Snowmobile Arctic Cat (2004 year). Manual - part 37
3-11
3
FC072B
12. Position the O-ring into the water pump cover;
then install the cover. Secure with the screws.
Tighten to 1.1 kg-m (8 ft-lb).
FC134
Pressure Testing
Engine
1. Test the engine for air leaks using the following
procedure and Pressure Testing Kit (p/n 0144-
127).
a. Install a plug into each intake-manifold port
and tighten the flange clamps securely.
b. Place a rubber plug and cover on each exhaust
port and secure.
c. Connect the tester pump to an impulse fitting
on the crankcase; then plug any remaining
impulse fittings and pressurize the crankcase to
8 psi and close the valve.
AN128D
d. Monitor the pressure gauge. The pressure must
not drop at a rate of more than 1 psi per minute.
e. If the pressure drops faster than specified,
inspect for an air leak with soapy water or by
completely submerging the pressurized engine
in clean fresh water. Repair as needed.
Liquid Cooling System
The liquid cooling system consists of heat exchangers,
waterpump, and thermostat. The system should be
inspected for leaks or damage whenever an overheat-
ing problem is experienced.
FILLING COOLING SYSTEM
1. Elevate the front of the snowmobile 30-60 cm (12-
14 in.).
2. Remove the coolant tank cap and check coolant
level. The coolant tank should be filled to the
coolant level line.
3. Install the coolant tank cap; then start the engine.
Run the engine at 3000-3500 RPM until the
bottom heat exchangers become hot to the touch.
Stop the engine and allow the system to cool.
4. Lower the front of the snowmobile and elevate the
rear of the snowmobile 12-14 in. Repeat the
procedures in step 3.
5. Check the coolant level. Add coolant as required
to the coolant tank (coolant tank should be filled to
coolant level line). Repeat procedure until coolant
level stabilizes in the coolant tank.
! CAUTION
DO NOT exceed 8 psi pressure or damage to the
seals will result.
! CAUTION
When submerging the engine to test for air leaks,
all external electrical components must be
removed to avoid damage.
! CAUTION
Be sure the cooling system is throughly filled
using the following procedure.