BOMBARDIER 1980 Shop Manual page 62

SECTION 03
SUB-SECTION 02, (ENGINES)
COOLING SYSTEM
INSPECTION
Check general condition of hoses and clamp tightness.
DRAINING THE SYSTEM
To drain the cooling system, remove the coolant tank
cap .
•
WARNING: Never drain or refill the cooling system
when engine is hot.
C'onnect 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 engme 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.
(354-454 ENGINE TYPES). PAGE 4
DISASSEMBLY & ASSEMBLY
00@Apply pipe thread sealant to avoid leaks.
@See If the cap pressunzes 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 rea-
ches 43°C (110°F)
REFILLING THE SYSTEM
Capacity:
Approximately 5 liters
(1.1 Imp. gaL) (1.3 U.S. gaL)
55%
antifreeze
+
45%
water
To refill the cooling system. unscrew plug on top of
cylinder head.
Refill tank and blow Into It through the vent tube. while
maintaining the hand over the filler neck. until the liquid
comes out at the plug hole on the cylinder head.
O NOTE: It is necessary to refill tank as soon as it
becomes empty.
Screw plug on cylinder head and continue to pour the
liqUid In the coolant tank until the coolant level
reaches 25 mm (1") below filler neck.
Reinstall tank cap and start engine; let engine run until
It
reaches its operating temperature and thermostat
opens. Allow
It
to run a few minutes more. Stop engine
and check coolant level.' refill as necessary .
•
WARNING: Always unscrew cap to the first step
with a cloth to release pressure, before removing it.