Question about 2003 Nissan Altima

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The heater will not blow hot air unless you are giving it gas

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  • Nissan Master
  • 1,420 Answers

Welcome to FIxYa.com



This is a classic symptom of low coolant level or air in the system. Too, clogged heater core.

Buy a 5 min flush from your local dealer. With a gallon of Anti freeze and water pump lube. Flush the system per instructions on the back of the 5 min flush bottle. And add the one gallon of anti-freeze to system. The top off with water. Make sure engine is running with the heat selector on and fan on high.

See if the will work if not Change thermostat.



Thank you for using FixYa.com

Regards, Lee Davidian

Posted on Nov 09, 2010

  • Auto Repair Help
    Auto Repair Help Nov 09, 2010

    REFILLING ENGINE COOLANT





    1. Install the radiator drain plug. Install the reservoir
    tank and cylinder block drain plug,


    if removed for a total system drain or for engine removal or
    repair.


    A.
    The
    radiator must be completely empty of coolant and water.


    B. Apply sealant to
    the threads of the cylinder block drain plugs. Use Genuine High


    Performance Thread Sealant or equivalent.


    Radiator drain plug: 7.8- 11.8 Nm (0.8 - 1.2 kg-m, 69 - 104
    inch lbs.)


    Cylinder block drain plug: 34-44 Nm (3.5 - 4.5 kg-m, 25-33 ft.
    lbs.)


    2. If disconnected, reattach the upper radiator hose at the
    engine side.


    3. Set the vehicle heater controls to the full HOT and
    heater ON position. Turn the


    vehicle ignition ON with the engine OFF as necessary to
    activate the heater mode.


    Image


    4. Install the Tool by installing the radiator cap adapter
    onto the radiator neck opening.


    Then attach the gauge body assembly with the refill tube and
    the venturi assembly


    to the radiator cap adapter.


    5. Insert the refill hose into the coolant mixture container
    that is placed at floor level.


    Make sure the ball valve is in the dosed position.


    Use Genuine NISSAN Anti-Freeze Coolant or equivalent, mixed
    5œ50 with


    distilled water or demineralized water.


    Engine coolant capacity (without reservoir tank) 6.9 L (7 1/4
    Us qi)


    Reservoir tank: 0.7 L (3/4 US qt)


    6. Install an air hose to the venturi assembly, the air
    pressure must be within


    specification.


    Compressed air supply pressure: 5.7- 8.5 kPa (5.6 - 8.4
    kg/cm2, 80 - 120 psi)


    CAUTION: The compressed air supply must be equipped with an
    air dryer.


    7. The vacuum gauge will begin to rise and there will be an
    audible hissing noise.


    During this process open the ball valve on the refill hose
    slightly. Coolant will be


    visible rising in the refill hose. Once the refill hose is
    frill of coolant, close the ball


    valve. This will purge any air trapped in the refill hose.


    Image


    8. Continue to draw the vacuum until the gauge reaches 28
    inches of vacuum. The


    gauge may not reach 28 inches in high altitude locations,
    refer to the vacuum


    specifications based on the altitude above sea level.


    Altitude above sea level Vacuum gauge reading


    0- 100m (328 ft) : 28 inches of vacuum


    300 m(984ft) :27 inches of vacuum


    500m (1,641 fI) : 26 inches of vacuum


    1.000m (3.281 fI) : 24 -25 inches of vacuum






    Changing Engine Coolant


    WARNING:


    A To avoid being scalded; never change the coolant when the
    engine is hot


    A Wrap a thick cloth around cap and carefully remove the
    cap. First, turn the cap a


    quarter of a turn to release built-up pressure. Then push
    down and turn the cap all


    the way to remove.




    DRAINING ENGINE COOLANT



    1. Remove the engine undercover using power tool.




    2. Open the radiator drain plug at the bottom of the
    radiator, and remove the radiator


    filler cap. This is the only step required when partially
    draining the cooling system


    (radiator only).


    Do not to allow the coolant to contact the drive belts.


    3. Follow this step for heater core removal replacement
    only. Disconnect the upper


    heater hose at the engine side and apply moderate air
    pressure 1103.46 kPa (15 psi,


    1.055 kg/cm2) maximum air pressure] into the hose for 30
    seconds to blow the


    excess coolant out of the heater core.


    4. When draining all of the coolant in the system, remove
    the reservoir tank and drain


    the coolant, then clean the reservoir tank before
    installation.





    I hope this Helps you, Lee

    REFILLING ENGINE COOLANT



    1. Install the radiator drain plug. Install the reservoir tank and cylinder block drain plug,

    if removed for a total system drain or for engine removal or repair.

    A. The radiator must be completely empty of coolant and water.

    B. Apply sealant to the threads of the cylinder block drain plugs. Use Genuine High

    Performance Thread Sealant or equivalent.

    Radiator drain plug: 7.8- 11.8 Nm (0.8 - 1.2 kg-m, 69 - 104 inch lbs.)

    Cylinder block drain plug: 34-44 Nm (3.5 - 4.5 kg-m, 25-33 ft. lbs.)

    2. If disconnected, reattach the upper radiator hose at the engine side.

    3. Set the vehicle heater controls to the full HOT and heater ON position. Turn the

    vehicle ignition ON with the engine OFF as necessary to activate the heater mode.

    Image

    4. Install the Tool by installing the radiator cap adapter onto the radiator neck opening.

    Then attach the gauge body assembly with the refill tube and the venturi assembly

    to the radiator cap adapter.

    5. Insert the refill hose into the coolant mixture container that is placed at floor level.

    Make sure the ball valve is in the dosed position.

    Use Genuine NISSAN Anti-Freeze Coolant or equivalent, mixed 5œ50 with

    distilled water or demineralized water.

    Engine coolant capacity (without reservoir tank) 6.9 L (7 1/4 Us qi)

    Reservoir tank: 0.7 L (3/4 US qt)

    6. Install an air hose to the venturi assembly, the air pressure must be within

    specification.

    Compressed air supply pressure: 5.7- 8.5 kPa (5.6 - 8.4 kg/cm2, 80 - 120 psi)

    CAUTION: The compressed air supply must be equipped with an air dryer.

    7. The vacuum gauge will begin to rise and there will be an audible hissing noise.

    During this process open the ball valve on the refill hose slightly. Coolant will be

    visible rising in the refill hose. Once the refill hose is frill of coolant, close the ball

    valve. This will purge any air trapped in the refill hose.

    Image

    8. Continue to draw the vacuum until the gauge reaches 28 inches of vacuum. The

    gauge may not reach 28 inches in high altitude locations, refer to the vacuum

    specifications based on the altitude above sea level.

    Altitude above sea level Vacuum gauge reading

    0- 100m (328 ft) : 28 inches of vacuum

    300 m(984ft) :27 inches of vacuum

    500m (1,641 fI) : 26 inches of vacuum

    1.000m (3.281 fI) : 24 -25 inches of vacuum



    Changing Engine Coolant

    WARNING:

    A To avoid being scalded; never change the coolant when the engine is hot

    A Wrap a thick cloth around cap and carefully remove the cap. First, turn the cap a

    quarter of a turn to release built-up pressure. Then push down and turn the cap all

    the way to remove.


    DRAINING ENGINE COOLANT


    1. Remove the engine undercover using power tool.


    2. Open the radiator drain plug at the bottom of the radiator, and remove the radiator

    filler cap. This is the only step required when partially draining the cooling system

    (radiator only).

    Do not to allow the coolant to contact the drive belts.

    3. Follow this step for heater core removal replacement only. Disconnect the upper

    heater hose at the engine side and apply moderate air pressure 1103.46 kPa (15 psi,

    1.055 kg/cm2) maximum air pressure] into the hose for 30 seconds to blow the

    excess coolant out of the heater core.

    4. When draining all of the coolant in the system, remove the reservoir tank and drain

    the coolant, then clean the reservoir tank before installation.



    I hope this Helps you, Lee

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