Can over-fuelling cause overheating

Yes, over-fuelling can cause overheating in an engine. When too much fuel is injected into the combustion chamber, it can lead to incomplete combustion, resulting in unburned fuel that raises exhaust temperatures. This excess fuel can also wash away lubricating oil from cylinder walls, increasing friction and heat. Consequently, the engine may struggle to dissipate heat effectively, leading to overheating issues.