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Hydro locking occurs when water or another incompressible fluid has been introduced into the engine combustion cylinder. This can cause very severe damage to the engine. It can bend connecting rods or in extreme case have a piston punch trough the side of the block.

One of the most common causes are cold air intake system, without a way to block the water due to the intake being lower and generally is exposed. Heavy rain or large puddle can go through the filter into the engine.

Another potential cause is head gasket issues, you can tell if this is the cause by checking the engine oil, if it's milky then it's because coolant leaked into the engine and got into the combustion cylinder.

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14y ago

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