Automotive Glossary
Automotive Glossary
Browse the glossary using this index
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Hydraulic PedestalSelf-adjusting support for a finger tappet in the valve opening mechanism. | |
Hydraulic PressurePressure applied by a fluid. | |
Hydraulic TappetsSelf-adjusting cam followers in valve opening mechanism. | |
Hydraulic ValvesValves used to control pressure or flow of a hydraulic fluid. | |
HydrocarbonA compound which contains only carbon and hydrogen, which are distillate by-products of petroleum, natural gas and coal. | |
Hydrocarbon (HC)Chemical compound which contains only, or principally, Carbon and Hydrogen. The principal constituent of liquid fossil fuels. | |
Hydrocarbon EmissionsFuel vapours released into the atmosphere from a vehicle exhaust or fuel tank. | |
HydrocrackTo break down (a hydrocarbon) by the process of hydrocracking. This is a catalytic cracking process of breaking down large hydrocarbon molecules into smaller ones | |
HydrolysisReaction with water. Usually refers to a decomposition process leading to paint failure. | |
HydrometerInstrument used for measuring specific gravity/relative density of a liquid (coolant, battery electrolyte). | |