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07-25-2012, 10:46 AM
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#1 |
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Registered User
Join Date: Mar 2010
Location: Downtown
Posts: 573
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Radiator overflow
Hey guys,
I'm plumbing my coolant setup on my ls1 swap, and was wondering what everybody is doing for a overflow setup? I'm using my stock radiator, can I just run the overflow hose to a overflow tank? thanks Posted via Mobile Device |
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07-25-2012, 11:10 AM
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#2 |
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Registered User
Join Date: Oct 2009
Location: Prescott, Arizona
Posts: 2,396
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Re: Radiator overflow
Yep, you can put anything in there you wish.
I just left my overflow hose open on my LS swap as that's how GM built the truck anyway. |
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07-25-2012, 11:13 AM
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#3 |
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Registered User
Join Date: Mar 2010
Location: Downtown
Posts: 573
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Re: Radiator overflow
okay. that sounds great. thanks
i may just leave mine open also, any issues at all with this setup? Posted via Mobile Device |
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07-25-2012, 11:27 AM
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#4 |
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Registered User
Join Date: Oct 2009
Location: Prescott, Arizona
Posts: 2,396
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Re: Radiator overflow
No issues for the overflow, millions of cars made that way.
Environmentalists may not like though  If you fill the radiator to the very top,,, It will drip (usually after you shut it down) and basically level itself off to a point where it stops doing it. And you are good to go.An overflow however isn't a bad idea and having a closed cooling system can have some advantages. There are many aftermarket and factory style tanks that should fit your taste. A neat way to do the 67-72 trucks (and I've been thinking about doing it myself) is to take another washer bottle and bracket that is used for the washer/wiper system and mount one on the other fender (passenger side) for an overflow. You just have to change the cap to a dual nipple design. One for the radiator hose and the other is your drain or vent. Doing it this way on a 67-72 truck makes it appear like it's a factory setup... |
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07-25-2012, 11:35 AM
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#5 |
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Registered User
Join Date: Mar 2010
Location: Downtown
Posts: 573
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Re: Radiator overflow
awesome.
thanks so much for the help Posted via Mobile Device |
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07-25-2012, 01:49 PM
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#6 |
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Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,118
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Re: Radiator overflow
If you run an open system, whatever you do, don't put Dexcool in it. When it mixes with air it turns to mud. Personally I never use it though, its crap in my book.
Posted via Mobile Device
__________________
My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html |
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07-25-2012, 04:23 PM
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#7 |
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meowMEOWmeowMEOW
Join Date: Sep 2009
Location: MKE WI
Posts: 7,128
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Re: Radiator overflow
^this. Dexcool was a bad try at an environmentally friendly coolant....great until it turns to algea in your tank.
Get the green regular, or the Pink Universal....or you can be gangster like me and just run water and water wetter.
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'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING  |
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07-26-2012, 08:46 AM
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#8 |
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Registered User
Join Date: Sep 2005
Location: sc
Posts: 1,203
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Re: Radiator overflow
I have my overflow into a old brake fluid bottle...stays empty!
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71 Cheyenne C10 LWB cam'd 6.0/T56 Swap |
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07-26-2012, 09:53 AM
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#9 |
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Always a work in progress
Join Date: Jun 2007
Location: Harker Heights, TX
Posts: 1,599
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Re: Radiator overflow
I used to use and old crown royal bottle with a hole in the lid!!
__________________
USMC Retired Never trust a man who can't laugh at his own fart! 2010 Silverado Crew Cab 73 SWB 5.3/4l80e Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=695168 |
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07-26-2012, 12:20 PM
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#10 | |
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Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,118
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Re: Radiator overflow
Quote:
Posted via Mobile Device
__________________
My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html |
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07-26-2012, 04:30 PM
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#11 |
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Registered User
Join Date: Mar 2005
Location: 10-Uh-See
Posts: 5,609
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Re: Radiator overflow
I've always just ran my overflow through the inner fender. When I teched in for the GG autocross, they told me I had to have a catch can, so I sucked down a Mtn Dew as fast as I could, then used a mini-bungee cord to tie the can to the bumber bracket under the fender.
He said as long as it didn't fall off, it would be fine. It stayed on there, too. I'm thinking of having a custom one made to fit under the inner fender, so it's out of the way, but more than likely mount one under the battery tray.
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07-27-2012, 04:03 PM
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#12 |
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Registered User
Join Date: Nov 2001
Location: Springfield, MO
Posts: 2,928
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Re: Radiator overflow
If you are ever going to take it to a race track they will insist you have an overflow tank.
__________________
Dave 1968 Custom Chevy with turbo charged 5.3 gen III 4l80e swap 1967-71 GMC 3/4 ton long step 4x4 (not sure what year exactly?) "A good friend will bail you out of jail...but a true friend will be sitting next to you saying "that was frekin awesome". "If it doesn't fit force it...If it breaks then it needed to be replaced anyway!" |
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07-27-2012, 05:01 PM
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#13 |
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Registered User
Join Date: Mar 2010
Location: Downtown
Posts: 573
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Re: Radiator overflow
no track duty here. thanks for the replies guys
always learning something new Posted via Mobile Device |
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