2003 HONDA S2000 coolant

Turn the ignition ON (II). Turn
the heater temperature control
dial f ully clockwise. Turn the
ignition of f .
Openthehood.Makesurethe
engine and radiator are cool to the
touch.
Remove the radiator cap.Loosen the drain plug on the
bottom of the radiator. The
coolant will drain through the
splash guard. Remove the drain
bolt and washer f rom the engine
block.
Thecoolingsystemshouldbe
completely drained and ref illed with
new coolant according to the time
and distance recommendations in
the maintenance schedule. Only use
Honda All season Antif reeze/
Coolant Type 2.
Draining the coolant requires access
to the underside of the car. Unless
you have the tools and knowledge,
you should have this maintenance
done by a skilled mechanic.
1.
2.
3. 4.
CONT INUED
Replacing Engine Coolant
Cooling Syst em
Maint enance167
DRAIN BOLT
DRAIN PLUG

Remove the reserve tank f rom its
holder by pulling it straight up.
Drain the coolant, then put the
tank back in its holder.When the coolant stops draining,
tightenthedrainplugatthe
bottom of the radiator.
Apply non-hardening sealant to the
drain bolt threads, put a new
washer on the drain bolt, and
reinstall the bolt in the engine
block. Tighten it securely.
Tightening torque:
Loosen the bleeder bolt on top of
the engine, and remove the
bleeder cap near the engine oil f ill
cap.
5. 6.
7.
Cooling Syst em
Maint enance168
RESERVE TANK CAP
HOLDER RESERVE TANK BLEEDER BOLT
61 lbf·ft (83 N·m , 8.5 kgf·m)

CONT INUED
Fill the reserve tank to the MAX
mark. Install the reserve tank cap.
Install the radiator cap, and
tighten it to the first stop.
Start the engine and let it run until
the radiator fan comes on two
times. Then stop the engine.
Pour Honda All Season
Antif reeze/Coolant Type 2 into
the radiator up to the base of the
f iller neck. This coolant is a
mixture of 50 percent antif reeze
and 50 percent water. Pre-mixing
is not required.
Pour coolant into the radiator up
to the base of the f iller neck. Start the engine and let it run f or
about 30 seconds. Then turn of f
the engine. Tighten the bleeder bolt and
reinstall the bleeder cap when
coolant comes out in a steady
stream with no bubbles.
The cooling system capacity is: 9.
10.
11. 12.
13.
14.
8.
Cooling Syst em
Maint enance169
BLEEDER CAP
Fill up to here
FILLER NECK RESERVE TANK
1.72 US gal (6.5)

Remove the radiator cap.
Pour coolant into the radiator up
to the base of the f iller neck and
into the reserve tank up to the
MAX mark.
Start the engine and hold it at
1,500 rpm until the radiator f an
comes on. Turn of f the engine.
Check the coolant level in the
radiator and add coolant if needed.
Install the radiator cap, and
tighten it fully.
If necessary, f ill the reserve tank
to the MAX mark. Install the
reserve tank cap.
15.
16.
17.
18.
19.
Cooling Syst em
Maint enance170

Open the hood.
Remove the electrical connector
f rom the bulb by squeezing the
connector to unlock the tab, then
slide the connector of f the bulb.Remove the rubber weather seal
by pulling on the tab.
If you need to change the high
beam headlight bulb on the lef t
side, remove the coolant reserve
tank f rom its holder by pulling it
straight up. Unclip the end of the hold-down
wire f rom its slot. Pivot it out of
the way and remove the bulb
socket.Install the rubber seal over the
back of the headlight assembly.
Make sure it is right side up; it is
marked ‘‘TOP.’’ Insert the socket back into the
headlight assembly. Make sure
the bulb is installed correctly by
looking through the headlight lens.
The pins on the base of the bulb
should f it in the holes in the
headlight assembly. Pivot the hold-
down wire back in place and clip
the end into the slot.
Pull the bulb straight out of its
socket. Push the new bulb straight
into the socket until it bottoms. Push the electrical connector onto
the new bulb. Turn on the
headlights to test the new bulb.
(Lef t side)
Reinstall the radiator reserve tank.
1.
2. 3.
4.
5.6.
7.
8.
9.
Lights
Maint enance199

If the temperature gauge stays at
the red mark, turn of f the engine. If you do not see steam or spray,
leave the engine running and
watch the temperature gauge. If
the high heat is due to overloading
(climbing a long, steep hill on a
hot day with the A/C running, for
example), the engine should start
to cool down almost immediately.
If it does, wait until the tempera-
ture gauge comes down to the mid-
point then continue driving.
Your car can overheat f or several
reasons, such as lack of coolant or a
mechanical problem. The only
indication may be the temperature
gauge climbing to or above the red
mark. Or you may see steam or
spray coming f rom under the car or
engine cover. In either case, you
should take immediate action. The reading on your car’s
temperature gauge should stay in
the midrange under most conditions.
Itmaygohigherif youaredrivingup
a long steep hill on a very hot day. If
it climbs to the red mark, you should
determine the reason. Saf ely pull to the side of the road.
Put the transmission in Neutral
and set the parking brake. Turn
of f the heating and cooling system
andallotheraccessories.Turnon
the hazard warning indicators.
If you see steam and/or spray
coming f rom under the hood, turn
of f the engine.Wait until you see no more signs
of steam or spray, then open the
hood.
1. 3.
4.
5.
2.
CONT INUED
If Your Engine Overheats
T aking Care of t he Unexpect ed229
Steam and spray from an
overheated engine can
seriously scald you.
Do not open the hood if steam
is coming out.
Driving with the temperature gauge
reading at the red mark can cause
serious damage to your engine.

Look f or any obvious coolant leaks,
such as a split radiator hose.
Everything is still extremely hot,
so use caution. If you f ind a leak, it
must be repaired bef ore you
continue driving (seeon page ). If you don’t f ind an obvious leak,
check the coolant level in the
radiator reserve tank (see page
). If the level is below the
MIN mark, add coolant to halfway
between the MIN and MAX marks. Using gloves or a large heavy
cloth, turn the radiator cap
counterclockwise, without pushing
down, to the f irst stop. This
releases any remaining pressure in
the cooling system. After the
pressure releases, push down on
the cap and turn it until it comes
of f .
If there was no coolant in the
reserve tank, you may also have to
add coolant to the radiator. Let the
engine cool down until the reading
reaches the middle of the
temperature gauge, or lower,
bef ore checking the radiator.
6.
7.9.
8.
245 124
Emergency
Towing
If Your Engine Overheats
T aking Care of t he Unexpect ed230
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.

Start the engine and set the
temperature control dial to
maximum. Add coolant to the
radiator up to the base of the f iller
neck. If you do not have the
proper coolant mixture available,
you can add plain water.
Remember to have the cooling
system drained and ref illed with
the proper mixture as soon as you
can.Put the radiator cap back on
tightly. Run the engine and watch
the temperature gauge. If it goes
back to the red mark, the engine
needs repair. (See
on page .) If the temperature stays normal,
check the coolant level in the
radiator reserve tank. If it has
gone down, add coolant to the
MAX mark. Put the cap back on
tightly.
10.
12.
11.
245Emergency
Towing
If Your Engine Overheats
T aking Care of t he Unexpect ed231