I have a 1980 Westy and on my recently completed trip across Canada, I
noticed that the 'exhaust' smell that fills the interior seems to be
coming from the hot air vents that blow against the windshield and side
windows.  We blocked these vents off with books and the smell seemed to
go away.  Any ideas?  I'm new to this whole being a mechanic thing but
would the heat exchanger maybe have anything to do with this?

\/\/i!!y

1980 Westy "Jazzy"

(Just got back into Hamilton from Vancouver - 4500kms later (3000mi))