What is the mnemonic for the valve adjustment sequence of a 6-cylinder engine?
1 Answers
The mnemonic for the valve adjustment sequence of a 6-cylinder engine is 1-5-3-6-2-4. Meaning of the adjustment sequence: When the piston of cylinder 1 is at top dead center, cylinders 5 and 3 are exhaust ports, while cylinders 2 and 4 are intake ports. When the crankshaft rotates 360 degrees, cylinders 5 and 3 become intake ports, and cylinders 2 and 4 become exhaust ports. Method for adjusting valve clearance: Rotate the crankshaft to position the piston of cylinder 1 at compression top dead center, aligning the flywheel mark with the inspection hole mark. At this point, valves 1, 2, 4, 5, 8, and 9 can be adjusted. Rotate the crankshaft one full turn to position the piston of cylinder 6 at compression top dead center, then adjust valves 3, 6, 7, 10, 11, and 12. During adjustment, turn the adjusting 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.