The engine valve train is responsible for controlling the timing and movement of the engine's intake and exhaust valves. It ensures that the valves open and close at the correct intervals during the engine's cycle to facilitate efficient air and fuel intake and exhaust gas expulsion. The valve train typically consists of components like camshafts, pushrods, rocker arms, and lifters, which work together to translate the rotational motion of the crankshaft into linear motion that operates the valves. Proper functioning of the valve train is crucial for optimal engine performance, efficiency, and emissions control.
To cover the valve train assembly and prevent oil from being sprayed all over the engine compartment. It also protects the valve assembly from debris of any kind entering the lubrication system.
the heads
Variable timing valve train
As it relates to internal combustion engines, the oil pressure must be sufficient to express oil from the related orifices, and pump it to the engine heads at the top of the engine to lubricate the valve train.
Valve train clatter.
Probably worn valve train parts.
Heads and valve train
There is no valve adjustment for that engine. If you have valve clatter you must have worn valve train parts.
The valve lash is not adjustable on that engine. The rocker arms are bolted down and torqued to specs. If you have valve clatter you have worn valve train parts.
To retain the valve to the valve spring, could also be called keepers
The purpose of the valve spring is to maintain contact between the components in the valve train, so the valve motion will follow the cam profile.
The function of springs in a combustion engine is to lift the weight of the valve and to keep valves closed.