Measure clutch disc runout and backlash. If either measurement exceeds the specification, replace clutch disc (for QR25DE engine models) or clutch disc and clutch cover as a set (for VQ35DE engine models).
Check clutch disc for burns, discoloration or oil or grease leakage. Replace if necessary.
Determine the clutch facing wear limit (depth to the rivet head). If measurement exceeds specifications, replace clutch disc (for QR25DE engine models) or clutch disc and clutch cover as a set
Check clutch cover installed on vehicle for unevenness of diaphragm spring toe height. If unevenness exceeds specifications, adjust the height using Tool (A).
Check clutch cover thrust ring for wear or breakage. If wear or breakage is found, replace clutch cover (for QR25DE engine models) or clutch disc and clutch cover as a set (for VQ35DE engine models).
NOTE:
Worn thrust ring will generate a beating noise when tapped at the rivet using suitable tool.
Broken thrust ring will make a clinking sound when cover is shaken up and down.
If a trace of burn or discoloration is found on clutch cover pressure plate to clutch disc contact surface, repair the surface with sandpaper. If surface is damaged or distorted, replace clutch cover (for QR25DE engine models) or clutch disc and clutch cover as a set (for VQ35DE engine models).
