Does washing your engine damage it?
For example, wires, sensors, and other sensitive engine components can be exposed to water if you choose to wash your engine on your own. In this instance, the components could start to malfunction due to water damage, leading to costly engine part replacements or repairs. Is it OK to hose down your car engine? For instance, even if you're not the most knowledgable person with car engines, you shouldn't hold your water hose or pressure washer directly to the engine 5 inches away.