engine HONDA PILOT 2003 1.G Repair Manual

Make sure the engine and radiator
are cool.
Turn the radiator cap counter-
clockwise, without pressing down
on it, until it stops. This relieves
any pressure remaining in the
cooling system.
Remove the radiator cap by
pushing down and turning
counterclockwise.The coolant level should be up to
the base of the f iller neck. Add
coolant if it is low.Do not add any rust inhibitors or
other additives to your vehicle’s
cooling system. They may not be
compatible with the coolant or
engine components.
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.
Pourthecoolantslowlyand
caref ully so you do not spill. Clean
up any spills immediately. Spilled
coolant could damage components
in the engine compartment.
Put the radiator cap back on.
Tighten it f ully.
3. 4.
5.6.
1.
2.
Cooling Syst em
Maint enance288
RESERVE TANK

CONT INUED
Loosen the drain plug on the
bottom of the radiator. The
coolant will drain through the
splash guard.
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.
Turn the ignition ON (II). Set the
Climate control system to 90°F
(32°C) or turn the temperature
control dial to maximum. Turn the
ignition of f .
Openthehood.Makesurethe
engine and radiator are cool to the
touch.
Remove the radiator cap.
1.
3.
2.
Replacing Engine Coolant
Cooling Syst em
Maint enance289
DRAIN PLUG

When the coolant stops draining,
tightenthedrainplugatthe
bottom of the radiator.
Tighten the drain bolt at the rear
of the engine cylinder block
securely.
Tightening torque:
Remove the reserve tank f rom its
holder by pulling it straight up.
Drain the coolant, then put the
tank back in its holder.
Install a rubber hose on the drain
bolt in the back of the engine
block. Loosen the drain bolt. 6.
4. 5. 7.
Cooling Syst em
Maint enance290
DRAIN BOLT
RESERVE TANK
HOLDER RESERVE
TANK CAP
7 lbf·ft (10 N·m , 1.0 kgf·m)

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 cooling f an comes on
at least twice. Then stop the
engine.
Remove the radiator cap. Fill the
radiator with coolant up to the
base of the f iller neck.
Install the radiator cap, and
tighten it fully.
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: 10.
11.
12.
13. 9.
8.
Cooling Syst em
Maint enance291
FILLER NECK
Fill up to here
1.74 US gal (6.6, 1.45 Imp gal)

Fill the reservoir with a good-quality
windshield washer f luid. This
increases the cleaning capability and
prevents f reezing in cold weather.
When you ref ill the reservoir, clean
the edges of the windshield wiper
blades with windshield washer f luid
on a clean cloth. This will help to
condition the blade edges.
Check the level in the windshield
washer reservoir at least monthly
duringnormaluse.Inbadweather,
when you use the washers of ten,
check the level every time you stop
for fuel.
The low washer level indicator will
light when the level is low (see page
).
65
On Canadian models
Windshield Washers
Maint enance292
Do not use engine antif reeze or a
vinegar/water solution in the
windshield washer reservoir.
Antif reeze can damage your vehicle’s
paint, while a vinegar/water solution
can damage the windshield washer
pump.
Use only commercially-available
windshield washer f luid.

Check the f luid level with the engine
at normal operating temperature.Park the vehicle on level ground.
Shut of f the engine.
Remove the dipstick (yellow loop)
f rom the transmission and wipe it
with a clean cloth.
Insert the dipstick all the way into
the transmission.
Remove the dipstick and check the f luid level. It should be
between the upper and lower
marks.
To thoroughly f lush the
transmission, the technician
should drain and ref ill it with
Honda ATF-Z1 (Automatic
Transmission Fluid), then drive
the vehicle a short distance. Do
this three times. Then drain and
ref ill the transmission a f inal time.
The transmission should be drained
and ref illed with new f luid according
to the time and distance recommen-
dations in the maintenance schedule. Insert the dipstick all the way back
in the transmission.
If the level is below the lower
mark, add f luid into the tube to
bring it to the upper mark. Always
use Honda ATF-Z1 (Automatic
Transmission Fluid). If it is not
available, you may use a
DEXRON
III automatic
transmission f luid as a temporary
replacement. However, continued use can affect shift quality. Have
the transmission f lushed and
ref illed with Honda ATF-Z1 as
soon as it is convenient.
If you are not sure how to add f luid,
contact your Honda dealer.
1.
2.
3.
5.
6.
4.
Maint enance
Automatic Transmission Fluid
293
DIPSTICK
DIPSTICK LOWER MARK
UPPER MARK

Always use Honda Power Steering
Fluid. If it is not available, you may
use another power steering f luid as
an emergency replacement.
However, continued use can cause
increased wear and poor steering in
cold weather. Have the power
steering system f lushed and ref illed
with Honda PSF as soon as possible.
Check the level when the engine is
cold. Look at the side of the
reservoir. The f luid should be
between the UPPER LEVEL and
LOWER LEVEL. If it is below the
LOWER LEVEL, add power steering
f luid to the UPPER LEVEL. A low power steering f luid level can
indicate a leak in the system. Check
the f luid level f requently and have
the system inspected as soon as
possible.
Power Steering
Maint enance296
LOWER LEVELUPPER LEVEL
T urning the steering wheel to f ull lef t
or right lock and holding it there can
damage the power steering pump.

To replace it: The air cleaner element is inside the
air cleaner housing on the driver’s
side of the engine compartment.Disconnect the cable from the air
cleaner housing cover by pushing
the plastic clip and pulling on it.
Remove the cable from the
connector.
The air cleaner element should be
replaced according to the time and
distance recommendations in the
maintenance schedule.
Loosen the f our bolts with a
Phillips-head screwdriver.
1. 2.
CONT INUED
Replacement
A ir Cleaner Element
Maint enance297
CONNECTOR BOLTS
CLIP

Loosen the two holding clips by
turning the heads one-quarter turn
counterclockwise with a f lat-tipped
screwdriver. Remove the cover on
the f ront cylinder bank by pulling
it straight up.
Clean off any dirt and oil that have
collected around the ignition coils.
The spark plugs in your vehicle are a
special platinum-tipped design f or
longer lif e. The spark plugs should
be replaced according to the time
and distance recommendations in
the maintenance schedule.
Remove the f our bolts using a
hexagon socket wrench, then
remove the engine cover.
1.
2.
3.
CONT INUED
Replacement
Maint enance
Spark Plugs
299
HOLDING CLIP

´
µ
Torque the spark plug. (If you do
not have a torque wrench, tighten
the spark plug two-thirds of a turn
af ter it contacts the cylinder head.)
Tightening torque:Spark Plug Gap:
Install the ignition coil. Reinstall
the hexagon socket head cap bolt.
Push the wire connector onto the
ignition coil. Make sure it locks in
place.
Repeat this procedure f or the
other f ive spark plugs.
Reinstall the cover on the front
cylinder bank while putting its
mounting clip in the hole on the
passenger’s side. Secure the cover
by turning the heads of the two
holding clips one-quarter turn
clockwise with a f lat-tipped
screwdriver. NGK:
DENSO:
8. 9.
10.
11. 12. Specif ications:
Spark Plugs
Maint enance301
13 lbf·ft (18 N·m , 1.8 kgf·m)
0.04 in (1.1 mm)
PKJ16CR-L11 PZFR5F-11
0
0.1 mm
Tighten the spark plugs caref ully. A
spark plug that is too loose can
overheat and damage the engine.
Overtightening can cause damage to
the threads in the cylinder head.