Incline could have made some coolant leak out of the expansion tank, and dripped onto the exhaust manifold, as it heated up it evaporates and turns to white smoke. Was it out of the exhaust or under the hood? Just a thought...better hope it wasn't the HG!

__________________
TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth