Cooling System; Checking The Coolant Level; Bleeding The Cooling System - KTM 250 EXC RACING 2004 Owner's Manual

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10 mm
bei kaltem Motor
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Cooling system

Coolant is circulated by a water pump
engine is cold the coolant only circulates through the cylinder and the cylin-
der head. After the engine has reached its operating temperature (about
70°C, 158°F), the thermostat
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.
Pressure induced by heating of the coolant in the system is controlled by a
valve in the radiator cap
(248° F) is admissible, without fear of problems.
– I ,
F POSSIBLE
I
F YOU HAVE TO OPEN THE RADIATOR CAP
TO COVER THE CAP AND OPEN SLOWLY TO RELEASE PRESSURE
.
HAZARD
– D
O NOT DETACH ANY RADIATOR HOSES WHILE THE ENGINE IS HOT
HOT COOLANT AND THE STEAM MAY CAUSE SERIOUS BURNS
– I
N CASE YOU GET BURNT
COLD WATER RIGHT AWAY
– C
OOLANT IS TOXIC
– I
N CASE COOLANT IS INGESTED
– I
F COOLANT GETS INTO YOUR EYES
AND CONSULT DOCTOR
A mixture of 40% antifreeze liquid and 60% water is used as coolant.
However, the antifreeze protection must be at least -25° C (-13° F). This
mixture offers antifreeze protection but also good corrosion protection and
should therefore not be replaced by pure water.
!
– I
F THE COOLANT HAS BEEN DRAINED
THE COOLING SYSTEM DURING FILLING
– F
OR THE COOLING SYSTEM
A F
NTI REEZE
CORROSION AND COOLANT FOAMING
– E
XTREME CLIMATE CONDITIONS OR STOP AND GO
. T
PROBLEMS
ELECTRIC STARTERS

Checking the coolant level

The coolant should be 10 mm (0.4 in) above the radiator fins when the
engine is cold (see diagram). In the event of the coolant being drained,
always fill and bleed the system.
!
I
F THE COOLANT HAS BEEN DRAINED
COOLING SYSTEM DURING FILLING

Bleeding the cooling system

By removing the screw
coolant.
To bleed the cooling system, fill in approx. 0.8 liters (0.2 US gallons) of
coolant and remove the bleeder screw
until coolant escapes at the bore without any bubbles.
Then, fill in the coolant until it reaches a level about 10mm above the
radiator fins.
After a short ride, check the coolant level once more.
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located in the engine. When the
2 opens and the coolant is also pumped
3
; a water temperature rising up to 120° C
WARNING
ALWAYS CHECK LEVEL OF COOLING LIQUID WHEN THE ENGINE IS COLD
3
,
HOLD THE AFFECTED PART OF YOUR BODY UNDER RUNNING
.
. K
EEP THE COOLANT OUT OF THE REACH OF CHILDREN
,
CONSULT A DOCTOR IMMEDIATELY
,
RINSE THEM OUT WITH WATER IMMEDIATELY
.
CAUTION
,
IT WILL BE ABSOLUTELY NECESSARY TO BLEED
(
SEE BELOW
,
USE ONLY HIGH
). U -
SING LOWER GRADE
.
,
O AVOID THIS AN ELECTRIC BLOWER
( KTM D )
ASK YOUR EALER
CAUTION
,
IT WILL BE ABSOLUTELY NECESSARY TO BLEED THE
( ).
SEE BELOW
5
at the front end of the cylinder you can drain the
6
. Do not reinstall the bleeder screw
,
WHEN THE ENGINE IS HOT USE A RAG
. C -
AUTION SCALDING
. T
HE ESCAPING
.
.
.
!
).
- ( . . M
GRADE ANTIFREEZE E G OTOREX
ANTIFREEZE AGENTS CAN CAUSE
T
RAFFIC MAY CAUSE OVERHEATING
4
IS OFFERED FOR MODELS WITH
!
.
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