white smoke usually always head gasket or cylinder head problems no matter what the vehicle
Where is the leak coming from. Most likely you will need to replace the exhaust manifold gasket which will require removing the exhaust manifold.
If fumes are coming into a car it is most likely not going to be coming from a head gasket. The more likely places will be a blown exhaust gasket, exhaust doughnut, or some other type of exhaust leak.
Remove the muffler, the big bulge on the exhaust. Do note that this is likely to make the car illegal for road use.
Most likely your exhaust is rattling and the smell is because your catalytic converter is bad
most likely you have a leak in the exhaust pipes or a bad catalytic converter
this will more than likely hit you for $150 to $200
Most likely to be the number 1 injector. It has electrics bult in. Get the codes read first though.
It sounds like you either have a leak at the exhaust manifold or the intake manifold. Most likely is the exhaust.
check the catalytic converter. if the engine isisnt running hotter than normal it is most likely plugged exhaust somewhere likely in the catalytic converter
Likely an exhaust leak
The fumes are most likely coming from an exhaust leak. The leak could be at the converter, or somewhere else in the exhaust system.
most likely it has to do with your exhaust. If you have a problem anywhere from the exhaust manifold all the way to the tail pipe it can get pretty loud.