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Old 10-08-2023, 04:19 PM
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Default Is it posible.....

Winterizing the boat and went to drain the headers and hardly anything comes out, we were on Table rock about two weeks a go so I figured they would be full as usual... is it possible that a four hour pull home could of sucked all the water out ? there is no way it all could of evaporated in that short of time.
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Old 10-08-2023, 05:28 PM
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You have any O rings for the butterfly valves missing? I now i bought some aftermarkets ones a while back and they dripped all the time.
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Old 10-08-2023, 06:41 PM
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I would think not, what type of headers are they? I know I have pulled mine home 3 hours and left it sit for a couple of weeks and still had quite a bit of water in them. Are all 4 the same or did some have more than others?
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Old 10-09-2023, 06:33 AM
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Last season when I drained my stellings I didn’t get much at all and all four were about the same. When I took the tails off spring more water came out than what I had drained. This year I’m going to put air into the dumps after draining. Not sure if it was the angle or what but didn’t appear to.
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Old 10-09-2023, 07:55 AM
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My CMIs use the rubber distribution tubes and I have drain valves worked into the connection. I’ve seen them leaking some. A couple times I’ve forgotten to open the valves after flushing and found them and my heat exchangers empty. It doesn’t take much of a leak at all to drain them.
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Old 10-09-2023, 08:05 AM
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Water leaking back through the pump/impeller? I have pretty much always noticed that over an extended period, water leaks back through the pump and out the drive to height equal to the drive inlet level.
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Old 10-09-2023, 08:31 AM
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Headers are CMI sweepers with the welded distribution connections, O rings are fine and plugs were tight, strainers are still full so I guess it could leaking back but it would have to go up to the T stat housing to drain, kinda perplexing.
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Old 10-09-2023, 08:34 AM
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Suction could pull it through the thermostat housing. Siphon effect?
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Old 10-09-2023, 08:38 AM
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Possible Tom.........not running a thermo stat wide open with a cross over, there was no more than a trickle out of three of them and a few table spoons from one
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Old 10-09-2023, 11:38 AM
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Header leak test time brother. Better safe than extremely sorry.
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