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Old 10-30-2014, 12:50 PM   #1
Scooby Newbie
Member#: 369421
Join Date: Sep 2013
Chapter/Region: MWSOC
Location: KY Capital
2009 WRX Sti

Default DIY coolant over flow tank

I am wanting to make my own coolant over flow tank. Just have a couple question for those that might have done this.
There is no pressure on this part of the system correct?
Would it be wise to run a second tube out in case say a t-stat sticks. Not wanting to have a bomb under the hood. Lol.
I plan on using an aluminum water bottle as my tank.
Any other info would be great or pics if you have your own set up.

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Old 10-30-2014, 10:51 PM   #2
Hoon Goon
Scooby Specialist
Member#: 335538
Join Date: Oct 2012
Chapter/Region: South East
Location: In Denial
2008 WRX - Hatch
WRB - Kornluvr


There is no pressure in the overflow,but you should make sure that the cap is vented some way or it will build pressure. No need to run a hose out or anything.
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Old 10-30-2014, 10:59 PM   #3
Medium Frank
Member#: 140114
Join Date: Feb 2007
Chapter/Region: MAIC
Location: Common Sense, VA
2014 Porsche
GT3 (Currently on Fire)


You can make these out of anything, they are unpressurized and simply catch excess fluid. People have made them from everything from a monster can to super overcomplicated aluminum boxes.
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