» » »

Mercedes-Benz Q&A

Ask Your Question

2007 Mercedes-Benz SLK280 Question: I started the engine and a big puff of blue smoke appeared. It only happened once.



Visitor, Tucson, AZ, February 22, 2011, 17:18

what would cause a big puff of blue smoke when starting the engine after sitting over night, it only happened once.!!

1 Answer
Flag This
  • Answer #1

    February 22, 2011, 19:55

    Usually this is a sign of the failed valve stem seals. Some oil sweeps through the seals and burns in the combustion chamber at the next start.


    Flag This