22.01.2013, 18:25
@ holli :super! Danke.
Valve lifters are operated by the engine's camshaft and lift a pushrod that operates the valves in the cylinder head. In the Gen IV 6.0L (L76) engine, the De-Ac lifters are installed in cylinders 1, 4, 6 and 7, while the remaining cylinders use conventional lifters. The hydraulically operated De-Ac lifters have a spring-loaded locking pin, moved by oil pressure. For deactivation, hydraulic pressure dislodges the locking pin, collapsing the top portion of the lifter into the bottom and removing contact with the pushrod. The bottom of each De-Ac lifter rides up and down on the cam lobe but the top doesn't move the push rod. The valves don't operate and combustion in that cylinder stops. During reactivation, the oil pressure is removed, and the lifter locks at full length. The pushrods and the valves operate normally
Valve lifters are operated by the engine's camshaft and lift a pushrod that operates the valves in the cylinder head. In the Gen IV 6.0L (L76) engine, the De-Ac lifters are installed in cylinders 1, 4, 6 and 7, while the remaining cylinders use conventional lifters. The hydraulically operated De-Ac lifters have a spring-loaded locking pin, moved by oil pressure. For deactivation, hydraulic pressure dislodges the locking pin, collapsing the top portion of the lifter into the bottom and removing contact with the pushrod. The bottom of each De-Ac lifter rides up and down on the cam lobe but the top doesn't move the push rod. The valves don't operate and combustion in that cylinder stops. During reactivation, the oil pressure is removed, and the lifter locks at full length. The pushrods and the valves operate normally