Question about 2002 Nissan Sentra

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WHITE SMOKE OUT OF EHAUST - 2002 Nissan Sentra

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White smoke is caused by engine coolant / antifreeze being processed in the combustion chamber(s) of the engine

Keep in mind that, on a cold day you may see what appears to be white smoke from the exhaust that will disappear after the vehicles engine has warmed up to it's normal operating temp.. This is a normal reaction called condensation... condensation is the result of a small amount of water/dew being drawn into the exhaust usually collecting in the muffler and/or the catalytic converter.

Hope helps.

Posted on Mar 20, 2011

  • ZJ Limited
    ZJ Limited Mar 20, 2011

    The first thing I would look for would be is your radiator low on
    coolant? If so, I would get a cooling system pressure test to determine
    if there is an internal coolant leak in your engine. Blown head gaskets
    are the first thing that comes to mind here and this pressure test
    should reveal this to you.

    If you do find you have a blown head gasket or some other internal coolant leak I would recommend you try this over
    the counter product first before you spend any big bucks overhauling
    the engine.

    If the pressure test determines the coolant is not leaking, then you
    might want to see if your transmission is equipped with a vacuum
    transmission modulator valve on the side of the transmission.


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White smoke from the exhaust, usually indicates cylinder head problems on a petrol vehicle or water in the fuel filter on a diesel vehicle, water is getting into the exhaust via the combustion process causing steam, hence the white smoke.
If the vehicle is petrol, check your coolant level, you will find it to be low, be very careful when removing the top as there will be a pressure build up in the cooling system, waite until the cooling system has cooled down.
Please leave feed back.

Posted on Mar 20, 2011


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