Cooling System - Honda 1990 Accord Sedan Owner's Manual

Cooling System

The engine in your Honda contains a number of aluminum
parts. Therefore, it requires an antifreeze/coolant specifically
formulated to protect the aluminum parts from corrosion.
Failure to use a suitable antifreeze/coolant may seriously
shorten the life of the engine as the result of rapid corrosion
damage. Some antifreeze/coolants, although labeled for use in
engines containing aluminum, may not provide adequate pro-
tection for your engine.
Therefore, use only a Honda RECOMMENDED antifreeze/
coolant.
CHECK WITH YOUR AUTHORIZED HONDA DEALER.
For best corrosion protection, the mixture of coolant and water
must be maintained year-round at 50/50. Concentrations less
than 50% coolant may not provide sufficient protection
against corrosion and freezing. Concentrations of greater than
6 0 % coolant will impair cooling efficiency and are not recom-
mended. Low-mineral drinking water or distilled water should
be mixed with the antifreeze/coolant. Coolant loss should be
replenished by a mixture containing the proper concentration
of antifreeze and water.
Do not mix different antifreeze/coolants.
Do not use additional rust inhibitors or anti-rust products, as
they may not be compatible with the radiator coolant.
ENGINE DAMAGE CAUSED BY IMPROPER COOLANT USAGE
IS NOT COVERED BY THE NEW CAR WARRANTY.
Checking Coolant
Check the coolant level in the reserve tank when the engine is
at normal operating temperature.
If the level is below the MAX
mark, but still visible, add a
50/50 solution of antifreeze
and water to bring it up to
MAX.
If there is no coolant in the
reserve tank, the cooling
system should be checked
for leaks and repaired if
necessary.
then be added
radiator.
Coolant must
to the
RESERVE TANK