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How to Adjust Valve Clearance?

1 Answers

Percy

07/30/25 12:58am

Methods for adjusting valve clearance include the cylinder-by-cylinder adjustment method and the two-step adjustment method. The cylinder-by-cylinder adjustment method involves determining the position of a piston at the compression top dead center based on the cylinder firing order, then adjusting the intake and exhaust valve clearances for that cylinder. After adjustment, rotate the crankshaft and proceed to adjust the valve clearances for each cylinder step by step. The two-step adjustment method involves rotating the crankshaft to position the first cylinder piston at the compression top dead center, aligning the flywheel mark with the inspection hole mark. At this point, the engine valves can be adjusted. Rotate the crankshaft one full turn to position the sixth cylinder piston at the compression top dead center, then adjust the remaining valves. During adjustment, turn the adjustment screw while inserting a feeler gauge between the valve stem end and the rocker arm, moving it back and forth until slight resistance is felt.

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