Disc Rotor RUNOUT Check
WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.
- Check the front hub unit bearing for free play and runout before the inspection of brake disc front runout limit. Ref. to PROPELLER SHAFT/DRIVE SHAFT/AXLE>FRONT HUB UNIT BEARING>INSPECTION .
- Check the brake disc front runout.
- Remove the caliper body. Ref. to BRAKE>FRONT DISC BRAKE ASSEMBLY>REMOVAL .
- Secure the brake disc front by tightening the five wheel nuts.
- Set a dial gauge 10 mm (0.39 in) inward from the brake disc front outer circumference, and check the runout of front side while rotating the brake disc front.
Service limit:
0.05 mm (0.002 in)
NOTE:<Example of magnet stand and dial gauge installation>
The location where the magnet stand is installed varies to stabilize the magnet stand.
- Set a dial gauge 10 mm (0.39 in) inward from the brake disc front outer circumference, and check the runout of backside while rotating the brake disc front.
Service limit:
0.05 mm (0.002 in)
NOTE:<Example of magnet stand and dial gauge installation>
The location where the magnet stand is installed varies to stabilize the magnet stand.
- If the brake disc front runout exceeds service limit, grind the brake disc front.
- Check the brake disc front thickness after grinding. Ref. to BRAKE>FRONT DISC ROTOR>INSPECTION>DISC ROTOR THICKNESS CHECK .