Oil Cooler; Operating Pressure Of Regulators - Suzuki Katana 1100 Service Manual

4-15 FUEL AND LUBRICATION SYSTEM
OIL COOLER
• Oil Pressure Regulator: The oil pressure regula ­
tor is threaded into the oil passage in the oil pan.
• Relief Valve: A relief valve is mounted in the oil
pan, in a parallel circuit with the oil cooler; when
the relative oil pressure between the entrance
and exit to the oil cooler exceeds 6.0 kg/cm 2
(600 kPa), the relief valve operates.
Low Engine Oil Temperature
When engine oil temperature is low, oil viscosity
is high, and there is a great loss of pressure
inside the oil cooler. When the relative pressure
of the entrance and exit is greater than 6.0
kg/cm
2
,
the relief valve operates, bringing oil
directly from the oil pump to the oil filter.
High Engine Oil Temperature
When engine oil temperature is high, oil viscosi ­
ty is low, and relative pressure drops below 6.0
kg/cm 2 (600 kPa). In this case, the relief valve
does not operate, this allows the oil to be cooled
by flowing through the oil cooler before passing
on to the oil filter.
• Oil Cooler: An oil cooler is used to maintain
engine oil temperature within the optimum
range by compensating for the heat produced
by the engine.
OPERATING PRESSURE OF REGULATORS
ITEM kg/cm 2 kPa
For lubrication 6.5 650
For cooling
5.0 500