Cooling System Pressure Test - Polaris MS4000 Service And Owner's Manual

ENGINE
Recommended Coolant
Use only high quality antifreeze/coolant mixed with distilled
water in a 50/50 or 60/40 ratio, depending on freeze protection
required in your area.
CAUTION: Using tap water in the cooling system will lead to
a buildup of deposits which may restrict coolant flow and reduce
heat dissipation, resulting in possible engine damage. Polaris
Premium 60/40 Antifreeze/Coolant is recommended for use in
all cooling systems and comes pre-mixed, ready to use.
Thermostat
Cylinder
Head

Cooling System Pressure Test

1. Lift up the front hood.
2. Remove the pressure cap from the radiator and pressure test
the cooling system using a commercially available tester.
3. The system must retain 10 psi for five minutes or longer.
If pressure loss is evident within five minutes, check
radiator, all cooling system hoses and clamps and water
pump seal for leakage.
Coolant Flow Diagram
3.14
Radiator
Water
Pump
Cylinder
To Water Pump
Radiator Cap Pressure Test
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
1. Remove radiator pressure cap and test using a cap tester
(commercially available).
2. The radiator cap relief pressure is 13 lbs. Replace cap if it
does not meet this specification.
From
Thermostat Housing
WARNING
before servicing.
Radiator Cap
Surge Tank
Radiator