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DIY Coolant Overflow Container



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Old 09-11-2013, 04:00 AM   #1
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DIY Coolant Overflow Container

I have seen similar things done, but nothing quite like the setup I built for my rig so I thought I would share. I wanted a nice overflow that was not plastic and would not leak water all over in steep up/downhills or off camber. I started with a stainless 1L water bottle that someone left in the gym and never claimed....then went to Ace Hardware and started piecing things together.

I found some adapters that go from hard copper compression fitting to 1/4" NPT to start with. I needed to seal them in the container and did not want to rely on epoxy or some kind of sealing goo. I found that a 1/2" grade 8 washer fit perfectly on the 1/4" pipe hex fitting shoulder. Next, I found a 1/4" pipe thread locking nut and a couple of 1/2" orings. Last thing was about 18" of 1/4" copper.

Then I just drilled a couple of holes in the water bottle, cut and bent the copper, and put it all together. The radiator side copper should be set around 1/8" off the bottom of the bottle, and the overflow copper can just run straight in the bottle.

When installed the upward pointing copper is the overflow and will loop back down toward the axle. I will test it in a couple weeks, but it should be sealed at any angle that will keep the tires on the ground.
Attached Images
File Type: jpeg catchcanparts.jpeg (108.5 KB, 70 views)
File Type: jpeg catchcanfitting.jpeg (99.9 KB, 70 views)
File Type: jpeg catchcancopper.jpeg (99.0 KB, 70 views)
File Type: jpeg catchcancomplete.jpeg (88.7 KB, 67 views)
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Old 09-11-2013, 07:18 AM   #2
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Can you hold enough fluid with just one? I did almost the same thing but with epoxy at the top, but I need to run two keep enough coolant in the system.
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Old 09-11-2013, 08:09 AM   #3
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Quote:
Originally Posted by Hiapo View Post
Can you hold enough fluid with just one? I did almost the same thing but with epoxy at the top, but I need to run two keep enough coolant in the system.
I really dont know for sure. I dont have anything now so I figure it will certainly be better with the extra. My engine is a 3.8 and radiator is 16x24 core so it is a smallish system.
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Old 09-11-2013, 08:41 AM   #4
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The lack of a reservoir may have contributed to your over heating issues. I've ran a powerade bottle for several years on mine, thinking about upgrading to a Monster soon though.
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Old 09-11-2013, 08:59 AM   #5
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Originally Posted by 90'K5 View Post
The lack of a reservoir may have contributed to your over heating issues. I've ran a powerade bottle for several years on mine, thinking about upgrading to a Monster soon though.
A monster would just put it way over the edge.
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Old 09-11-2013, 09:25 AM   #6
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got one of these for the x chassis
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Old 09-11-2013, 12:05 PM   #7
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Old 09-11-2013, 12:44 PM   #8
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I'm using a eBay oil catch can similar to this, but I'm using it for my hydro overflow. Using the stock overflow for my coolant

http://bit.ly/UXHZ14


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