Heat Exchanger Volvo Penta Aq131d

[JoeyGallo]

Hello, can anyone tell me about the heat exchanger on a Volvo penta Aq131d? Are there any moving parts inside or just a resivoir for the coolant and water? Do they go bad?

 

[boatdoc55]

No moving parts. The raw water circulates around the sweet water and transfers the heat away. Just consider it a radiator only water instead of air. It's an aluminum housing with a brass insert. I'm not sure on the 131 but on the older 125-145 the rubber o-ring in the bottom of the exchanger could go bad and the two coolants would mix and flow out the exhaust.

 

[RicardoMarine]

Joey, here's an exploded view of what should be your AQ131D heat exchanger.

As Kim says, it functions similarily to that of a car/truck radiator, but with seawater replacing the air as the heat removal media.


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