Coolant Replacement - Honda CRF450R 2009 Service Manual

COOLING SYSTEM
RADIATOR CAP/SYSTEM PRESSURE
INSPECTION
Remove the radiator cap (page 7-7).
WeI the saaling
Install the radiator cap on the lester.
surface
wlrh waler,
Pressure test the radiator cap.
Replace the radiator cap
if it
does not hold pressure, or
if
the relief pressure is too high or too low.
It must hold the specified pressure for at least 6
seconds.
RADIATOR CAP RELIEF PRESSURE:
108 - 137 kPa (1 .1 - 1.4 kgf/cm2, 16 - 20 psi)
Pressurize the radiator, engine and hoses, and check
for leaks.
I
NOTICE
I
Excessive pressure can damage the cooling system
components. Do not exceed 137 kPa (1.4 kgflcnT,
20 psi).
Repair or replace componen ts
if
the system will not hold
the specified pressure for alleas! 6 seconds.
After checking the pressure, install the radiator cap
securely.
COOLANT REPLACEMENT
PREPARATION
7-8
The effectiveness of coolant decreases with the
accumulation of rust or if there is a change in the
mixing proportion during usage. Therefore, for best
performance, change the coolant regularly as
specified in the maintenance schedule.
Mix only distilled, low mineral water with the
antifreeze.
RECOMMENDED ANTIFREEZE:
Pro Honda HP Coolant or an equivalent high
quality ethylene glycol antifreeze containing
corrosion protection inhibitors
RECOMMENDED MIXTURE :
1:1 Mixture with distilled water
D¥~
ANTIFREEZE
Ir-
LOW MINERAL
OR DISTILLED
(ETHYLENE
GLYCOL BASE
SOLUTION)
WATER
~LANT