Liquid Cooling System (3000/7000) - Arctic Cat Pantera 3000 Service Manual

NOTE: If the coolant level in the filler neck sud-

denly drops when the bleed screw is loosened, an
air-lock occurred in the cylinder head. Add coolant to
the filler neck until full before starting the engine.
CAUTION
Running the engine with low coolant level can cause
severe engine damage.
5. Start the engine and allow it to run for five minutes;
then shut the engine off and allow it to cool.
6. Repeat steps 5-6 at least two more times (more if
necessary) until no air is in the cooling system.
CAUTION
Operating the snowmobile with air in the cooling sys-
tem will cause severe damage to the engine.
7. Install the hood and both side panels.
INSPECTING COOLANT HOSES AND
CLAMPS
All coolant hoses and connections should be checked
annually for deterioration, cracks, and wear.
All coolant hoses and clamps should be replaced every
four years.
INSPECTING THERMOSTAT
1. Inspect the thermostat for corrosion, wear, or spring
damage.
2. Using the following procedure, inspect the thermo-
stat for proper operation.
A. Suspend the thermostat in a container filled with
water; then heat the water and monitor the tempera-
ture with a thermometer.
B. The thermostat should open at 75° C (167° F). Once
the thermostat starts to open, and allow it to cool
down verifying it has returned to the fully closed
position.
CAUTION
Never heat the thermostat to the fully open position or
damage to the thermostat may occur.
Liquid Cooling System
(3000/7000)
The liquid cooling system consists of a heat exchanger,
water pump, and thermostat. The system should be
inspected for leaks or damage whenever an overheating
problem is experienced.
DRAINING COOLING SYSTEM
1. Remove both access panels and the hood.
2. Remove the cap from the coolant filler neck; then
using a coolant vacuum pump, remove as much cool-
ant as possible from the neck.
3. Remove the hose clamp securing the coolant hose to
the bottom of the radiator; then remove the hose and
pour coolant into a container. Using the same vac-
uum pump, remove coolant from the heat
exchanger-to-radiator hose until all coolant is
removed from the snowmobile.
FILLING/BLEEDING COOLING SYSTEM
NOTE: Place the hood along side the snowmobile;

then using Hood Harness Extension, connect the hood
to the main harness.
1. With all hoses and hose clamps installed, add coolant
into the filler neck until coolant is visible at the bot-
tom of the neck; then add coolant to the coolant res-
ervoir Full-Cold line.
CAUTION
The cooling system must be properly filled. If the sys-
tem isn't properly filled, engine damage will occur.
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2. Start the engine and allow it to run until the radiator
fan turns on; then turn the engine off.
3. With the engine cool, remove the coolant cap and
verify the coolant is at the full level. If the coolant is
not at the full level, add coolant and repeat step 3 as
necessary.
CAUTION
Running the engine with low coolant level can cause
severe engine damage.
4. Install the hood and both side panels.
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