Drum Support: Inspection
Check drum support bushing and ring groove for wear. Measure clearance between seal ring and groove. See NISSAN DRUM SUPPORT RUNOUT SPECIFICATIONS table. Check OD cancel valve. Ensure it moves freely in bore.
NISSAN DRUM SUPPORT RUNOUT SPECIFICATIONS
| Application | In. (mm) |
|---|---|
| (1988) 300ZX & Pathfinder | .0028 (.070) |
| (1989) 300ZX & Pathfinder | .002 (.05) |
| (1988) 200SX & Van | .002 (.05) |