2005 SUBARU IMPREZA WRX service

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
UGB508BB

11 - 2 2
Maintenance and service
Turbo models
1) Filler neck
2) Fill up to this level
5. Slowly pour the coolant and fill up to just below the
filler neck, allowing enough room to add genuine
Subaru cooling system conditioner in the radiator. Add
genuine Subaru cooling system conditioner until the
coolant level reaches the filler neck. Do not pour the
coolant too quickly, as this may lead to insufficient air
bleeding and trapped air in the system.
Guideline of coolant quantity (including coolant in reservoir
tank): Non-turbo models: MT. 7.4 US qt (7.0 liters, 6.2 Imp qt)
AT. 7.3 US qt (6.9 liters, 6.1 Imp qt)
Turbo models: MT. 8.1 US qt (7.7 liters, 6.8 Imp qt)
AT. 8.0 US qt (7.6 liters, 6.7 Imp qt)
1) “FULL” level mark
2) “LOW” level mark
1
2
UGB140BB
FULL
LOW1 2
UGB134BB

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
HSB026BB

11 - 2 4
Maintenance and service
Air cleaner element
The air cleaner element functions as a filter screen.
When the element is perforated or removed, engine
wear will be excessive and engine life shortened.
The air cleaner element is a viscous type. It is unnec-
essary to clean or wash the element.
Do not operate the engine with the air cleaner
element removed. The air cleaner element not
only filters intake air but also stops flames if the
engine backfires. If the air cleaner element is
not installed when the engine backfires, you
could be burned.
„ Replacing the air cleaner element
Replace the air cleaner element according to the
maintenance schedule in the “Warranty and Mainte-
nance Booklet”. Under extremely dusty conditions, re-
place it more frequently. It is recommended that you
always use genuine SUBARU parts. T
Non-turbo models
1. Unsnap the two clamps holding the air cleaner
case cover.
UGB092BA

11 -2 5
Maintenance and service
– CONTINUED –
2. Push the air cleaner case cover in the direction of
the arrow shown in the drawing. 1) Air cleaner case cover
2) Air cleaner element
3. Open the air cleaner case cover and remove the air
cleaner element.
4. Clean the inside of the air cleaner cover and case
with a damp cloth and install a new air cleaner ele- ment.
UGB104BA
1
2
UGB093BB

11 - 2 6
Maintenance and service
5. To install the air cleaner case cover, insert the
three projections on the air cleaner case into the slits
on the air cleaner case cover and then snap the two
clamps on the air cleaner case cover.
T
Turbo models
1. Unsnap the two clamps holding the air cleaner
case cover.
UGB094BA
USB521BA

11 -2 7
Maintenance and service
– CONTINUED –
1) Air cleaner case cover
2) Air cleaner element
2. Open the air cleaner case cover and remove the air
cleaner element.
3. Clean the inside of the air cleaner cover and case
with a damp cloth and install a new air cleaner ele- ment. 4. To install the air cleaner case cover, insert the two
projections on the air cleaner case cover into the slits
on the air cleaner case and then snap the two clamps
on the air cleaner case cover.
21
UGB126BBUSB523BA

11 - 2 8
Maintenance and service
Spark plugs
It may be difficult to replace the spark plugs. It is rec-
ommended that you have the spark plugs replaced by
your SUBARU dealer.
The spark plugs should be replaced according to the
maintenance schedule in the “Warranty and Mainte-
nance Booklet”.
y
When disconnecting the spark plug cables,
always grasp the spark plug cap, not the ca- bles. y
Make sure the cables are replaced in the cor-
rect order.
„ Recommended spark plugs
2.5-liter non-turbo models:
FR5AP-11
2.0-liter turbo models:
PFR6G (NGK)
2.5-liter turbo models:
IFLR6B (NGK)HSB032BA