[56 nomad]

Hello,

sounds like not much to worry about if the shop will cover it...things i would check have been mentioned overfill on oil etc. are you using oil, how much any drips on the heat exchangers as you mentioned smelling the exhaust, when this happens are you noticing smoke from the tailpipe or just the smell of the burnt oil (thats why i mentioned checking for that drip).
could be just not broken in yet...in any case if the hop finds an issue and they will stand behind it no worries. if its not making strange noises i would drive it for awhile ( not revving the h@#$ out of it but "varying" the rpms and see what happens.
i always get a little smoke on start up does not worry me .
JM2C, ben