Smoke from 2008 Cayenne S

[ArtS]

Hello and thank you for your suggestions in advance.

We have a 2008 Cayenne S, from new. Recently moved, went to new dealer for first time to winterize car and had fuel pump changed as part of "service initiative". Ever since the exhaust output has been white and excessive. Dealer keeps trying to say it is condensation, but relative to other cayennes of same generation/model we have about 3x the exhaust. It is worse after car heats up/driving longer distances.

They did replace a coolant rail on top of engine block that "also sometimes breaks" when coolant light was on and levels low. I'm worried about head gasket/major component failing and want to get it sorted out while under warranty. Oil dipstick does not look "milky". Dealer keeps trying to say not to worry as no check engine light comes on, if there was really coolant getting through the gaskets it would be picked up there.

Any thoughts?

[R2 Racing]

If you are burning coolant it would have a distinct coolant smell. The colors of smoke are as follows, black rich fuel mixture, blue/gray oil in exhaust, white is usually water such as condensation. It should stop once car is at warmer temps. These cars do blow white exhaust while warming up in cold weather.

[ArtS]

I don't smell coolant. It actually is worse at acceleration, no matter when during driving. So much exhaust it occludes view of car behind when starting from stop.