Cooling System - Honda 2003 Civic Owner's Manual

Adding Engine Coolant
RESERVE TANK
If the coolant level in the reserve
tank is at or below the MIN line, add
coolant to bring it up to the MAX line.
Inspect the cooling system for leaks.
The coolant you add should always
be a mixture of 50 percent antifreeze
and 50 percent water. Never add
straight antifreeze or plain water.
Always use Honda All Season
Antifreeze/Coolant Type 2. This
coolant is pre-mixed with 50 percent
antifreeze and 50 percent water. It
does not require any additional
mixing. If it is not available, you may
use another major-brand non-silicate
coolant as a temporary replacement.
Make sure it is a high-quality coolant
recommended for aluminum engines.
However, continued use of any non-
Honda coolant can result in
corrosion, causing the cooling
system to malfunction or fail. Have
the cooling system flushed and
refilled with Honda antifreeze/
coolant as soon as possible.

Cooling System

If the reserve tank is completely
empty, you should also check the
coolant level in the radiator.
Removing the radiator cap
while the engine is hot can
cause the coolant to spray out,
seriously scalding you.
Always let the engine and
radiator cool down before
removing the radiator cap.
1. Make sure the engine and radiator
are cool.
Maintenance
CONTINUED
205