2004 Acura RL cooling

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 f or leaks.
The coolant you add should always
be a mixture of 50 percent antif reeze
and 50 percent water. Never add
straight antif reeze or plain water.If the reserve tank is completely
empty, you should also check the
coolant level in the radiator.
Make sure the engine and radiator
are cool.
Always use Honda All Season
Antif reeze/Coolant Type 2. This
coolant is pre-mixed with 50 percent
antif reeze 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 f or aluminum engines.
However, continued use of any non-
Honda coolant can result in
corrosion, causing the cooling
system to malf unction or f ail. Have
the cooling system f lushed and
ref illed with Honda antif reeze/
coolant as soon as possible.
1.
A dding Engine Coolant
Cooling Syst em
Maint enance256
RESERVE TANK
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.

The coolant level should be up to
the base of the f iller neck. Add
coolant if it is low.
Remove the radiator cap by
pushing down and turning
counterclockwise. Turn the radiator cap counter-
clockwise, without pressing down
on it, until it stops. This relieves
any pressure remaining in the
cooling system. Put the radiator cap back on.
Tighten it f ully.
Pour coolant into the reserve tank.
Fill it to half way between the MAX
and MIN marks. Put the cap back
on the reserve tank.
Do not add any rust inhibitors or
other additives to your car’s cooling
system. They may not be compatible
with the coolant or engine compo-
nents.
Pour the coolant slowly and caref ully
so you do not spill. Clean up any
spills immediately. Spilled coolant
could damage components in the
engine compartment.
2.
3.
4.5.
6.
CONT INUED
Cooling Syst em
Maint enance257
RADIATOR CAP
RESERVE TANK

Loosen the drain plug on the
bottom of the radiator. The
coolant will come out through the
hole in the splash cover.
Turn the ignition ON (II). Turn
the heater temperature control
dial to maximum heat (climate
control to 90°F/32°C). Turn of f
the ignition. Open the hood. Make
sure the engine and radiator are
cool to the touch.
Remove the radiator cap.
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. Use of any non-
Honda coolant or plain water can
result in corrosion and deposits in
the cooling system.
Draining the coolant requires access
to the underside of the vehicle.
Unless you have the tools and
knowledge, you should have this
maintenance done by a skilled
mechanic.
1.
2.3.
Replacing Engine Coolant
Cooling Syst em
Maint enance258
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.
Put the drain cap back in place
tightly, then reinstall the clip on
the drain cap securely.
On the right side of the engine
block, remove the clip with a plier,
andthenremovethedraincap. 5.
4. 6.
CONT INUED
Cooling Syst em
Maint enance259
CLIP
RESERVE TANK
HOLDER
RESERVE TANK CAP
DRAIN CAP

Remove the two bolts and the
three nuts with a 7/16 in (10 mm)
wrench, then remove the engine
cover.Loosen the bleeder bolt on top of
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.
The cooling system capacity is:
Tighten the bleeder bolt when
coolant comes out in a steady
stream with no bubbles.
7. 8. 9.
10.
Cooling Syst em
Maint enance260
BLEEDER BOLT
BOLTS NUTS
1.61 US gal (6.1)

Install the engine cover. First
tighten the two bolts on the front
of the engine cover, then tighten
the three nuts on the engine cover.
Tightening torque:
Install the radiator cap, and
tighten it to the first stop.
Start the engine and let it run until
the radiator cooling f an comes on
at least twice. Then stop the
engine.
Fill the reserve tank to the MAX
mark. Install the reserve tank cap.
Check the level in the radiator,
add coolant if needed. 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 cooling f an
comes on. Turn of f the engine.
Check the coolant level in the
radiator and add coolant if needed.
12. 11. 13.
14.
15. 16.
17.
CONT INUED
Cooling Syst em
Maint enance261
Fill up to here FILLER NECK
7 lbf·ft (9.8 N·m , 1.0 kgf·m)

Install the radiator cap, and
tighten it fully.
If necessary, f ill the reserve tank
to the MAX mark. Install the
reserve tank cap.
18.
19.
Cooling Syst em
Maint enance262
RESERVE TANK

Make sure the climate control sys-
tem is off.
Start the engine and let it run until
it warms up (the radiator cooling
fan comes on at least twice), and
let it idle f or f ive more minutes.
If your car’s battery is disconnected
or goes dead, the engine’s computer
needs to ‘‘relearn’’ the idle control.
Af ter replacing or recharging the
battery:
Your driver’s power window (see
page ) and your audio system
will also disable itself when the bat-
tery is disconnected or goes dead.
Thenexttimeyouturnontheradio
you will see ‘‘ ’’ in the f requency
display. Use the Preset buttons to en-
ter the f ive-digit code (see page ).If your car’s battery is disconnected
or goes dead, all stored driving
positions will be lost. To store the
driving positions again, see the
storingprocedureonpage .
The Navigation System will also
disableitself.Thenexttimeyouturn
on the ignition switch, the system
will require you to enter a PIN
bef ore it can be used. Ref er to the
Navigation System Owner’s Manual.
1.
2. 103
98
180On cars with Navigation System
Battery
Maint enance274
Charging the battery with the cables
connected can seriously damage your
car’s electronic controls. Detach the
battery cables bef ore connecting the
battery to a charger.