If the vehicle is presently overheating, you want to check, and perhaps just replace, the cooling system thermostat (thermostats are not costly and they do eventually fail), check the radiator for blockages (radiators can be flow tested) and check the...
It sounds like what you are describing is an exhaust manifold leak. Your exhaust manifold is bolted to the cylinder head and is sealed with an exhaust manifold gasket that sits in between the manifold and the cylinder head. When...