i just installed a new exaust manifold on my truck. i have drove it for 2 days it has been doing fine no problems. on my way home last night i was smellind fumes entering my cab. i had to drive home with my windows all the way down. when i got home i checked for a manifold slash exaust leak but didnt see anything like that. i looked to see if i had any wires or anything melting but nothing. my truck tends to run hot like my gauge is always in between 3/4 and all the way hot. could it be that im burning oil and that was what i was breathing in? i checked my oil last night and it was a little low. it has been in the 90's here in boise idaho. any 1 have any ideas