If the exhaust manifold on a vehicle is rusty, what should be done?

If the exhaust manifold is rusty, taking no action might seem like a viable choice, but it's generally not advisable. Rust on an exhaust manifold can lead to several issues, including weakening of the metal, which can result in cracks or leaks over time.

The rust can also hinder the efficient operation of the exhaust system, leading to reduced performance and increased emissions. Leaving rust unattended could mean that, eventually, more extensive repairs or replacements will be needed.

Proper maintenance often involves some form of treatment or action to protect the manifold from further deterioration. Options such as painting, polishing, or sandblasting can be employed to remove or mitigate existing rust and protect against future corrosion.

Maintaining the integrity of the exhaust manifold is key to ensuring the overall health of the vehicle’s exhaust system and preventing costly repairs down the line.