CONSTRUCTION
The valve lash adjuster assemblies, which are located at the fulcrum (pivot point) of the roller rocker arms, each consist primarily of a plunger, plunger spring, check ball, and check ball spring.
Both the engine oil that is supplied by the cylinder head and the built-in spring actuate the valve lash adjuster assembly. The oil pressure and the spring force that act on the plunger push the No. 1 valve rocker arm sub-assembly against the cam, in order to adjust the clearance between the valve stem and the No. 1 valve rocker arm. This prevents the generation of noise during the opening and closing of the valves. As a result, engine noise is reduced.
| *1 | Plunger | *2 | Valve Lash Adjuster Assembly |
| *3 | Cam | *4 | No. 1 Valve Rocker Arm Sub-assembly |
| *a | Oil Passage | *b | Check Ball |
| *c | Check Ball Spring | *d | Plunger Spring |