2003 SUBARU BAJA Service

Maintenance and service11-11
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12. Reinstall the cover under the oil filter.
13. Pour engine oil through the filler neck.
Oil capacity (Guideline): 4.2 US qt (4.0 liters, 3.5 Imp qt)
The oil quantity indicated above is only a guideline. The necessary quantity of oil depends on the quantity of oil that has been drained.
The quantity of drained oil differs slightly depending on the tempera-
ture of the oil and the time the oil is left flowing out. After refilling the
engine with oil, therefore, you must use the dipstick to confirm that the
level is correct.
14. Start the engine and make sure that no oil leaks appear aroundthe filter ’s rubber seal and drain plug.
15. Run the engine until it reaches the normal operating temperature.
Then stop the engine and wait a few minutes to allow the oil drain
back. Check the oil level again and if necessary, add more engine oil. Recommended grade and viscosity CAUTION
Use only engine oil with the recommended grade and viscosity.
Oil grade: ILSAC GF-3, which can be identified with the new API certification mark (Starburst mark)
or API classification SL with the words “ENERGY CON-
SERVING” (if you cannot obtain the oil with SL grade,
you may use SJ grade “ENERGY CONSERVING ” oil).
These recommended oil grades can be identified by looking for either
or both of the following marks displayed on the oil container.

Maintenance and service11-13
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Recommended grade and viscosity under severe driving conditions
If the vehicle is used in desert areas, in areas with very high tempera-
tures, or used for heavy-duty applications such as towing a trailer, use
of oil with the following grade and viscosities is recommended.
API classification SL (or SJ): SAE viscosity No.: 30, 40, 10W-50,
20W-40, 20W-50
Cooling system
WARNING
Never attempt to remove the radiator cap until the engine has
been shut off and has cooled down completely. Since the coolantis under pressure, you may suffer serious burns from a spray ofboiling hot coolant when the cap is removed.
CAUTION
The cooling system has been filled at the factory with a high
quality, corrosion-inhibiting, year-around coolant which providesprotection 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 improp-er coolants may result in corrosion in the cooling system. It is im-portant to maintain protection against freezing and corrosion,even if freezing temperatures are not expected. Never mix differ-ent kinds of coolant. Do not splash the engine coolant over painted parts. The alco-
hol contained in the engine coolant may damage the paint sur-face.
Hose and connections
Your vehicle employs an electric cooling fan which is thermostatically

Maintenance and service11-15
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Rubber gaskets
3. After refilling the reserve tank and the radiator, reinstall the caps
and check that the rubber gaskets inside the radiator cap are in the
proper position. Changing the coolant
WARNING
Never attempt to remove the radiator cap until the engine has
been shut off and has cooled down completely. Since the coolantis under pressure, you may suffer serious burns from a spray ofboiling hot coolant when the cap is removed.
Change the engine coolant using the following procedures according
to the maintenance schedule in the “Warranty and Maintenance Book-
let”. 1. Remove the under cover.
2. Place a proper container under the drain plug and loosen the drainplug.

Maintenance and service11-17
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Rubber gaskets
5. Put the radiator cap back on and tighten firmly. At this time, make
sure that the rubber gasket in the radiator cap is correctly in place.
6. Start and run the engine for more than five minutes at 2,000 to
3,000 rpm.
7. Stop the engine and wait until the coolant cools down (122 to140 °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.
8. Put the radiator cap and reservoir cap back on and tighten firmly.
Air cleaner element
WARNING
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.
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 unnecessary to clean or wash the element.

Maintenance and service11-19
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Spark plugs
CAUTION
When disconnecting the spark plug cables, always grasp the
spark plug cap, not the cables. Make sure the cables are replaced in the correct order.
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It may be difficult to replace the spark plugs. It is recommended 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 Maintenance Booklet ”.
Recommended spark plugs
RC10YC4 (Champion)BKR6E-11 (NGK)BKR5E-11 (NGK)

Maintenance and service11-21
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Manual transmission oil
Checking the oil level
Check the oil level monthly.
1. Park the vehicle on a level surface and stop the engine.
OM-H0210
Upper level Lower level
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2. Pull out the dipstick, wipe it clean, and insert it again.
3. Pull out the dipstick again and check the oil level on it. If it is below
the lower level, add oil through the dipstick hole to bring the level upto the upper level. Recommended grade and viscosity
Each oil manufacturer has its own base oils and additives. Never use
different brands together.
Oil grade: API classification GL-5

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4. Pull out the dipstick and check the fluid level on the gauge. If it is below the lower level on the “HOT” range, add the recommended au-
tomatic transmission fluid up to the upper level. n Checking the fluid level when the fluid is cold
When the fluid level has to be checked without time to warm up the
automatic transmission, check to see that the fluid level is betweenthe lower level and upper level on the “COLD” range. If it is below that
range, add fluid up to the upper level. Be careful not to overfill. Recommended fluid
“ Dexron III ” Type Automatic Transmission Fluid

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SAE viscosity No. and Applicable Temperature
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Rear differential gear oil
Checking the gear oil level CAUTION
If the vehicle requires frequent refilling, there may be an oil leak. If you suspect a problem, have the vehicle checked at your
SUBARU dealer.
Your vehicle may be equipped with a rear differential protector. The
differential protector provides protection to the rear differential assem-
bly during off-road use. Removal of the rear differential protector is not
required when checking the oil level.