Operation CHARM: Car repair manuals for everyone.
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Clutch Break-In

After a new clutch has been installed cycle the A/C clutch 20 times (5 seconds ON and 5 seconds OFF). During this procedure, set the system to the A/C mode, engine rpm at 1,500-2,000, and high blower speed. This procedure (burnishing) will seat the opposing friction surfaces and provide a higher clutch torque capability.