Side Housing (Front, Intermediate, Rear) Inspection

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Inspect the intermediate housing for clogging in the intake and exhaust port.
CAUTION:
- Carefully inspect the anti-wet port of the intermediate housing since it is an essential port.
- If there is any malfunction, replace the corresponding side housing.
Fig 1: Inspecting Intermediate Housing
Courtesy of MAZDA MOTORS CORP.
Inspect the side housing for distortion in four positions as shown in the figure using a straight edge and a feeler gauge.
- If the distortion exceeds the maximum, replace the corresponding side housing.
Maximum Distortion
1. 0.04 mm {0.0016 in}
Fig 2: Inspecting Side Housing For Distortion
Courtesy of MAZDA MOTORS CORP.
Inspect the following three items related to wear in the areas where the rotor contacts the side housing using a dial gauge.
- If any one of the items exceeds the maximum, replace the corresponding side housing.

Vertical wear.
Maximum Wear
1. 0.10 mm {0.0039 in}
  
  Fig 3: Checking Vertical Wear
  Courtesy of MAZDA MOTORS CORP.
Convex oval.
Maximum Wear
1. Oil Seal Inner Path (A): 0.01 mm {0.0004 in}
2. Oil Seal Outer Path (B): 0.10 mm {0.0039 in}
  
  Fig 4: Checking Convex Wear
  Courtesy of MAZDA MOTORS CORP.
Oil seal stepped path wear.
Maximum Wear
1. 0.02 mm {0.0008 in}
  
  Fig 5: Checking Oil Seal Stepped Path Wear
  Courtesy of MAZDA MOTORS CORP.