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Cooling System (Egs) - KTM 400 SX Owner's Handbook Manual

1998
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6
9
10
I
,
F POSSIBLE
ALWAYS CHECK LEVEL OF COOLING LIQUID WHEN ENGINE IS COLD
HAVE TO OPEN THE RADIATOR CAP
CAP AND OPEN SLOWLY TO RELEASE PRESSURE
A mixture of 40% anti freeze liquid and 60% water is used as coolant. However,
the anti-freeze protection must be at least -25° C (-13° F). This mixture offers anti-
freeze protection but also good corrosion protection and should therefore not be
replaced by pure water.
!
F
OR THE COOLING SYSTEM
C
). U
OOLANT
SING LOWER
.
LANT FOAMING
Pressure induced by heating of the coolant in the system is controlled by a valve
in the radiator cap
sible, without fear of problems.
7

Cooling system (EGS)

Coolant is circulated by a water pump located in the engine. When the engine is
cold the coolant circulates only through the cylinder and the cylinder head. After the
engine has reached its operating temperature (about 70°C, 158°F), the thermostat
7
opens and the coolant is also pumped through both aluminum radiators.
Air blowing in through the radiators cools the coolant. The slower the speed of
the motorcycle, the less the coolant is cooled down. Dirty radiators also reduce
the cooling efficiency.
If little or no air blows through the radiators, for example when riding through
slow traffic or waiting at traffic lights, the coolant temperature will rise. If the coo-
lant temperature rises to 85° C ((185°F), the fan
8
on. This fan will provide additional air circulation through the radiator thereby
preventing the cooling system from overheating.
!
I
F THE RED COOLING LIQUID TEMPERATURE WARNING LAMP LIGHTS UP
LIKELY BE DUE TO A DEFECT IN THE COOLING SYSTEM
AND TURN OFF THE ENGINE
SYSTEM FOR LEAKS
SCALDING HAZARD! D
COOLING SYSTEM
ORDER TO HAVE THE DEFECT REMEDIED
LIQUID TEMPERATURE WARNING LAMP IS LIT
I
F THE RADIATOR CAP IS REMOVED WHEN THE ENGINE IS HOT
UNDER PRESSURE
A mixture of 40% anti freeze liquid and 60% water is used as coolant. How-ever,
the anti-freeze protection must be at least -25° C (-13° F). This mixture offers anti-
freeze protection but also good corrosion protection and should therefore not be
replaced by pure water.
!
F
OR THE COOLING SYSTEM
C
). U
OOLANT
SING LOWER
.
LANT FOAMING
Pressure induced by heating of the coolant in the system is controlled by a valve
in the radiator cap
sible, without fear of problems.
WARNING
6
WHEN THE ENGINE IS HOT
.
CAUTION
,
USE ONLY WITH HIGH
-
GRADE ANTIFREEZE AGENTS
6
; a water temperature rising up to 120° C (248° F) is admis-
CAUTION
. L
ET THE ENGINE COOL DOWN AND CHECK THE COOLING
. A
LSO CHECK IF THERE IS ENOUGH COOLING LIQUID
,
O NOT DRIVE ON
UNTIL THERE IS SUFFICIENT LIQUID IN THE
. H
,
KTM'
OWEVER
CALL ON ONE OF
. I
F YOU DRIVE ON EVEN THOUGH THE COOLING
,
YOU WILL DAMAGE YOUR ENGINE
WARNING
,
CAN SPRAY OUT AND CAUSE SEVERE BURNS
CAUTION
,
USE ONLY WITH HIGH
-
GRADE ANTIFREEZE AGENTS
bk
; a water temperature rising up to 120° C (248° F) is admis-
. I
F YOU
,
USE A RAG TO COVER THE
!
-
(S
A
GRADE ANTIFREEZE
HELL
DVANCE
,
CAN CAUSE CORROSION AND COO
9
on the left radiator will switch
!
,
THIS WILL MOST
. I
,
N THIS CASE
STOP IMMEDIATELY
. CAUTION -
S DEALERS AS SOON AS POSSIBLE IN
.
,
,
HOT COOLANT
THAT IS
.
!
-
(S
A
GRADE ANTIFREEZE
HELL
DVANCE
,
CAN CAUSE CORROSION AND COO
-
27
-

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