Hyundai Matrix 2003 Owner's Manual page 143

G050D01FC
4. Turn the radiator cap counterclockwise with-
out pressing down on it, until it stops. This
relieves any pressure remaining in the cool-
ing system. And remove the radiator cap by
pushing down and turning counterclockwise.
Now fill the radiator with clean demineralized or
distilled water. Continue to add clean deminer-
alized or distilled water in small quantities until
the fluid level stays up in the radiator neck.
G050D02FC
6-10
DO-IT-YOURSELF MAINTENANCE
5. Start the engine, top off the radiator with
water and then add engine coolant to the
reservoir until the level is between "LOW"
and "FULL".
6. Replace the radiator and reservoir caps and
check to be sure the drain cocks are fully
closed and not leaking.
WARNING:
The cooling fan is controlled by engine cool-
ant temperature and may sometimes oper-
ate even when the engine is not running.
Use extreme caution when working near the
blades of the cooling fan so that you are not
injured by a rotating fan blade. As the en-
gine coolant temperature decreases, the fan
will automatically shut off. This is a normal
condition.
G060B02S-GAT
REPLACING THE SPARK PLUGS
Unleaded: 1.0 ~ 1.1 mm (0.039 ~ 0.043 in.)
Leaded: 0.7 ~ 0.8 mm (0.028 ~ 0.032 in.)
SSA6060A
The spark plugs should be changed at the
intervals specified in the vehicle maintenances
schedule in Section 5 or whenever engine per-
formance indicates they should be changed.
Symptoms that suggest poor spark plug perfor-
mance include engine misfiring under load, loss
of fuel economy, poor acceleration, etc. When
spark plugs are replaced, always use spark
plugs recommended by Hyundai. The use of
other spark plugs can result in loss of perfor-
mance, radio interference or engine damage.
NOTE:
When replacing the spark plugs, genuine
Hyundai replacement parts are recom-
mended.
Recommended Spark Plugs:
Unleaded
Leaded
engine
engine
CHAMPION RC10YC
RC10YC4
NGK
BKR5ES-11 BKR5ES