2003 HONDA S2000 cooling

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

Run the air conditioning at least once
a week during the cold weather
months. Run it f or at least ten
minutes while you are driving at a
steady speed with the engine at
normal operating temperature. This
circulates the lubricating oil con-
tained in the ref rigerant.If the air conditioning does not get as
cold as before, have your dealer
check the system. Recharge the
system with Ref rigerant HFC-134a
(R-134a). (See Specif ications on page
.)
Your car’s air conditioning is a sealed
system. Any major maintenance,
such as recharging, should be done
by a qualif ied mechanic. You can do
a couple of things to make sure the
air conditioning works ef f iciently.
Periodically check the engine’s
radiator and air conditioning
condenser f or leaves, insects, and
dirt stuck to the f ront surf ace. These
block the air f low and reduce cooling
ef f iciency. Use a light spray f rom a
hose or a sof t brush to remove them. 251
A ir Condit ioning Syst em
Maint enance186
AIR CONDITIONING CONDENSER
Whenever you have the air conditioning
system serviced, make sure the service
f acility uses a ref rigerant recycling
system. This system captures the
ref rigerant f or reuse. Releasing
ref rigerant into the atmosphere can
damage the environment.
The condenser and radiator f ins bend
easily. Only use a low-pressure spray
or sof t-bristle brush to clean them.

Open the hood. Unclip the
windshield base by pulling it up.Put the pins on the windshield
base into their mating holes on the
support, and push the base down
until the pins snap in. Remove the old f ilter. Put a new
f ilter in the holder and push it in
until it locks.
The dust and pollen f ilter is located
in the engine compartment on the
passenger’s side near the base of the
windshield.
Push the tab on the dust and
pollen f ilter to unlock it f rom the
holder.
This f ilter should be replaced every
30,000 miles (48,000 km) under
normal conditions. It should be
replaced every 15,000 miles (24,000
km) if you drive primarily in urban
areas that have high concentrations
of soot in the air f rom industry and
diesel-powered vehicles. Replace it
more of ten if air f low f rom the
climate control system becomes less
than usual. Have the dust and pollen
f ilter replaced by your Honda dealer. The dust and pollen f ilter removes
pollen and dust f rom the outside air,
The heating and cooling system
brings air into the interior. It should
be replaced according to the time
and distance recommendations in
the maintenance schedule.
1.2.
3.
4.
Maint enance
Replacement
Dust and Pollen Filter
187

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

µ
µ
µ
µ
µ
Î
Î
No. Amps.
Amps.
No. Circuits Protected
CONT INUED
Circuits Protected
14
15
16
17
18
19
20
21
22
23
24
25
26
2710 A
10 A
7.5 A
7.5 A 10 A
15 A
7.5 A
7.5 A
7.5 A 20 A
20 A
7.5 A
15 A
10 A
20 A
7.5 A 15 A
7.5 A
15 A
7.5 A 15 A
10 A
1
2
3
4
5
6
7
8
9
10
11
12
13 Daytime Running Lights
Keyless Entry
Back-up
Interior Light
Small Lights
Radio
Starter Signal
Heater Control,
Cooling Fan Relay
Power Mirrors
Right Power Window
Lef t Power Window
Not used
Not used
Not used
Windshield Wiper,
Auto Stop Signal
Washer Motor
Not used
Not used
Accessory Socket
Windshield Wiper
Turn signal Light
ACG
Instrument Light, Back-up
Lights
Ignition Coil
Engine Start
Fuel Pump, SRS
SRS
: Canadian Model
Fuses
T aking Care of t he Unexpect ed241
I IN NT TE
ER
RI IOOR R F
FUUS SEE B
BOOX X