Lube System Flow: Oil Cooler - Ford 6.4L Power Stroke Manual

Uncooled/Unfiltered Oil
Cooled/Unfiltered Oil
Cooled/Filtered Oil
Filter Drainback Oil
Lube System Flow: Oil Cooler
• Uncooled/Unfiltered oil is directed out of the crankcase at the front
left corner of the engine via a drilled passage from the oil pump.
• Uncooled/Unfiltered oil is then directed across the
oil cooler cover then down into the oil cooler.
• The oil is then cooled via the oil cooler as it passes
through the cooler towards the front of the engine.
• The cooled/unfiltered oil is routed up through the oil cooler cover
then through the oil filter base where it enters the oil filter housing
(there is a small inlet valve in the oil filter base that the oil must
pass through to keep the oil from draining out of the filter housing
during non-operation). At this point the oil flows through the filter
(from the outside of the filter to the center) where it is cleaned.
Note: There is an oil filter bypass valve located at the top of
the oil filter stand pipe (plastic tube the oil filter slides over)
which will open and allow unfiltered oil to enter the system
whenever a pressure differential of 27 psi is reached.
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Lu b ric ati o n S y S te m
Oil Cooler Flow
Inlet/Anti-Drainback Valve
Oil Cooler Bypass Valve
Drain Valve
Oil Filter Base
• After being cleaned via the oil filter, the oil is routed through
the oil filter base and into a cavity that has ports to direct
the oil to the follwing areas: left and right oil galleries,
turbocharger oil supply, and the EOT & EOP sensors.
Note: There is a drain valve inside the oil filter base which is held
closed by the oil filter whenever the oil filter cap is tight. Whenever
this cap is loosened, the valve is allowed to open and oil will then
escape through this valve, through the oil cooler cover, and then
down through a drilled passage in the crankcase to the oil pan.
Note: There is an oil cooler bypass valve inside the oil
fllter base which will open and let uncooled oil bypass
the oil cooler and enter the oil filter housing whenever
a pressure differential of 25 psi is reached.
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Oil Cooler Cover
Oil Cooler