1. Exhaust Fumes: The manifold is responsible for collecting the exhaust gases from the engine and directing them to the exhaust system. If the manifold is not connected, these gases will escape into the atmosphere, creating an unpleasant odor and potentially harmful fumes.
2. Engine Performance: The exhaust system plays a crucial role in the efficient operation of the engine. It helps to regulate the flow of exhaust gases, which affects the engine's power, fuel economy, and overall performance. Without a properly connected manifold and exhaust system, the engine may not function optimally.
3. Increased Noise: The exhaust system also acts as a muffler, reducing the noise produced by the engine. Driving without the manifold connected will result in a much louder exhaust sound, which can be disruptive and annoying.
4. Legal Issues: In some jurisdictions, driving with a defective or disconnected exhaust system is illegal and may result in fines or penalties.
Therefore, it is advisable to ensure that the manifold is properly connected to the exhaust system before operating your vehicle. If the manifold is damaged or disconnected, it is recommended to have it repaired or replaced by a qualified mechanic as soon as possible.