radiator cap SUBARU IMPREZA WRX 2005 2.G Owners Manual

9-16
In case of emergency
5. Start the engine of the vehicle with the booster bat-
tery and run it at moderate speed. Then start the en-
gine of the vehicle that has the discharged battery.
6. When finished, carefully disconnect the cables in
exactly the reverse order.Engine overheating
Never attempt to remove the radiator cap until
the engine has been shut off and has fully
cooled down. When the engine is hot, the cool-
ant is under pressure. Removing the cap while
the engine is still hot could release a spray of
boiling hot coolant, which could burn you very
seriously.
If the engine overheats, safely pull off the road and
stop the vehicle in a safe place. „ If steam is coming from the engine
compartment
Turn the engine off and get everyone away from the
vehicle until it cools down. „ If no steam is coming from the engine
compartment
1. Keep the engine running at idling speed.
2. Open the hood to ventilate the engine compart- ment.

9-17
In case of emergency
– CONTINUED –
Confirm that the cooling fan is turning. If the fan is not
turning, immediately turn the engine off and contact
your authorized dealer for repair.
3. After the engine coolant temperature has dropped, turn off the engine.
If the temperature gauge stays at the overheated
zone, turn the engine off.
4. After the engine has fully cooled down, check the
coolant level in the reserve tank.
If the coolant level is below the “LOW” mark, add cool-
ant up to the “FULL” mark.
5. If there is no coolant in the reserve tank, add cool-
ant to the reserve tank. Then remove the radiator cap
and fill the radiator with coolant.
If you remove the radiator cap from a hot radiator, first
wrap a thick cloth around the radiator cap, then turn
the cap counterclockwise slowly without pressing
down until it stops. Release the pressure from the ra-
diator. After the pressure has been fully released, re-
move the cap by pressing down and turning it.Towing
If towing is necessary, it is best done by your SUBARU
dealer or a commercial towing service. Observe the
following procedures for safety.
Never tow AWD vehicles (both AT and MT) with
the front wheels raised off the ground while the
rear wheels are on the ground, or with the rear
wheels raised off the ground while the front
wheels are on the ground. This will cause the
vehicle to spin away due to the operation or de-
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11 - 8
Maintenance and service
Engine compartment overview „
2.5-liter non-turbo models
13 12 11 10 9 8 23
5
46
17USB102BB
1) Air cleaner element (page 11-
24)
2) Manual transmission oil level gauge (MT) (page 11-30) or Dif-
ferential gear oil level gauge
(AT) (page 11-35)
3) Clutch fluid reservoir (page 11-
41)
4) Automatic transmission fluid lev- el gauge (page 11-32)
5) Brake fluid reservoir (page 11- 40)
6) Windshield washer tank (page
11-56)
7) Fuse box (page 11-65)
8) Battery (page 11-63)
9) Engine coolant reservoir (page 11-19)
10) Engine oil filler cap (page 11-11)
11) Engine oil level gauge (page 11- 11)
12) Radiator cap (page 11-19)
13) Power steering fluid reservoir (page 11-38)

11 - 9
Maintenance and service
– CONTINUED –
„2.0-liter turbo models
34 5 6 7
1
2
13 12 11 10 9 8
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1) Manual transmission oil level gauge (MT) (page 11-30) or Dif-
ferential gear oil level gauge
(AT) (page 11-35)
2) Air cleaner element (page 11- 24)
3) Clutch fluid reservoir (page 11-
41)
4) Automatic transmission fluid lev- el gauge (page 11-32)
5) Brake fluid reservoir (page 11- 40)
6) Windshield washer tank (page
11-56)
7) Fuse box (page 11-65)
8) Battery (page 11-63)
9) Engine oil filler cap (page 11-11)
10) Engine coolant reservoir (page 11-19)
11) Engine oil level gauge (page 11- 11)
12) Radiator cap (page 11-19)
13) Power steering fluid reservoir (page 11-38)

11 - 1 0
Maintenance and service „
2.5-liter turbo models
34 5 6
7
1
2
12 11 10 9 8
UGB139BB
1) Manual transmission oil level gauge (MT) (page 11-30)
2) Air cleaner element (page 11- 24)
3) Clutch fluid reservoir (page 11- 41)
4) Brake fluid reservoir (page 11-
40)
5) Windshield washer tank (page 11-56)
6) Fuse box (page 11-65)
7) Battery (page 11-63)
8) Engine oil filler cap (page 11-11)
9) Engine coolant reservoir (page 11-19)
10) Engine oil level gauge (page 11-
11)
11) Radiator cap (page 11-19)
12) Power steering fluid reservoir
(page 11-38)

11 - 1 8
Maintenance and service
„
Recommended grade and viscosity
under severe driving conditions
If the vehicle is used in desert areas, in areas with very
high temperatures, or used for heavy-duty applica-
tions such as towing a trailer, use of oil with the follow-
ing grade and viscosities is recommended.
API classification SL (or SJ):
SAE viscosity No.: 30, 40, 10W-50, 20W-40, 20W-50
„ Synthetic oil
You can use synthetic engine oil that meets the same
requirements given for conventional engine oil. When
using synthetic oil, you must use oil of the same clas-
sification, viscosity and grade shown in this owner’s
manual, and must follow the oil and filter changing in-
tervals shown in the maintenance schedule.
Cooling system
Never attempt to remove the radiator cap until
the engine has been shut off and has cooled
down completely. Since the coolant is under
pressure, you may suffer serious burns from a
spray of boiling hot coolant when the cap is re-
moved.
y The cooling system has been filled at the fac-
tory with a high quality, corrosion-inhibiting,
year-around coolant which provides protection
against freezing down to –33 °F (–36 °C). For
adding, use genuine SUBARU coolant or an
equivalent: a mixture of 50% soft water and 50%
ethylene-glycol basis coolant. Use of improper
coolants may result in corrosion in the cooling
system. It is important to maintain protection
against freezing and corrosion, even if freezing
temperatures are not expected. Never mix dif-
ferent kinds of coolant. y Do not splash the engine coolant over paint-

11 -1 9
Maintenance and service
– CONTINUED –
ed parts. The alcohol contained in the engine
coolant may damage the paint surface.
„ Cooling fan, hose and connections
Your vehicle employs an electric cooling fan which is
thermostatically controlled to operate when the engine
coolant reaches a specific temperature.
If the radiator cooling fan does not operate even when
the engine coolant temperature gauge exceeds the
normal operating range, the cooling fan circuit may be
defective. Check the fuse and replace it if necessary.
If the fuse is not blown, have the cooling system
checked by your SUBARU dealer.
If frequent addition of coolant is necessary, there may
be a leak in the engine cooling system. It is recom-
mended that the cooling system and connections be
checked for leaks, damage, or looseness. „
Engine coolant
T Checking the coolant level
1) “FULL” level mark
2) “LOW” level mark
Check the coolant level at each fuel stop.
1. Check the coolant level on the outside of the reser-
voir while the engine is cool.
2. If the level is close to or lower than the “LOW” level
mark, add coolant up to the “FULL” level mark. If the
reserve tank is empty, remove the radiator cap and re-
fill as required.
FULL
LOW1 2
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11 - 2 0
Maintenance and service
1) Rubber gaskets
3. After refilling the reserve tank and the radiator, re-
install the caps and check that the rubber gaskets in-
side the radiator cap are in the proper position.
y Be careful not to spill engine coolant when
adding it. If coolant touches the exhaust pipe, it
may cause a bad smell, smoke, and/or a fire. y Do not splash the engine coolant over paint-
ed parts. The alcohol contained in the engine
coolant may damage the paint surface.
T Changing the coolant
1) Drain plug
Always add genuine Subaru cooling system condition-
er whenever the coolant is replaced.
Change the engine coolant and add genuine Subaru
cooling system conditioner using the following proce-
dures according to the maintenance schedule.
1. Remove the under cover.
2. Place a proper container under the drain plug and
loosen the drain plug.
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11 -2 1
Maintenance and service
– CONTINUED –
3. Loosen the radiator cap to drain the coolant from
the radiator. Then drain the coolant from the reserve
tank. Tighten the drain plug securely.
NOTE (Turbo model only)
The cap (without tabs) on top of the radiator does
not need to be removed. To add coolant, remove
the cap (with tabs) on the coolant tank on top of
the engine.
Never attempt to remove the radiator cap until
the engine has been shut off and has cooled
down completely. Since the coolant is under
pressure, you may suffer serious burns from a
spray of boiling hot coolant when the cap is re-
moved.
4. Install the under cover. Non-turbo models
1) Filler neck
2) Fill up to this level
1
2
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11 -2 3
Maintenance and service
– CONTINUED –
yBe careful not to spill engine coolant when
adding it. If coolant touches the exhaust pipe, it
may cause a bad smell, smoke, and/or a fire. y Do not splash the engine coolant over paint-
ed parts. The alcohol contained in the engine
coolant may damage the paint surface.
6. Pour the coolant and fill to the reservoir tank’s
“FULL” level mark.
1) Rubber gaskets 7. Put the radiator cap back on and tighten firmly. At
this time, make sure that the rubber gasket in the radi-
ator cap is correctly in place.
8. Start and run the engine for more than five minutes
at 2,000 to 3,000 rpm.
9. Stop the engine and wait until the coolant cools
down (122 to 140
°F [50 to 60 °C]). If there is any loss
of coolant, add coolant to the radiator’s filler neck and
to the reserve tank’s “FULL” level.
10.Put the radiator cap and reservoir cap back on and
tighten firmly.
1
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