ZH21 MAHLE Cylinder Head Cover

This part basically seals the top of the engine’s cylinders. Inside there, you’ve got a lot of moving parts – the camshaft, valves, all that. The cover keeps oil in where it needs to be to lubricate those parts and keep everything running smoothly. It also keeps dirt, dust, and water out – acts like a shield against the elements, really. It often incorporates the oil fill cap and sometimes even houses things like the valve cover gasket. It’s a pretty fundamental part of the engine. Without it, you’d have a massive oil leak, and all that oil would end up all over the engine and eventually on the road. It’s positioned right on top of the engine, so it's pretty visible. It contributes to the overall look under the hood too. If this cover cracks or the gasket fails, you’ll notice if you have an oil leak pretty quickly. The oil will likely drip down the side of the engine. Over time, a leak can cause serious damage, everything from a burned oil smell to engine overheating and potentially even engine failure. It’s one of those things that, when it’s good, you don't think about it. When it goes bad, you definitely notice. You can find replacements easily enough, places like Fixparts Online have a good selection. It's usually a fairly straightforward repair, but it’s best to address it early before it causes bigger problems. Highly recommended: Cylinder Head Cover (MPN ZH21) comes with a 12-month warranty!

About MAHLE

MAHLE drives advancements in vehicle efficiency and sustainability with its engine components and filtration solutions.

Why Choose MAHLE?

• MAHLE parts are built to last, using high-quality materials so you don’t have to replace them often. • We make parts for almost every type of vehicle, from everyday cars to heavy-duty trucks. • MAHLE is a trusted name in the automotive industry, with over 100 years of experience. • Our parts help improve engine performance and fuel efficiency, saving you money at the pump. Drive with confidence – choose MAHLE parts at FixParts Online.