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06-04-2022, 08:19 AM | #1 |
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Leakless Water pump
Hello friends. I’m going to swap the old water pump for a new leakless. I heard from a fella that after installing the new pump he couldn’t completely fill his radiator because it would spit out coolant of the radiator cap? Any insight on this?
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06-04-2022, 09:09 AM | #2 |
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Re: Leakless Water pump
Radiator will seek its own level, should be below the baffle or just slightly above! Put the pump on and drive! enjoy.
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06-04-2022, 09:13 AM | #3 |
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Re: Leakless Water pump
Agree with Gary.
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06-04-2022, 01:33 PM | #4 | |
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Re: Leakless Water pump
Quote:
I top off my radiator until it just shows above the baffle, but then after some driving it seems like it wants about a quart to a half gallon more to bring it back up. I can hear the coolant going down into the core (tubes) when I pour it back in. My preference would be to put in coolant until it just covers the tubes, and maintain it there, but I can't see the tubes because the baffle is in the way. I don't think it's leaking anywhere (head gasket is new) but I'd hate to run it dry inadvertently. I may try to capture the overflow from the tube and see if that's the volume that is lost, I'd feel better about fluid levels then. JayJay
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06-04-2022, 02:23 PM | #5 |
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Re: Leakless Water pump
Agree with above comments on the water seeking its own level.
I think you will really appreciate the leak less pump. Just for added info. The Model A’s main cooling system is done by Syphon as was the Model T. The pump was added to help when driving at higher speeds. The syphon will move 30 to 35 gpm. Enjoy your up grade. |
06-04-2022, 04:49 PM | #6 |
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Re: Leakless Water pump
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06-06-2022, 10:00 AM | #7 |
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Re: Leakless Water pump
Is it ok for “its own level” to be nearly a gallon below the radiator cap neck. Filled radiator to just below the cap neck and put on about 30 miles. Checked the next day before another excursion and added nearly a gallon of coolant. Would my A’s own coolant level be that low?
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06-06-2022, 10:27 AM | #8 | |
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Re: Leakless Water pump
Quote:
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06-06-2022, 12:37 PM | #9 | |
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Re: Leakless Water pump
Quote:
If not overheating, I would not worry. Enjoy. |
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06-07-2022, 09:09 PM | #10 | |
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Re: Leakless Water pump
Quote:
The pump can only move as much coolant as becomes available to it. If there is a restriction in the block, not so much is put out by the pump. Remember that for every drop of coolant that the pump pumps, a drop is removed from the radiator so it cannot overflow for that reason. Apart from expansion of the coolant, the only way the radiator can overflow is if it boils or there is a gas leak into it (like a blown head gasket) to increase its volume. I hope my literary skills are good enough to have explained that clearly enough.
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05-02-2024, 10:52 AM | #11 |
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Re: Leakless Water pump
I am preparing to change my radiator. As I read I notice that the vendors say the "impeller should be cut-down" to slow the flow rate and prevent overflowing. And, this is required for reproduction radiators.
So the level of fluid and the flow rate seam to matter as well as the baffle. Question I have is, if I change my radiator, should I change my impeller, too? My original water pump works well, has no issues, isn't leaking. |
05-02-2024, 12:34 PM | #12 | |
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Re: Leakless Water pump
Quote:
And as an aside, if you do choose to change your impeller, much easier to cough up a few extra bucks and buy the impeller already installed on the shaft rather than to change an impeller on an existing shaft. Check where the overflow tube is in your new radiator. I described an issue in my post #4 in this thread a couple of years ago. Turns out the opening to the overflow tube was way down in the upper tank. I grabbed it and pulled it up into the neck, problem solved.
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05-02-2024, 04:24 PM | #13 |
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Re: Leakless Water pump
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05-02-2024, 05:43 PM | #14 | |
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Re: Leakless Water pump
Quote:
An EASY test to see if the radiator is restricted is to start the engine and run it at road speed, then open the drain cock in the return tube. If no water comes out, the pressure is low and could even suck in air. If that happens, fix the cause of the problem and don't fuss about trying to fix the symptoms. REPLACE the radiator.
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