How High Water Level Will Cause Engine Water Intrusion?
2 Answers
Generally, it's around 20cm, while for SUVs with higher ground clearance, it's typically 30cm. Below are methods to check if the engine has water intrusion: 1. Check the engine oil: The simplest method is to inspect the color of the engine oil for any abnormalities. If the oil turns milky white, it indicates water has entered the fuel tank or engine. 2. Inspect all pipelines for water intrusion: Examine the air filter and the lower housing of the air filter for obvious signs of water intrusion, and check the intake pipe and intake manifold for noticeable water traces. 3. Check the spark plugs: Remove the spark plugs from each cylinder and check if they are damp. If they are, it suggests signs of water intrusion in the engine.
I've been driving for decades, and the water level that's high enough to flood the engine is usually around 30 to 50 centimeters, roughly submerging half of the wheel hub. The air intake of a sedan is located under the hood, and water levels reaching this point can easily allow water to be sucked into the engine, causing it to stall instantly or even suffer internal damage. I remember one time during a flood when a car forced its way through deep water, resulting in the engine being flooded and totaled, costing over ten thousand to repair. So when encountering flooded areas, I always use a stick to measure the water depth or observe how vehicles ahead are passing through. If the water level is unclear, I'd rather detour or stop and wait. Different vehicle models have varying wading capabilities; SUVs can handle higher levels but still aren't safe. Regularly checking the vehicle's air intake system can reduce the risk.
