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    Large Puff Of Blue Smoke at Start Up

    So the friend of mine who I had detailed her car as shown in a previous thread ( http://www.rennteam.com/showflat.php?Cat=0&Number=255783&an=0&page=2#255783 ) starts her car after it has sat for about eight hours, a large puff of blue smoke is emitted from the tail pipe. The car is a 2005 987 with about 10,000 miles on it now. She says she has never had to put oil and the gauge says the oil level is ok. Seems odd to have a large amount of blue smoke on start up and no oil usage.

    Any thoughts or ideas on what is going on?

    Re: Large Puff Of Blue Smoke at Start Up

    Perfectly normal - its a symptom of horizontal cylinder configurations.

    The piston rings may allow a small amount of oil past them into the bore when the engine is off, particularly if the split in the piston ring happens to be at the 6 o'clock position. On start up the very miniscule amoutn of oil that has seeped past is burnt off in the cylinder - i get this once a month (or every 100 or so starts).

    Its a bit embarrasing when the plume of smoke drifts across the neighbours garden though

     
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