2016 Winnebago vista 27n it sat for a month but this has happened even after a few days. i start the engine and a puff of light blue smoke comes out of the tail pipe then goes away normal ? not from my experiences with lots of rigs especially new ones anybody have this issue .
Racking my brain to remember what the 'light blue' might mean but I seem to remember that I had to research it 10 years ago about my Fleetwood Bounder DP.
Turned out that it went away on it's own, I figured (guessed) it was the fuel, and the humidity at the time in the area where I was hanging out. Drove for another 10 years.
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'02 Winnebago Journey DL, DSDP, 36' of fun.
Normally valve seals, although I had that issue with my 08 Chev. It would only do it if I had parked on a slope with the front end up a little bit. Turned out I had a plugged up oil gallery in the cyl head that stopped the oil from running back down into the block and on start up the crankcase vent tube would suck oil into the intake manifold. I used seafoam in the crankcase and I've never had it since.
If you rev up the engine, then blue smoke only when you let off the gas petal - valve seal.
If it only does it at startup and it's a small amount, likely nothing to worry about.
In any case, I would get it checked and documented for warranty purposes.
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Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.
Smoke at startup
: 
Linear Mode
