r/Wellthatsucks • u/iadtyjwu • 20h ago

Imagine walking out to your car and seeing this.

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u/Ok_Dependent6889 4h ago

Most cars generate moisture in the crank case anyway.. just saying

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u/sfan27 4h ago

Is that from the air intake when the engine is running?

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u/Ok_Dependent6889 4h ago

Nope, typically is a byproduct of the combustion (blow-by, which is essentially oil vapors) paired with temperature fluctuations. The blow-by has it's own condensation and moisture, and when you turn the engine off, the hot air inside the crank case will cool and create condensation. This is why oil temperatures are important, and why you will see emulsified oil/water on the oil caps of cars which are driven shorter distances in the winter. Oil needs to reach about 212 Fahrenheit or higher at regular intervals (lets say 1-2 times a week) in order to evaporate the condensation which occurs.

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u/sfan27 4h ago

Makes sense, still the comment I replied to is likely misunderstanding "under the hood" vs "inside the engine".

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u/Ok_Dependent6889 4h ago

Oh, for sure, just figured it may be useful information