The lift tappet is held in locked position by electromagnetic force and released by spring force. |
The valves are opened and closed by the rotation of the camshaft, which actuates the rocker arm via a hydraulic tappet and a plunger. |
The switching tappet consists of two nested housings, the inner and outer housing. |
The spring force on the guard locking pin is not sufficient to press down the lift tappet. |
Fracture of the check ball retainer in the hydraulic tappet caused the malfunction of the No. 4 cylinder exhaust valve. |
Complete closure of the valve is then assured at all times without tappet noise. |