Chapter 3. Cooling System; Coolant; Coolant Level; Coolant Type - Yamaha SRX440 1980 Service Manual

1980 SRX440
CHAPTER 3. COOLING SYSTEM
3-1. COOLANT
A. Coolant level
W A R N I N G : - - - - - - - - - - - .
Do not remove the rdiator cap when the
engine and radiator are hot.
Check the coolant level in the reservoir tank
when the engine is cold.
If the reservoir tank level is low. add coolant.
(Refer to D. Replenishing coolant).
1. Reservoir tank
B. Coolant type
The coolant is a mixture of tap water and an-
tifreeze. You may use an antifreeze sold in
the market. but the coolant should be pre-
pared by taking into account the relation be-
tween the mixing ratio and freezing point.
Cooling system capacity:
2500 em'
When the mixing ratio of tap water to an-
tifreeze is 1 1 (50% water 50% antifreeze).
the freezing point is -40°C (-40° F).
This mixture can be used in almost all
snowmobile conditions.
C A U T I O N : - - - - - - - - - - .
1) In an area where the temperature is
below -40°C (-40°F), the water-
jantifreze mixing ratio should be 2 :
3 (40% water 60% antifreeze).
2) Do not use water containing im-
pu rities
0
r oi
I.
3-2
C. Draining coolant
1. When the coolant is still hot, slowly
loosen the radiator cap to lower the
pressure in the radiator. Take care not
to allow the coolant to spout out.
2. Remove the drain bolt on the exhaust
side of the cylinder, and let it run into a
container so that the cylinder head and
cylinder water jackets and radiator are
completely drained off.
Drain bolt tightening torque:
30 Nm (3.0 m-kg)
3. The coolant in the heat exchanger and
water pump located below the drain
bolt should be drained. To drain. remove
the by-pass pipe secured to the
thermostat housing by the clip, and hold
the by-pass pipe end facing downward.