72 K10 LQ4 swap overflow bottle question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

suburban99 · 07-13-2017, 12:06 PM

Now that I have been driving my 72 for a couple of days I noticed antifreeze coming out of the overflow tube of the stock rad after I park it for a few minutes. Truck runs at 196f per my scanner...do I need an overflow bottle? Truck didn't have one when I bought it. What are you guys using? Pictures if possible thanks!

t300 · 07-13-2017, 12:12 PM

For what its worth, I don't have one on my lq4. have stock fan clutch (no shroud) and it sits at 90c / 194f solid according to my Dakota Digital gauges. Overflow hose puked a bit after the first coolant fill and running but hasn't in the 3000km or so since.

ls1nova71 · 07-13-2017, 05:50 PM

You dont need an overflow bottle, but without one you cant fill the radiator all the way to the top. This is the reason original radiators have the full level a few inches doen from the top, there needs to be room for expansion when the coolant is warm. If you over fill it, it will just puke out the excess then when it gets to the level it can safely hold it will stop, this will be the full level.

**Hart_Rod** · 07-15-2017, 09:53 AM

Quote:

Originally Posted by suburban99

Now that I have been driving my 72 for a couple of days I noticed antifreeze coming out of the overflow tube of the stock rad after I park it for a few minutes. Truck runs at 196f per my scanner...do I need an overflow bottle? Truck didn't have one when I bought it. What are you guys using? Pictures if possible thanks!

I just converted my wiper washer reservoir to my radiator overflow.

ls1nova71 · 07-15-2017, 11:51 AM

Quote:

Originally Posted by Hart_Rod

I just converted my wiper washer reservoir to my radiator overflow.

Just don't take it to a Jiffy Lube type place or it'll likely get topped off with washer fluid!

Andy4639 · 07-17-2017, 03:48 PM

I have always ran a over flow tank on all 3 engines. It's just a good idea.

Where I work they have security guards that check the parking lot regularly. If they see the same vehicle puking anti freeze everyday they will put a sticker on it. After several times they will not let you on site with the vehicle until it's fixed.

07-13-2017, 12:06 PM	#1
suburban99 Registered User Join Date: May 2014 Location: Mission BC Posts: 452	72 K10 LQ4 swap overflow bottle question Now that I have been driving my 72 for a couple of days I noticed antifreeze coming out of the overflow tube of the stock rad after I park it for a few minutes. Truck runs at 196f per my scanner...do I need an overflow bottle? Truck didn't have one when I bought it. What are you guys using? Pictures if possible thanks! __________________ 1962 C10 Longbox LS 5.3 4L60E----Sold$$ 2014 Ram 4x4 3500 Laramie Diesel..Momma's truck 2015 Ram 4x4 1500 1997 Boxster. 1972 K10 Custom Deluxe LS 6.0 1950 GMC 3100 S10 & LS swapped

07-13-2017, 12:12 PM	#2
t300 Registered User Join Date: Mar 2013 Location: Manitoba Posts: 184	Re: 72 K10 LQ4 swap overflow bottle question For what its worth, I don't have one on my lq4. have stock fan clutch (no shroud) and it sits at 90c / 194f solid according to my Dakota Digital gauges. Overflow hose puked a bit after the first coolant fill and running but hasn't in the 3000km or so since.

07-13-2017, 05:50 PM	#3
ls1nova71 Registered User Join Date: Dec 2009 Location: Independence Mo Posts: 4,118	Re: 72 K10 LQ4 swap overflow bottle question You dont need an overflow bottle, but without one you cant fill the radiator all the way to the top. This is the reason original radiators have the full level a few inches doen from the top, there needs to be room for expansion when the coolant is warm. If you over fill it, it will just puke out the excess then when it gets to the level it can safely hold it will stop, this will be the full level. __________________ 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

07-17-2017, 03:48 PM	#6
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,936	Re: 72 K10 LQ4 swap overflow bottle question I have always ran a over flow tank on all 3 engines. It's just a good idea. Where I work they have security guards that check the parking lot regularly. If they see the same vehicle puking anti freeze everyday they will put a sticker on it. After several times they will not let you on site with the vehicle until it's fixed. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.



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