740 L4-2320cc 2.3L DOHC B234F (Can) (1992)
Tappet in contact with basic circle of cam
Pressurized oil from the camshaft carrier is forced into the tappet through a groove and a series of holes in the side of the component, entering the piston
through a slot in the top. Since the engine oil pressure is higher than that in the tappet cylinder, the oil also flows through the non-return valve.
Tappet operated by cam
The oil pressure in the tappet cylinder now exceeds the engine oil pressure, closing the non- return valve and making the assembly act as a solid
component.