Yes a little can if your Donut which connects your engine to your exhaust pipe is broken, cracked , it is locate under where your feet set in the center under neath your car. Had a problem with mine doesn't smell to good ...
Check inside the car undre the dash , check the heater core.
Exhaust fumes can enter the cab from a faulty exhaust system through any opening that leads into the cab, such as a hole from a rotted floor panel, trunk floor, inner fender, etc. Engine oil leaks under the hood can also drip down onto a hot exhaust system, causing smelly smoke that can enter the cab through the fresh air intake.
This is not a good idea, as chimney fumes could come the other way. It would be illegal under most municipal building codes.
Your exhaust may be leaking slightly at the front. The fumes can easily end up in the car this way. Exhaust gasses are poisonous so you should get it looked at as soon as you can. Another cause could be that a breather pipe has come of the engine or air box.
High pressure coolant is blowing out through a small hole in your heater core, it will need to be repaired or replaced. If it is warm out it might be AC refrigerant leaking.
Vehicle exhaust fumes. Fuel emissions. Coal burning factories. Mass burning of forests and vegetation.
When a head gasket blows, it most often causes a lose of coolant either in the exhaust or the oil. When the coolant drops, there is not enough to circulate through the heater core. The engine may over heat but no heat will come out of the heater because there is no coolant in it.
Condensation forms in the exhaust system while it is cooling and as gas fumes pass through the system it bound to smell that way. If large amounts of water come out of the exhaust it may be a sign that there is a blown head gasket, cracked head or block causing water from the cooling system to enter the cylinders.
it does not come with a block heater unless installed by a mechanic. if so, it will be in the engine block under the exhaust manifold. can see it from under the van
The heater blower may not be working properly. Without the heater blower working, the air will not come through the vents.
You can bleed the cooling system from the heater lines at the firewall. Before you start the engine, loosen one of the heater lines, then replace it without the clamp. Start the engine and when it reach's operating temp. slowly open that heater hose slightly. Coolant and air will then come out. Be careful of the fumes because the coolant will drop on the exhaust. Make sure the heater inside the car is on max. Bleed the system till all the air is out and you get hot air inside. Refill the rad.
I have the same problem in my 2000 grand am! Have had it in the shop three times and they can not find the problem either. Exhaust system is tight, replced manifold gasket, still fumes. seems to be worse when cold is cold, after stopping from a drive, can smell on drivers side under the hood??? Help!