Blue smoke sometimes when I start my 2004 Boxster

Hi Gert, If the smoke is more visible during the period after start up in the mornings, I would suspect the valve stem oil seals have become hardened and defective. The oil seeps in slowly passing the seals from the cylinder head. Sounds as though you need a head job. Regards John

Apr 29, 2012 • 2005 Ford Focus 2.0

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blue smoke on startup is generally from worn valve guides or bad stem seals on same (not really terrible as long as it stays the same) It will run rough for a minute 'till the oil in the cylinders is cleared out. Service engine light is pretty much on its own timer and does not mean anything but it's there to annoy you into going to the dealer. If O2 sensor was bad, it would eventually put the red check engine light on.

May 30, 2009 • 2000 Buick LeSabre

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Te blue smoke is oil getting into the piston/fire chamber..

If it is only at start-up - it is more than likely the valve seals.. Allot of the time they use plastic ones so therefor it is somewhat common for cars to do this..
If it is not to bad and stops soon after start-up,, its not really a big deal..

IF it is allot - and smokes all the time - it could be that the valve seals need to be replaced OR could be the piston rimgs are shot..

Please dont forget to rate well ;o)

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Blue smoke sometimes when I start my 2004 Boxster

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