BOMBARDIER 1982 Shop Manual page 84

SECTION 02 ENGINE
SUB-SECTION 04 (454 ENGINE TYPE)
1. Plug
2. Drain valve
3.
Tank support
4. Hexagonal washer head powerlock screw
114-20
x
112 (4)
5. Coolant tank
6. Hexagonal elastic stop nut 10-24 (4)
7. Clip
8.
Pressure cap
9. Overflow hose
10. Clip
11 . Heat exchangers (2)
12. Radiator protector (2)
13. Hexagonal washer head self tapping screw
10-24 x
112
(2)
INSPECTION
Check general condition of hoses and clamp tightness.
DRAINING SYSTEM
To drain the cooling system, remove the coolant tank
cap .
•
WARNING: Never drain or refill the cooling sys-
tem when engine is hot.
Connect a drain hose to the drain valve at pump housing.
Open valve and drain system.
O
NOTE: Open end of drain hose should be lower
than engine base.
However, to completely drain the system, blow into the
tank through the vent tube while blocking the tank filler
neck with one hand to prevent air leakage .
PAGE 86
14. Rivet (38)
15. Hose
16. "U" hose
17. Hose
18. Thermostat
19. Hose 3.88" (98.6 mm)
20. Hose
21. Clamp
(10)
22.
Hose 19.5 (495 mm)
23. Clamp (2)
24. Grommet
25. Sender
DISASSEMBLY & ASSEMBLY
CD CD
@ Apply pipe thread sealant to avoid leaks.
®
See if the cap pressurizes the system. If not, install a
new 13 Ibs cap, do not exceed 13 Ibs of pressure.
@
To check thermostat, put it in water and heat water.
Thermostat should open when water temperature reaches
50°C (122°Fl.
This thermostat is a "double action type":
A - Its function is to give a faster warm up of the engine
by provoking a circuit, water pump - engine - reser-
voir. This is done by closing the heat exchanger cir-
cuit.
B - When the liquid is warmed to 50°C (122°F), the ther-
mostat opens the circuit, water pump - engine -heat
exchangers - reservoir to keep the liquid at the de-
sired temperature. (See the diagram on the first
page).