1. Using vernier calipers, measure the thickness of the lining at a rivet head on both sides.
Thickness
0.3 mm {0.012 in} min.

2. Measure the clutch disc runout using a dial indicator.
Runout
0.7 mm {0.028 in} max.

Clutch cover inspection
Clutch release collar inspectionMazda 6 Service Manual: Condenser removal/installation
1. Disconnect the negative battery cable.
2. Discharge the refrigerant from the system. (See RECOVERY.) (See CHARGING.)
3. Remove the shroud panel. (See SHROUD PANEL REMOVAL/INSTALLATION.)
Caution
If moisture or foreign material enters the refrigeration cycle,
cooling ability will be lower ...
Mazda 6 Service Manual: Cooling system service warnings
COOLING SYSTEM SERVICE WARNINGS
Warning
Never remove the radiator cap or loosen the radiator drain plug
while the engine is running, or when the engine and radiator are hot.
Scalding coolant and steam may shoot out and cause serious injury. It may
also damage the engine and cooling sys ...