Removal and installation, checking of front wheel bearings (BMW 3 Series E30)

Caution: A defective wheel bearing is indicated by the appearance of noise, especially when making a sharp turn, from the side of the bearing of the wheel running along the outer radius of the turn.

Removal

Loosen the wheel bolts, raise the vehicle and remove the wheel.



Carefully remove the hub cap using a screwdriver or plastic hammer.



Use a cross-punch to straighten the locking element "arrow" of the hub nut "1".

Place the front wheel and lower the car.

Loosen the hub nut

Note: The nut is tightened with a high tightening torque, so when unscrewing it, the car must be standing with its wheels on the ground.

Remove and hang the brake caliper (see section "Removal and installation the front brake caliper/brake disc").



Remove the brake disc (see section "Removal and installation the front brake caliper/brake disc")



Press out hub "2" with the appropriate puller "3" wheels together with wheel bearings.

Attention: Removed unit (wheel hub with bearings) cannot be reinstalled.

Caution: If the inner bearing race has not come off the axle, remove the dust shield. Bend the dust shield and remove the bearing race with a puller.

Installation

If removed, install a protective shield and a new dust cover protective shield.

Screw the guide sleeve onto the axle.

Press in using BMW tool 312120 axle assembly bearing assembly.

Tighten the hub nut slightly.

Install the brake disc (see section "Removal and installation the front brake caliper/brake disc").

Install the brake caliper, see section "Removal and installation the front brake caliper/brake disc").

Place the front wheel and lower the car.

Tighten the hub nut to a tightening torque of 290 Nm and lock it. To do this, use a drift to drive the lug of the nut into the groove on the axle.

Caution: Once the nut has been tightened to the required torque, the bearing assembly cannot be reinstalled.

Install the hub cap.

Tighten the wheel bolts crosswise to 110 Nm.