There is probably a fuel leak somewhere. You should have a professional check it out ASAP. There is a possibility of a fire if left alone.
You cracked your head.
Bad heater core.
The 2005 Cavalier could have a fuel leak. Have the entire fuel system checked, as a fuel leak can cause a dangerous fire.
Clear or blackish water coming from exhaust is very common and is nothing more than condensation from the metal heating up. If you have white smoke with a sweet smell then you may have an issue, but I think your fine and just seeing condensation.
That is a good possibility.It also could be running lean and causing it to smell that way.If it starts running poorly or wont accelerate then you will have to replace it. Need 2 find out why IT's running Rich.
yes, they use their noses
if its a rotten egg smell its probably the cat if its loud volume look for a blown gasket or a hole in the pipes
If its slipping you will smell it. If it shutters you probably have grease spots on your fly wheel. Grinding noise may mean you need a new pilot bearing(throughout bearing).
There are many different kinds of smells that could be coming from the brakes. There could be a burning smell.
They go in dirt and leaves that's where the smell is coming from
When you start to notice dirt in their coat, or they smell.
First of all, check the condition of the tank if it is good then chech gaskets and hoses for the fuel pump.