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Old 04-18-2010, 10:00 PM   #1
Scooby Newbie
Member#: 234772
Join Date: Jan 2010
Chapter/Region: RMIC
Location: Boise, ID
2003 Impreza WRX
Subaru blue

Default I'm a stupid noob with a stupid question...

Ok my radiator just blew and I replaced it with a new one I got from the dealership, here's my question. My old radiator didn't have the yellow cap that you're not supposed to remove when hot on the actual radiator but th new one does. Is there a problem with just capping off the overflow spiggot on the new radiator or what should I do?
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Old 04-18-2010, 10:03 PM   #2
Scooby Guru
Member#: 159334
Join Date: Sep 2007
Chapter/Region: MAIC
Location: Martinsburg, WV
02 WRX, 99RS,
AP3,PPG, BW S256


I had the same problem a couple days ago when I installed a new Mishimoto radiator. I made a second overflow out of a catchcan. You can either cap it off or run it to another overflow
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Old 04-18-2010, 10:49 PM   #3
Add Lightness
Member#: 13699
Join Date: Dec 2001
Chapter/Region: NESIC
Location: Hopkinton, MA

You can also run a Y connection on the overflow line and run both into the overflow tank. I actually use a 1 way valve Y connection on my Cobra kit car, which has a cap (16 pound) on the upper rad hose to have it as the highest point in the system, then the rad has a 22 pound cap. Vacuum line Y's and valves will work. The valve in my car is setup so that 22 Pound can't pull back into it.
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