-point head bolt without ribbing.
The twelve-point head bolts can be distinguished by the contact surfaces -arrow A- and -arrow B-.
I - Twelve-point head bolt with ribbing -arrow A-
II - Twelve-point head bolt without ribbing -arrow B-
  Caution
Wheel bearings must not be subjected to load after loosening bolt securing drive shaft at wheel hub.
If they have to support the weight of the vehicle they will be damages and their service life will be reduced.
It is not permissible to turn drive shaft bolt more than 90° anti-clockwise if vehicle is standing on its wheels.
Do not attempt to move the vehicle without the drive shafts fitted; this would result in wheel bearing damage. If a vehicle nevertheless has to be moved, comply with the following:
t  Install an outer joint instead of the drive shaft.
t  Tighten outer joint to 120 Nm.
Loosening twelve-point bolt
–  With the vehicle still standing on its wheels, loosen the dodecagonal bolts by maximum 90° in order not to damage the wheel bearing. Use the 24 mm socket insert -T10361- to do this.
–  Raise vehicle so that wheels are off the ground.
–  Have second mechanic apply brakes.
  N40-10569
–  Remove twelve-point bolt -arrow-.
Installing twelve-point bolt
–  Renew twelve-point bolt.
  Note
The wheels must not be in contact with the ground when initially tightening the drive shaft bolt; otherwise the wheel bearing will be damaged.
–  Have second mechanic apply brakes.
–  Tighten twelve-point bolt to 200 Nm.
–  Lower vehicle onto its wheels.
–  Turn twelve-point bolt 180° further.
  A42-0248

Removing and installing drive shaft with constant velocity joint > < Loosening and tightening twelve-point head bolt, with ribbing, securing drive shaft