blueish white smoke from the exhaust is your piston rings leaking oil into the compression chamber...
rad. cap
Maybe : a crack in exhaust manifold that closes when hot.
Exhaust is overheating the starter, starter may be going bad or exhaust could be starting to plug up and getting to hot near manifolds
The cat convertors get quite hot. You might try installing another heat shield above it.
The back of the turbo, is the turbine. It has the hot exhaust gases flowing thru it. The exhaust gases are 1000+ degrees f. and cause the steel to glow red/yellow when under load.
You have to disconnect the battery for couple minutes.
On a dryer exhaust...yes. If you are talking about an exhaust on any kind of engine....NO> It will probably catch fire in a matter of minutes.
Is it plugged in correctly? Could also be overheating.
34 miles driving at 70mph requires 29.1 minutes.
30 minutes
MapQuest estimates the driving time as 3 hours and 28 minutes.
Could be a bad thermosat. The smoke could be from where you dripped oil onto the engine.