True of False ? (Engine Overheating)

[witzgall]

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

Chris

[Sailmonkey]

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).

[James S]

False...a typical expansion tank is at atmospheric pressure...i.e. its vented.

[Sailmonkey]

Originally Posted by James S

False...a typical expansion tank is at atmospheric pressure...i.e. its vented.

Damm......trick question

[AnchorageGuy]

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

[barnakiel]

False, unless the expansion tank has been placed lower than the exchanger. Which would be an installation error.

b.