Cylinder head covers
OE quality that professionals rely on - for reliable performance.
The cylinder head cover, also known as the valve cover, sits directly on the cylinder head and fulfills a central function in the engine. It reliably protects the valves, valve train and camshafts from external influences. At the same time, the cylinder head cover prevents engine oil from escaping and protects both the components and the oil from dirt, dust and contamination.
In engines with timing chains or timing belts, the cylinder head cover also shields the chain drive. Most of our cylinder head covers are equipped with integrated ventilation systems that regulate the pressure in the crankcase and safely remove excess gases. In addition, other components such as camshaft sensors can be integrated directly into the valve cover.
The cylinder head cover therefore makes a decisive contribution to clean, reliable and long-lasting engine operation and is an essential component of modern engine technology.
Benefits
Cylinder head covers – Your customer benefits at a glance:Complete and ready to install: Including installation material and pre-assembled gaskets - reduces complaints and saves workshop time.
Technology leader in injection molding: own worldwide production with plastic injection molding systems and winner of the ENGEL Award for plastics technology.
Tested technology from Germany: We test for tightness, temperature resistance, material service life and accuracy of fit on over 45 of our own test benches.
Quality that counts: Replacing the cylinder head cover is usually only necessary once or twice in a vehicle's lifetime - if it is replaced, then only with our original equipment quality.
Avoid consequential damage: Complete replacement instead of just gasket replacement - prevents leaks, material breakage and repeat visits to the workshop.
Broad vehicle coverage: Over 2,000 European vehicle models are covered by our range.
High availability: Our 98 percent adherence to delivery dates ensures smooth day-to-day business.
Efficiency in the parts business: Our complete solution with just one article number ensures fast and uncomplicated ordering and order processes.
Hengst.garage: Cylinder head cover leaking?
Our colleague Kai Wiethölter explains our new product in our new Hengst.garage video:
Replacing the cylinder head cover
The cylinder head cover (also known as the valve cover) seals the cylinder head and ensures the safe return of engine oil. Modern cylinder head covers often integrate the Crankcase Ventilation, sensors and ignition coils. In the event of visible damage, defects in the Crankcase Ventilation or in the frame of major engine repairs, we recommend replacing the entire cylinder head cover instead of just replacing the gasket.
Typical symptoms of a defective cylinder head cover:
- Oil loss due to leaking gaskets, cracks or warped material
- Uneven engine running and loss of power due to incorrect air flow
- Whistling or hissing noises due to defective Crankcase Ventilation
- Error codes and warning lights due to deviating pressure or air values
Frequent causes:
- Aged valve cover gasket that becomes brittle and allows oil to escape
- Material cracks or warping, especially with plastic valve covers due to heat and vibration
- Defective Crankcase Ventilation, which can cause excess pressure, secondary air and consequential damage
- Damaged fastenings or sensor mounts due to ageing or incorrect installation
Possible consequences of non-compliance:
A defect in the cylinder head cover can lead to increased oil consumption, contamination in the engine compartment, premature wear of camshafts, valves and timing chain and, in extreme cases, to a fire hazard due to escaping oil.
