Your cylinder head, or cylinder heads if you have V engine, is an important bit of kit. It’s where the air and fuel a passed through to the valves, which in turn deliver that all important mix to the cylinder block. It does this by playing home to the valves, which again are deeply important.
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The dictionary defines an engine as a machine with moving parts that converts power into motion. That being so, when we consider how a car engine works we can ignore many of the extra parts (the water pump, the alternator, the starter motor and so on) that many people would also consider to be a...