Wheel Bearing Housing
Special tools and workshop equipment required
- Torque Wrench V.A.G 1332
Removing
-- Measure dimension from center of wheel to lower edge of wheel housing. Refer to WHEEL BEARING, LIFTING TO CURB WEIGHT POSITION .
-- Loosen the outer drive axle threaded connection.
Loosening the connection between the drive axle and wheel hub:
- Hex bolt: 200 Nm + 180° turn. Refer to HEX BOLT BETWEEN DRIVE AXLE AND WHEEL HUB, LOOSENING AND TIGHTENING .
- Twelve point bolt with Ribs: 70 Nm + 90° turn. Refer to 12-POINT BOLT WITH RIBS BETWEEN DRIVE AXLE AND WHEEL HUB, LOOSENING AND TIGHTENING .
- Twelve point bolt without Ribs: 200 Nm + 180°. Refer to 12-POINT BOLT WITHOUT RIBS BETWEEN DRIVE AXLE AND WHEEL HUB, LOOSENING AND TIGHTENING
-- Remove the wheel.
-- Remove coil spring. Refer to COIL SPRING .
-- Remove brake caliper/brake carrier and suspend from body with wire. Refer to Removal and Installation .
Do not allow brake caliper to hang from brake line.
-- Remove cover plate.
-- Remove ABS speed sensor from wheel bearing housing.
-- Remove the bolt -2- and washer -1-.
-- Remove bolt for tie rod -1-, upper transverse link -2- and lower transverse link -3- from wheel bearing housing -4-.
-- Remove connecting link -arrow- from trailing arm.
-- Hold wheel bearing housing and remove bolts -arrows-.
-- Pull coupling rod -1- out of trailing arm.
-- Remove wheel bearing housing.
Installing
Installation is the reverse of removal, with special attention to the following:
-- Install tie rod bolt -1-, upper transverse link -2- and lower transverse link -3-.
-- Tighten the connecting link -arrow- to the trailing arm by hand.
Threaded connection of trailing arm/wheel bearing housing must only be tightened when all other components (spring and strut always) of the respective wheel suspension have been already assembled. To tighten, suspension must be unloaded. Only now do the trailing arm and wheel bearing housing move into the position required -arrows-.
Always follow the order of the following work steps!
-- Install bolt -2- with washer -1- and tighten.
-- Place trailing arm on wheel bearing housing with screws -arrows- but do not tighten yet.
-- Install coil spring, refer to COIL SPRING .
-- Tighten bolts -arrows-.
-- Tighten coupling rod -arrow- on trailing arm.
-- Install cover plate.
Bolting at wheel bearing housing may occur only when dimension "a" has been obtained. Refer to WHEEL BEARING, LIFTING TO CURB WEIGHT POSITION .
-- Tighten bolt for tie rod -1-.
-- Tighten lower transverse link bolt -3-.
-- Install bolt -3- with washer -4- and tighten.
-- Install ABS wheel speed sensor in wheel bearing housing.
-- Install brake disc.
-- Install brake carrier with brake caliper. Refer to Removal and Installation
Tightening specifications, refer to SUBFRAME, LOWER TRANSVERSE LINK, UPPER TRANSVERSE LINK, TIE ROD AND LEVEL CONTROL SYSTEM SENSOR ASSEMBLY OVERVIEW, COUPE .
Tightening specifications, refer to SUBFRAME, DIAGONAL BRACES, CROSSMEMBER, LOWER TRANSVERSE LINK, UPPER TRANSVERSE LINK, TIE ROD AND LEVEL CONTROL SYSTEM SENSOR ASSEMBLY OVERVIEW, ROADSTER .
Tightening specifications, refer to WHEEL BEARING HOUSING, WHEEL BEARING UNIT AND TRAILING ARM WITH MOUNTING BRACKET ASSEMBLY OVERVIEW .
Tightening specifications, refer to SHOCK ABSORBER AND COIL SPRING ASSEMBLY OVERVIEW .
Tightening specifications, refer to STABILIZER BAR ASSEMBLY OVERVIEW .
-- Install wheel and tighten. Refer to Specifications .
-- Vehicle alignment required, see table. Refer to WHEN WHEEL ALIGNMENT IS NECESSARY .