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Polaris SPORTSMAN 400 2003 - Cooling System

Polaris SPORTSMAN 400 2003
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ENGINE
3.6
COOLING SYSTEM
WARNING: Never remove radiator cap when engine
is warm or hot. The cooling system is under pressure
and serious burns may result. Allow the engine and
cooling system to cool before servicing.
Radiator
Thermostat
Cylinder
Head
Water
Pump
Cylinder
FLOW
System Pressure Test
1. Remove front cover.
2. Remove recovery bottle hose from coolant
filler.
3. Connect a Mity Vact (PN 2870975) to
radiator and pressurize system to 10 PSI. The
system must retain 10 lbs of pressure for five
minutes or longer. If pressure loss is evident
within five minutes, check radiator, all cooling
system hoses and clamps, or water pump
seal.
Radiator Cap Pressure Test
1. Remove radiator cap and test using a cap
tester (commercially available).
2. The radiator cap relief pressure is 13 lbs.
Radiator
Left Side
View
Radiator
Front
View
Top
Bottom
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