Moisture trap on diesel engines - Mercedes-Benz Forum

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post #1 of 4 (permalink) Old 05-28-2009, 04:00 PM Thread Starter
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Moisture trap on diesel engines

On a previous post there was a question about having a moisture trap on turbocharged diesel engines.
Some diesel engines that are turbocharged have a small drain valve usually located near the after-cooler. In theory there is condensation from the air that is compressed by the turbo. The thought is that humidity in the air will condense when compressed.
This is typical in high HP marine diesel engines. These are engines that will burn more that one gallon of diesel per minute.
Normally when the engine is turned off and the air pressure in the turbo is equalized with the outside air the water will automatically drain off from this valve.
Not sure if any of the MB diesels have this feature.
My opinion is that this valve system is not required or is anything to worry about.
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post #2 of 4 (permalink) Old 05-28-2009, 05:22 PM
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Never have seen it.
How often you take your Mercedes on the water?
This guy might need it.

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post #3 of 4 (permalink) Old 05-29-2009, 09:57 AM
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Yes, plenty of heat left over to dissipate the moisture.

Extrapolating marine experience to auto experience seems of little value.

Kent Christensen
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post #4 of 4 (permalink) Old 05-29-2009, 11:19 AM
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Thanks for the further info guys.

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