overflow - The 1947 - Present Chevrolet & GMC Truck Message Board Network

76bonanza · 11-17-2005, 11:06 AM

On my 68 there is no overflow container for the radiator just the pipe so if I fill it to full it pukes fluid all over the place. Looks like there is no spot for an overflow either. Any ideas pics or help would be most helpfull.

jsbgump · 11-17-2005, 11:11 AM

I have seen where someone used a washer fluid bottle for an overflow and it looked original. I was thinking about using an original washer fluid bottle and bracket and just mounting one one the passenger side of the core support or even on the passengr side fender.

shelby987 · 11-17-2005, 11:13 AM

I went to advanced autoparts and bought a generic overflow bottle....I mounted the bracket to the fender right behind the battery and right above the inner fender....I then ran the tube from the radiator along the grille line with the electrical wires, and into the bottom of the bottle....the mount the original black tubing to the top of the bottle, and out to some area where it can easily flow out of the engine compartment without puddling....the top is pretty cheesy and doesn't look all that great, but I mounted it without putting any new holes in the truck....and its relatively hidden.....I can post pics later if someone else doesn't (I think it cost like $8....for me it was worth it).

76bonanza · 11-17-2005, 11:53 AM

I would like some pics so it flows into bottom of bottle then if bottle fills flows out top and away? I was wondering if there was any room under the battery tray for anything.

brownk · 11-17-2005, 01:07 PM

When I got my truck it emptied into an old rad fluid bottle as well. I have been thinking of finding some sort of billet crome bottle or canister of some kind and mounting it near the rad.

Kurtis

72 longhorn BB · 11-17-2005, 01:34 PM

If you do not have the dual battery setup, you can put it here:

This is someones 67-72 with a 73 bottle I think.

Mine is the same bottle but located on the passenger fender:

I am still looking for a replacement bracket, as mine got lost.

Any help would be appreciated.

76bonanza · 11-17-2005, 02:00 PM

Does the overflow hose mount to the bottom of the bottle? Also did our trucks not come with one stock?

72 longhorn BB · 11-17-2005, 03:17 PM

Yse, mine has a connection for the hose on teh bottom of the tank. Otherwise, I think the overflow hose just routed to teh bottom of the frame for dumping on the ground.

shifty · 11-17-2005, 03:35 PM

Quote:

Originally Posted by 76bonanza

Does the overflow hose mount to the bottom of the bottle? Also did our trucks not come with one stock?

Mine didn't

shelby987 · 11-17-2005, 03:46 PM

yes, the line runs to the bottom of the bottle.....this allows the system to syphon fluid from the bottom when under vaccum, and push fluid into the overflow bottle when under pressure (hot).
I often wonder if having the bottle improves your cooling ability.....if only a little, because it ensures more of a closed system, allowing for a better pressurized system (raises boiling point), and it also allows for the greatest amount of fluid to be in the system at all times.....rather than the system going to equilibrium based off of how much fluid was dumped during the last boil over

jhow66 · 11-17-2005, 03:52 PM

You must also have a special rad. cap so that it will pull coolant back to rad. when it cools.

**53burb** · 11-17-2005, 06:13 PM

If you are not into originality, I used a overflow bottle mounted on the passenger side inner fenderwell, right behind the battery. There was a link to this, but I do not have it anymore. This wasn't my idea. Someone else might have it. It was from a mid-eighties Monte Carlo. It fit perfectly in that spot. I got it off E-bay for a total of 10 bucks delivered. Sorry I don't have a digital camera for pics, but believe me, it fit really good.

Striker169 · 11-17-2005, 06:22 PM

I just used another washer bottle and mounted it to the passenger fender, I'll try to get some pics of it tomorrow

**truckdude239** · 11-17-2005, 08:44 PM

mine didn't it leaks all over the roads some times and people like your truck is leaking u better get that fixed

LUV2XCLR8 · 11-17-2005, 08:54 PM

Quote:

Originally Posted by jhow66

You must also have a special rad. cap so that it will pull coolant back to rad. when it cools.

Did not know that one, thanks for the tip

**truckdude239** · 11-17-2005, 09:01 PM

yeah got to have an more monder cap

llegos · 11-17-2005, 09:32 PM

Quote:

Originally Posted by brownk

When I got my truck it emptied into an old rad fluid bottle as well. I have been thinking of finding some sort of billet crome bottle or canister of some kind and mounting it near the rad.

Kurtis

kinda pricey, but that kind of stuff does exist. http://www.jegs.com/webapp/wcs/store...0127&langId=-1

blood62 · 11-17-2005, 09:37 PM

beer can and duct tape

68Stepbed · 11-17-2005, 09:43 PM

Here's what I have. Me likey.

purposeful and purdy

76bonanza · 11-17-2005, 09:56 PM

68stepped does it run in the bottom of tank also does it have a drain? does the hose run under the raditor to other side?

71-longbed · 11-17-2005, 11:27 PM

i converted my windsheild wiper fluid container into a radiator overflow ....

just ran a long tube from the overflow nipple down the bottom of the shroud and over to the bottle ... removed the mesh filter and .. it works great

Longhorn Man · 11-17-2005, 11:55 PM

These trucks didn't have this stock, nothing did back then...at least, they were just becomeing known in this era.
There is nothing wrong with going without. You aren't supposed to fill the rad to the top, an inch or so below the top iss all you need. Fill it up and let it puke, that is where you want the level.
The added cooling ability... if any... will not be noticed.

76bonanza · 11-18-2005, 12:15 AM

True longhorn maybe I will add a hose to the pipe so it will not puke all over my engine bay next time.

71RestoRod · 11-18-2005, 02:14 AM

Longhorn's right... you don't need it, but I felt compelled to rig one anyway.

I think 53Burb is also correct that they used this style overflow bottle cap in the mid 80s Monte Carlos. The washer and overflow bottles shown here are the same. If you can find the overflow cap anywhere (GM part#340194, discontinued) you can make your own. Notice that the drain tube is larger than the overflow tube from the radiator. I think this is so when the rad burps the cap doesn't blow off the overflow bottle.

Frank (PICKMUP) was the first I saw putting these together but he ran out of the caps before I could order one from him. I picked up this set of washer and overflow bottles from Wes. They came complete with mounting brackets, caps and hoses.

72 longhorn BB · 11-18-2005, 07:47 AM

I like it!
So you used a coolant overflow cap on a washer fluid bottle, right?

What car did the coolant overflow cap come off of?

11-17-2005, 11:06 AM	#1
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	overflow On my 68 there is no overflow container for the radiator just the pipe so if I fill it to full it pukes fluid all over the place. Looks like there is no spot for an overflow either. Any ideas pics or help would be most helpfull. __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

11-17-2005, 11:11 AM	#2
jsbgump Gone Fishing Join Date: Aug 2005 Location: Fort Worth, Texas 76135 Posts: 12,361	Re: overflow I have seen where someone used a washer fluid bottle for an overflow and it looked original. I was thinking about using an original washer fluid bottle and bracket and just mounting one one the passenger side of the core support or even on the passengr side fender. __________________ 68 Chevy Short Fleetside LSX Swap Under Way 3.73 posi 2.5/4 drop Frame of resto has been started 2022 Hyundai Tucson Limited 2019 Chevy Traverse Redline Edition Wifes Ride Build Thread http://67-72chevytrucks.com/vboard/s...=1#post3483616

11-17-2005, 11:53 AM	#4
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	Re: overflow I would like some pics so it flows into bottom of bottle then if bottle fills flows out top and away? I was wondering if there was any room under the battery tray for anything. __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

11-17-2005, 01:07 PM	#5
brownk Registered User Join Date: Nov 2005 Location: Canada Posts: 20	Re: overflow When I got my truck it emptied into an old rad fluid bottle as well. I have been thinking of finding some sort of billet crome bottle or canister of some kind and mounting it near the rad. Kurtis __________________ 72 Chev Custom Fleetside 2wd, 350 mild performance rebuilt crete .20 over, flat top KB pistons, stock crank, 74cc heads, Edelbrock cam, HEI, 1987 rebuilt R4 700, 20" Eagle rims with cooper 275 45 20's, and a whole lot of body work left to do. My Grandpa bought the truck new and it has worked hard for 33 years. It will now be starting its new life as a street machine and show truck.

11-17-2005, 01:34 PM	#6
72 longhorn BB Registered User Join Date: Jan 2000 Location: Michigan Posts: 312	Re: overflow If you do not have the dual battery setup, you can put it here: This is someones 67-72 with a 73 bottle I think. Mine is the same bottle but located on the passenger fender: I am still looking for a replacement bracket, as mine got lost. Any help would be appreciated. __________________ Chuck 1972 C-20 Longhorn 402 BB .030" over (409?), curved HEI, RV cam, quadrajet, dual 3" exhaust, TH 400 ported w/shift kit 1999 K1500 Suburban (old style) 5.7L Vortec 4L60E "No matter where you go, ........ there you are"

11-17-2005, 11:13 AM	#3
shelby987 Registered User Join Date: Mar 2005 Location: Just outside Durham, NC Posts: 894	Re: overflow I went to advanced autoparts and bought a generic overflow bottle....I mounted the bracket to the fender right behind the battery and right above the inner fender....I then ran the tube from the radiator along the grille line with the electrical wires, and into the bottom of the bottle....the mount the original black tubing to the top of the bottle, and out to some area where it can easily flow out of the engine compartment without puddling....the top is pretty cheesy and doesn't look all that great, but I mounted it without putting any new holes in the truck....and its relatively hidden.....I can post pics later if someone else doesn't (I think it cost like $8....for me it was worth it).

11-17-2005, 02:00 PM	#7
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	Re: overflow Does the overflow hose mount to the bottom of the bottle? Also did our trucks not come with one stock? __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

11-17-2005, 03:17 PM	#8
72 longhorn BB Registered User Join Date: Jan 2000 Location: Michigan Posts: 312	Re: overflow Yse, mine has a connection for the hose on teh bottom of the tank. Otherwise, I think the overflow hose just routed to teh bottom of the frame for dumping on the ground. __________________ Chuck 1972 C-20 Longhorn 402 BB .030" over (409?), curved HEI, RV cam, quadrajet, dual 3" exhaust, TH 400 ported w/shift kit 1999 K1500 Suburban (old style) 5.7L Vortec 4L60E "No matter where you go, ........ there you are"

11-17-2005, 03:46 PM	#10
shelby987 Registered User Join Date: Mar 2005 Location: Just outside Durham, NC Posts: 894	Re: overflow yes, the line runs to the bottom of the bottle.....this allows the system to syphon fluid from the bottom when under vaccum, and push fluid into the overflow bottle when under pressure (hot). I often wonder if having the bottle improves your cooling ability.....if only a little, because it ensures more of a closed system, allowing for a better pressurized system (raises boiling point), and it also allows for the greatest amount of fluid to be in the system at all times.....rather than the system going to equilibrium based off of how much fluid was dumped during the last boil over

11-17-2005, 03:52 PM	#11
jhow66 Registered User Join Date: Jun 2002 Location: Knoxville Tenn. Posts: 3,058	Re: overflow You must also have a special rad. cap so that it will pull coolant back to rad. when it cools. __________________ 56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer

11-17-2005, 06:13 PM	#12
53burb Registered User Join Date: May 2004 Location: Queen Creek, AZ Posts: 1,004	Re: overflow If you are not into originality, I used a overflow bottle mounted on the passenger side inner fenderwell, right behind the battery. There was a link to this, but I do not have it anymore. This wasn't my idea. Someone else might have it. It was from a mid-eighties Monte Carlo. It fit perfectly in that spot. I got it off E-bay for a total of 10 bucks delivered. Sorry I don't have a digital camera for pics, but believe me, it fit really good.

11-17-2005, 06:22 PM	#13
Striker169 Car O'Holic Join Date: Jan 2005 Location: Austin, Tx. Posts: 692	Re: overflow I just used another washer bottle and mounted it to the passenger fender, I'll try to get some pics of it tomorrow

11-17-2005, 08:44 PM	#14
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,233	Re: overflow mine didn't it leaks all over the roads some times and people like your truck is leaking u better get that fixed __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

11-17-2005, 09:01 PM	#16
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,233	Re: overflow yeah got to have an more monder cap __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

11-17-2005, 09:37 PM	#18
blood62 Registered User Join Date: Oct 2004 Location: cape cod mass Posts: 65	Re: overflow beer can and duct tape



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11-17-2005, 09:43 PM	#19
68Stepbed Registered User Join Date: Mar 2005 Location: 10-Uh-See Posts: 5,609	Re: overflow Here's what I have. Me likey. purposeful and purdy __________________ Matt 68 C10 stepside, LS1/700R4, TCI Engineering suspension system Last edited by 68Stepbed; 10-04-2007 at 10:31 PM.

11-17-2005, 09:56 PM	#20
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	Re: overflow 68stepped does it run in the bottom of tank also does it have a drain? does the hose run under the raditor to other side? __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

11-17-2005, 11:27 PM	#21
71-longbed Its Magically Delicious Join Date: Jan 2003 Location: oregon Posts: 2,398	Re: overflow i converted my windsheild wiper fluid container into a radiator overflow .... just ran a long tube from the overflow nipple down the bottom of the shroud and over to the bottle ... removed the mesh filter and .. it works great __________________ 71 C10 LWB 350sbc -TH350 12 bolt 3.42 Posi Of all my favorite things to do, The utmost is to have a brew. My love grows for my foamy friend, with each thirst-quenching elbow bend. Beer so frosty, smooth, and cold it's paradise pure liquid gold. Yes beer means many things to me that's all for now cus I gotta pee.

11-17-2005, 11:55 PM	#22
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: overflow These trucks didn't have this stock, nothing did back then...at least, they were just becomeing known in this era. There is nothing wrong with going without. You aren't supposed to fill the rad to the top, an inch or so below the top iss all you need. Fill it up and let it puke, that is where you want the level. The added cooling ability... if any... will not be noticed.

11-18-2005, 12:15 AM	#23
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	Re: overflow True longhorn maybe I will add a hose to the pipe so it will not puke all over my engine bay next time. __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

11-18-2005, 02:14 AM	#24
71RestoRod Registered User Join Date: Sep 2003 Location: Evergreen, CO Posts: 494	Re: overflow Longhorn's right... you don't need it, but I felt compelled to rig one anyway. I think 53Burb is also correct that they used this style overflow bottle cap in the mid 80s Monte Carlos. The washer and overflow bottles shown here are the same. If you can find the overflow cap anywhere (GM part#340194, discontinued) you can make your own. Notice that the drain tube is larger than the overflow tube from the radiator. I think this is so when the rad burps the cap doesn't blow off the overflow bottle. Frank (PICKMUP) was the first I saw putting these together but he ran out of the caps before I could order one from him. I picked up this set of washer and overflow bottles from Wes. They came complete with mounting brackets, caps and hoses. Attached Images __________________ 71 Blazer / GMPP ZZ383 / MPFI / 700R4 / 4-Wheel Disk / Ground-up frame off almost completed resto-mod Last edited by 71RestoRod; 11-18-2005 at 10:22 AM.

11-18-2005, 07:47 AM	#25
72 longhorn BB Registered User Join Date: Jan 2000 Location: Michigan Posts: 312	Re: overflow I like it! So you used a coolant overflow cap on a washer fluid bottle, right? What car did the coolant overflow cap come off of? __________________ Chuck 1972 C-20 Longhorn 402 BB .030" over (409?), curved HEI, RV cam, quadrajet, dual 3" exhaust, TH 400 ported w/shift kit 1999 K1500 Suburban (old style) 5.7L Vortec 4L60E "No matter where you go, ........ there you are"

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