When the bypass valve is in the open position, 100 per-
cent of oil from the lubricating oil pump bypasses the
cooler.
When the oil temperature exceeds 110°C [230°F] out of
the lubricating oil pump, the bypass valve extends to
close the bypass loop in the cooler assembly. This will
force all of the oil to flow through the cooler core before
reaching the filter head.
After the oil is cooled below 107°C [225°F], the bypass
valve once again retracts to open the bypass loop, al-
lowing oil to bypass the cooler.
Lubricating Oil Filter
A combination oil filter is present on the N14. The upper
portion of the filter contains the full flow filter element
while the lower portion contains the bypass filter element.
Oil circulates through the full flow portion of the filter, into
the oil cooler housing, and is directed to the engine oil
rifles.
A smaller portion of the oil circulates through the lower
bypass portion of the filter and is dumped back to the oil
pan sump.
Section 2 - Lubricating System Lubricating System General Information
N14 Page 2-7
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