Originally Posted by willg
On my boat, 2002 X-star (5.7L LTR engine) w/ factory heater, the valve is on the side of the block, between the spark plugs and under the manifold. It was really hard to get a good picture with the dividers in, I'll try to take a better one tomorrow. In the second picture, you can see the brass valve right in the center of the image between the exhaust. I have no idea where the water returns to the engine.
Thats where my valve is located. Do you think I would get hotter water if I pluged into the port by the thermostat.
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