Wheel, Changing And Mounting

-- Make sure the contact surfaces -arrows- on the brake disc are free from corrosion and dirt.

Fig 1: Checking Disc Brakes For Corrosion And Dirt

Courtesy of VOLKSWAGEN UNITED STATES, INC.

-- Make sure the contact surfaces -arrow- on the brake disc center seat are free of corrosion and dirt.

Fig 2: Checking Disc Brake Center Seat For Corrosion And Dirt

Courtesy of VOLKSWAGEN UNITED STATES, INC.

-- Make sure the contact surface -arrow- on the wheel inner side (rim) as well as the central seat in the rim is free of corrosion and dirt.

Fig 3: Checking Inner Wheel Rim And Central Seat Rim For Corrosion And Dirt

Courtesy of VOLKSWAGEN UNITED STATES, INC.

-- The spherical caps ^* in the wheel bolt openings and the wheel bolt threads must likewise be free of corrosion, dirt, oil or grease.

^* The spherical cap is the curved surface of a section of a sphere.

-- Check whether the wheel bolts can be easily screwed in by hand. The threads of the wheel bolts must not touch the holes in the brake disc -arrow-.

Fig 4: Checking Wheel Threading And Inner Rim For Dirt And Corrosion

Courtesy of VOLKSWAGEN UNITED STATES, INC.

If the thread of the wheel bolt touches the hole -arrow-, turn the brake disc relative to the wheel accordingly.

Wheel Mounting 

-- Coat the wheel centering seat with corrosion protection. Refer to WHEEL CENTERING SEAT, PROTECTING AGAINST CORROSION .

Fig 5: Identifying Incorrect Tightening Method

Courtesy of VOLKSWAGEN UNITED STATES, INC.

1. When mounting a wheel, tighten all wheel bolts uniformly by hand.
2. Tighten the wheel bolts diagonally to 30 Nm.
3. Place the vehicle on the floor and tighten all of the wheel bolts in a diagonal sequence to the specification with a torque wrench. Refer to WHEEL BOLT TIGHTENING SPECIFICATION .