Tech-Info: Cylinder Head Covers
Cylinder head covers are located at the top end of the engine. If the cylinder head cover is defective, these and the associated seals must be replaced. You can get both from VAICO: Get to know our range of cylinder head covers and gaskets.
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Function
In many modern four-stroke engines, the cylinder head cover houses the upper actuation elements of the engine control unit as well as the valves in the crankcase ventilation with all its peripheral devices.
It also prevents leakage of the lubricants in the environment. Additionally, it protects the engine from dirt or other foreign objects.
Symptoms
- Seal is leaking: Vehicles leak oil
- Smell of oil when running
- Valves blocked: jerky engine running, in extreme cases the engine light lights up until engine damage occurs
Reasons for failure
- Seals become leaky and have to be replaced
- Integrated valves for the crankcase ventilation clog up frequently
- Holders of the cylinder head covers tear if improperly mounted and also sometimes due to age
Consequential damages
- Engine oil leaks out
- The engine does not run smoothly
