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Old 05-11-2010, 13:01   #1
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True of False ? (Engine Overheating)

True or false, if you leave the cap off of your expansion tank, the engine will overheat. This is on a Volvo 2003 diesel.

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Old 05-11-2010, 13:20   #2
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I'll say false, the pressure cap prevents evaporation, but the engine typically runs below the boiling point of coolant (that the cap raises more by adding pressure).
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Old 05-11-2010, 13:23   #3
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False...a typical expansion tank is at atmospheric pressure...i.e. its vented.
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Old 05-11-2010, 13:27   #4
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Quote:
Originally Posted by James S View Post
False...a typical expansion tank is at atmospheric pressure...i.e. its vented.

Damm......trick question
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Old 05-11-2010, 13:40   #5
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Totally false, although it will probably cause some of the coolant to overflow since it would normally go into the expansion tank. But this has nothing to do with overheating. Chuck
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Old 05-11-2010, 19:42   #6
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False, unless the expansion tank has been placed lower than the exchanger. Which would be an installation error.

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