Oil
Filler Cap
The oil filler cap is a plastic or
metal cap that covers an opening into the valve cover. It allows you to
add oil when the dipstick indicates that you need it. Some cars have the
crankcase vented through the filler cap. Oil which is added through the
filler passes down through openings in the head into the oil sump at the
bottom of the engine.
Oil Gauge
The Oil Gauge lets you know the pressure
in the oil pump; and is a direct indicator of the condition of your
engine. If the oil gauge gives very low readings, it means that your oil
pressure has dropped. The engine would soon grind to a halt if the oil
is not forced into the nooks and crannies that need to be oiled.
Overhead
Valve (OHV)
In an overhead valve (OHV) engine, the
valves are mounted in the cylinder head, above the combustion chamber.
Usually this type of engine has the camshaft mounted in the cylinder
block, and the valves are opened and closed by push rods.
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