Question about 2001 Nissan Sentra

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Blue smoke on a 2001 nissan sentra

Has 70,000 km. Air flow meter changed. timing chain replaced.Blue smoke from exhaust now & then only when motor is warmed up, specialy when turning left. Could it be the head gasket. Check engine soon light not on.

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  • f_morency Jun 22, 2009

    Yes it is automatic. Why is the check engine soon light dos not come on. worn valve seals at 70,000km?

  • Ned C Cook
    Ned C Cook May 11, 2010

    blue smoke? is this an automatic?

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  • Nissan Master
  • 3,433 Answers

Ok, Check the vacuum line at the transmission modylator. Pull the line off and if ther is oil in it, the engine is sucking up and burning your trans fluid. Replace the modulator. Let me know and good luck If its bad its a 10 minute fix.

Posted on Jun 22, 2009

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  • Master
  • 750 Answers

Blue smoke indicates exsesivs oil in cylinders,may have worn valve seals or leaking piston rings, is there any lost in engine power?

Posted on Jun 22, 2009

  • steve noel Jul 16, 2009

    if car is left idling for long times, say running a/c while parked for hours you whould have glazing of the cylinder walls causing rings not to seal properly so excessive oil then leacks past them making

    blue smoke when combustion takes place

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