MD6A cooling water circuit.. - SailNet Community

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Old 09-11-2008
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MD6A cooling water circuit..

Hello
Is there any information on how the external cooling water flows through the Volvo MD6A?

So far, I think I know this much...(correct me if I am wrong)

Water exits the water pump and goes to the Tee on the bottom aft end of the exhaust manifold. It pases through the Tee and on, through a rubber hose along the bottom of the manifold to the bottom of the thermostat cap. If the thermostat is closed, the water continues up to the top exit of the thermostat cap. It goes through another rubber hose and connects to the exaust pipe fitting and exits the boat.

If the thermostat is open, water enters the manifold and enters the engine block.
When it finishes in the engine it exits the block and comes back into the exhaust manifold.

THis is where I am not sure. Does it fall down through that previously mentioned Tee at the aft end of the manifold? If this is the case, some of the warm water could recirculate through the engine.

Thanks,
Roy
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