LS Tech: Vacuum Filling the Cooling System! 

Good video explanation. Hints: draw air into hose from bucket first. 2) before adding extra coolant to bucket turn off valve so you do not get air into line which could add an air lock

Just pulled coolant through one of my cars after an 'air lock' situation attempting to simply refill by pouring in the coolant. This tool was a total game changer and I was equally surprised at the fill speed. Got me back on the road. You do.need.to watch the level due to heater core/thermostat side but easy enough to top up.

Good idea to have the heater on full heat to open the core for a full vacuum/fill. If you mentioned it, I missed it. Nice video.

Can't wait to hear the first start cheers.

Based off this video I bought the Harbor Freight Maddox cooling system test and refill kit $80. I was able to get it down to -20 psi and following the directions. Filled the system with no issues. I also had air in my system and no other procedures worked.

Nice video,I bought a Blue Point one years ago but never used it.I will give it a try on my 71 C10 LS3 swap.

Great Video and explanation. I gotta get that tool. Cant wait to hear it start.

was looking at these on amazon and delray auto parts used your thumbnail on their vacuum bleeder refill kit

How would you burp the system if you didn’t have this tool and doing a complete refill?

Great video - after the first fill, couldn’t you just top it off without having to pull more vacuum? At that point I would think all the areas you’d be concerned about would be full

Is this also a way to remove all the bubbles from the system to where it is safe to run a throttle body and radiator steam pipe line delete? So many opinions on deleting the rad and tb lines

I was a little confused about the need to re-vacuum the system. Does this pull a lot of coolant back out? Are we just creating a vacuum in the reservoir at that point, or does it get trapped air out from other places?

My air supply is lubricated so do I have to worry about the in-line lubricator getting oil into the system?

Can this be used to bleed the system if you already have coolant in the car, I just drained all my old coolant and refilled it with new and I want to make sure there is no air in the system

I've got a whole case of Water Wetter, shit is legit!

Do I need to buy an attachment for the air compressor ?

Please help...Just did my 07 f150 4.6. Replaced the water pump and t stat. Removed the t stat and upper rad hose. Ran garden hose in the degas till water ran clear out the top rad hose. Did same for heater core and rad. Pressurized system, held 16psi. Drained rad, hooked up coolant vacuum, vacuum held but was slowly coming down. (Figured it might be not a tight seal). Only sucked up 1 gallon of 50/50 and now resivoir is to the cold fill line. Haven't started the engine yet because I'm replacing power steering lines and haven't put the fun clutch and shroud back on to give me more room for the ps lines. Why would it not take the full amount approximately 2.5 gallons??

Does this work when coolant is already in the system?

Do you think those little portable air compressor will work?

How does this work when thermostat is closed.?

I see one outstanding problem with this setup. The design and idea is good, BUT it seems to me that when you drop the tubing into the bucket of coolant and open the valve to fill the system, the air that was in the tubing has nowhere to go and goes into the engine, which is what you were trying to prevent in the first place. There needs to be a way to remove the air from the tubing, OR fill the tubing with coolant. Perhaps a small bleeder valve installed where the tubing goes into the device would do the trick.