Bleeding Cooling Loop With a Vacuum Pump

SlipoftheKnife · 07-29-2009, 01:33 PM

Here is a VERY crude drawing but you guys get the picture. Has anyone ever used a hand vacuum pump (usually used for bleeding brakes) to bleed their cooling loop? If you have all your lines hooked up and at the fill port line attach the vacuum and pull vac on the system it work right? The drain line would have a valve at the end that's closed and once vac is pulled on the loop have the valve attached or submerged in the coolant then open it, it should fill air free, correct?

jaydee · 07-29-2009, 09:24 PM

Only thing I can see as an issue is the water may go right through the rez and right to the hand pump bypassing the rest of the loop... Follow the path of least resistance theory..

ben333 · 07-29-2009, 10:51 PM

If you have a good setup with your res or tline at the top there is no need for a vacuum. I've been sick of bleeding my cooling systems also so I see where this idea is coming from but like JD said it probably wouldn't work well (water going into the vacuum pump).

HammerSandwich · 07-30-2009, 11:47 AM

You could get the same results more easily with a little extra tubing & gravity. This assumes your loop's not installed on the ISS...

SlipoftheKnife · 07-30-2009, 12:52 PM

I see what you're saying. Just for the record too. The picture is not showing it, but the hand pump would be the highest point in the loop so everything else would be below it

07-29-2009, 09:24 PM	#2
jaydee Put up or Shut Up Join Date: Dec 2001 Location: Spokane WA Posts: 6,506	Re: Bleeding Cooling Loop With a Vacuum Pump Only thing I can see as an issue is the water may go right through the rez and right to the hand pump bypassing the rest of the loop... Follow the path of least resistance theory..

07-29-2009, 10:51 PM	#3
ben333 Uber Pro/Mods Join Date: Aug 2007 Location: New Hampshire (USA) Posts: Two hundred somethin Posts: 432	Re: Bleeding Cooling Loop With a Vacuum Pump If you have a good setup with your res or tline at the top there is no need for a vacuum. I've been sick of bleeding my cooling systems also so I see where this idea is coming from but like JD said it probably wouldn't work well (water going into the vacuum pump). __________________ Pro Slacker

07-30-2009, 12:52 PM	#5
SlipoftheKnife Cooling Neophyte Join Date: Feb 2008 Location: Bridgewater, MA Posts: 16	Re: Bleeding Cooling Loop With a Vacuum Pump I see what you're saying. Just for the record too. The picture is not showing it, but the hand pump would be the highest point in the loop so everything else would be below it

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