Water pump vent screw - K-Bikes.com - Excellence in Motion
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post #1 of 4 (permalink) Old Nov 4th, 2009, 3:49 am Thread Starter
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Water pump vent screw

The vent screw on the water pump. It's like a bleed nipple.
Part 10 here...
Does it need bleeding when refilling the radiator?
It's a pretty high point in the system... could you be patient and fill the system from there and not have to use a vac pump?
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post #2 of 4 (permalink) Old Nov 4th, 2009, 1:27 pm
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The bleed screw isn't that high up compaired to the radiator cap (the highest point in the system). You will need a vac system to do it correctly and purge all of the air out of the system.


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post #3 of 4 (permalink) Old Nov 4th, 2009, 1:46 pm
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Yeah, I don't think you could do the job properly without a vacuum fill tool. Or at least it would take a lot of time and fiddling, vs. just a few minutes with the tool.
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post #4 of 4 (permalink) Old Nov 5th, 2009, 5:25 am Thread Starter
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I think I'll probably make a vac tool. I have a design in my head using a rubber bung, a hand operated vac pump I have, and some small bore plumbing taps I have in my bits box.
I was just wondering about the bleed screw as an option.
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