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The other half of each main bearing was placed in the main caps and the bearings were lubricated and the caps installed. Each cap is numbered and features an arrow, which should face the front of the engine. After installing each cap, remember to check to make sure the crank turns freely. If the crank hangs up or binds, remove the cap and inspect. In the case where the crank will not turn at all, it may be necessary to align hone the crankshaft mains.