18
Cooling system
27
Cooling System Flow: Oil Cooler
• Coolant is directed out of the crankcase and into the oil filter base at
the front of the engine.
• The oil filter base routes the coolant down into the front of the oil
cooler then toward the rear of the engine.
• Once the coolant has passed through the oil cooler it is routed
up to the top of the oil cooler then directed towards the front
through a port where it is then routed down, out of the cooler,
through a port in the block.
Coolant
Inlet from
Crankcase
Inlet to
Cooler
Coolant
Outlet to
Crankcase
Outlet
from Cooler
Oil Cooler Cover
(Top View)
Oil Cooler Cover
(Bottom View)
Oil Cooler Cover
Oil Filter Base
Oil Cooler
Oil Cooler Coolant Flow
Cooling System Flow: Back of Front Cover
• Coolant is sealed via a metal one piece gasket and is
directed out of the front cover through three (3) passages.
• Two of the passages route coolant to the crankcase to cool
the cylinder walls and cylinder heads (there are different
sized orifices pressed into the crankcase in these two
passages).
• The third passage routes coolant to the oil cooler via a
passage in the crankcase.
• There are two passages for coolant to return from the
crankcase into the front cover.
COOLANT IN
(from block)
COOLANT OUT
(to block)
Coolant
Orifices
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