Clutch Cover Inspection

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

Remove the clutch cover. (See CLUTCH UNIT REMOVAL/INSTALLATION .)
Perform the following procedures to inspect the clutch cover.
- If it exceeds the maximum specification, replace the clutch cover. (See CLUTCH UNIT REMOVAL/INSTALLATION .)
  1. Measure the wear of the diaphragm spring fingers.
    
    Fig 1: Measuring Wear Of Diaphragm Spring
    Courtesy of MAZDA MOTORS CORP.
    
    Clutch cover diaphragm spring fingers maximum depth
    
    0.6 mm {0.02 in}
  2. Measure the flatness of the pressure plate with a straight edge and a feeler gauge.
    
    Fig 2: Measuring Flatness Of Pressure Plate With Straight Edge And Feeler Gauge
    Courtesy of MAZDA MOTORS CORP.
    
    Maximum clearance of flatness of the pressure plate
    
    0.3 mm {0.01 in}
  3. Inspect the diaphragm spring fingers for the degree of uniformity in their height.
  Fig 3: Checking Diaphragm Spring Fingers For Degree Of Uniformity In Their Height
  Courtesy of MAZDA MOTORS CORP.
  1. Install the clutch cover. (See CLUTCH UNIT REMOVAL/INSTALLATION .)
  2. When checking the diaphragm spring fingers, mount a dial gauge on the cylinder block.
  3. Rotate the flywheel and check for misaligned diaphragm spring fingers.
    Clutch cover diaphragm spring fingers maximum height difference
    
    1.0 mm {0.039 in}