If you notice any of the following signs, it's likely that your exhaust manifold is leaking:
1. You hear a loud, continuous rattling noise coming from the engine area. This is caused by exhaust gases escaping from the manifold and hitting the underside of the hood.
2. Your vehicle smells like gasoline or oil. This is because leaked exhaust gases are being drawn into the cabin through the ventilation system.
3. Your engine is running hotter than normal. This is because leaked exhaust gases are disrupting the airflow around the engine, causing it to overheat.
4. You see flames or sparks coming from under the hood. This is caused by hot exhaust gases igniting as they escape from the manifold.