Removing
Mark the position of the front wheels relative to the hub so that the balanced wheels take their original position during installation. For marking, it is enough to make a stroke with chalk or paint on the disc and hub.
Loosen the front wheel bolts, raise the front of the car, remove the wheels.
Remove brake pads.
For vehicles with spring brake pads, hang the brake caliper on a wire.
Loosen the fixing bolt from the hub.
Slightly tilt and remove the brake disc. On vehicles with pinned brake pads, pull the brake caliper slightly outwards.
Installation
To ensure uniform braking on both sides, both brake discs must be of the same thickness and have the same surface roughness. Therefore, it is imperative to replace or grind both discs.
In the workshop, you can check the runout of the brake disc. The maximum allowable axial runout measured on the working surface is 0.03 mm with the disc removed and 0.1 mm with the disc installed. The maximum allowable roughness is 0.4 mm, and the allowable difference in thickness between the discs is 0.1 mm.
Measure the brake disc thickness.
If necessary, remove traces of corrosion from the brake disc and the corresponding wheel hub.
Wash new discs with solvent.
Clean the threaded hole of the fixing bolt, if necessary using a tap. Coat the fixing bolt with sealant, e.g. Opel 1510177.
Install the brake disc on the hub and tighten with a torque of 4 Nm.
For vehicles with spring-loaded brake pads, tighten the caliper with a torque of 95 Nm.
Install brake pads.
Install the wheel, lower the vehicle and tighten the wheel bolts crosswise to 110 Nm.
Attention! Press the brake pedal several times until resistance occurs.
Check the brake fluid level in the reservoir, top up if necessary "MAX".
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