OIL FILLER CAP
Closes end of oil filler neck to keep dirt out of lubrication system.
Allows access to oil filler neck.
OIL FILLER NECK
Allows addition of lubricating oil to crankcase.
LIQUID (OIL) LEVEL GAGE
Dipstick gage shows engine lubricating oil level.
Allows hot gases to escape from crankcase during engine operation.
Allows outside air to enter crankcase during engine cool down.
Keeps pressure in crankcase the same as outside air pressure at all times.
Provides reservoir for lubricating oil to be circulated through the lubrication system.