2008 Toyota Sienna CEFACTORY OEM SERVICE PROCEDURE

General Maintenance

HINT:

Inspect these items when the engine is cold.

  1. INSPECT DRIVE BELT 

    HINT:

    (See INSPECTION )

  2. REPLACE SPARK PLUGS 

    HINT:

    (See REMOVAL )

  3. INSPECT AIR FILTER 
    1. Remove the air filter.
    2. Visually check that the air filter is not excessively damaged or oily.

      HINT:

      Oiliness may indicate that the PCV valve is stuck.

      If necessary, replace the air filter.

    3. Clean the filter with compressed air.

      First blow from the inside thoroughly and then blow from the outside of the filter.

      Fig 1: Cleaning Filter With Compressed Air
      G05139912Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Reinstall the air filter.
  4. REPLACE AIR FILTER 
    1. Replace the air filter with a new one.
  5. REPLACE ENGINE OIL AND OIL FILTER 

    HINT:

    (See REPLACEMENT )

  6. REPLACE ENGINE COOLANT AND INSPECT RADIATOR FIN 

    HINT:

    (See REPLACEMENT )

    1. Check that the radiator and condenser are not blocked with leaves, dirt or insets.

      Clean them if necessary, and check the hose connection for the installation condition, corrosion etc.

  7. INSPECT GASKET IN FUEL TANK CAP 

    HINT:

    (See INSPECTION )

  8. INSPECT FUEL LINES AND CONNECTIONS, FUEL TANK VAPOR VENT SYSTEM HOSES AND FUEL TANK BANDS 
    1. Visually check the fuel lines for cracks, leakage, loose connections, deformation or tank band looseness.
  9. INSPECT EXHAUST PIPES AND MOUNTINGS 
    1. Visually check the pipes, hangers and connections for severe corrosion, leaks or damage.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.