sounds like a blown gasket, allowing coolant to enter the cylinders.
Head gasket
If what you are decribing is smoke coming from underhood that smells like burnt oil, it may be your valve cover gasket(s) leaking on the hot exhaust manifold. This smell is strong enough to come into the passenger compartment while you drive. It should be repaired. I hope this helps you. Mark
The fumes are the burnt exhaust gasses.
found out it was the oil pressure switch dripping down on to exhaust pipe collecting on heat shield, thanx anyway
You may have oil on the exhaust, once this has burnt off the smoke should stop.
plant or bush that smells like burnt toast
A ballast that smells burnt is going bad. The ballast will have to be replaced to fix the problem.
Dog food ;)
if you have blue smoke coming into the exhaust that means your piston rings are bad and are letting oil into your combustion chamber and then causing the oil to be burned with your air fuel mixture and that's why your exhaust is blue from having that burnt oil dumped out of the exhaust valve and out the exhaust
A burnt leaf.
Power steering fluid smells burnt, sometimes I add fluid, cause its down
Exhaust coming out of the airfilter indicates a possibility of a few things. Motor has jumped time. Burnt Intake Valve It can also be that the valve lash is out of adjustment.