Coolant Overflow Bottle
 

What is the best factory appearing radiator overflow bottle anyone has come up with? I figure there must be some GM car or truck that used one that fits well and looks right in a '67-'72.

Re: Coolant Overflow Bottle
 

I use this washer bottle and bracket. I simply run a 5/16" or 1/4" hose from the radiator filler neck barb to the bottle. Use a 16 PSI Lever lock radiator cap and your radiator stays full and drip free. Bottle should be about half full when the engine is up to temp. https://www.lmctruck.com/1967-72-che...per-and-washer The bracket, bottle and cap, and enough hose to plumb it. LMC has the bottles backordered but Classic Parts has them. One of the venders here will surely have these as well... https://www.classicparts.com/Misc-Wi.../products/294/

Re: Coolant Overflow Bottle
 

I have one for a late '70s Nova.[?] It's an OER part. Got it from Jeg's. Kind of a teardrop shape, but it tucks perfectly inside the passenger/side fender, next to the battery box.
Sorry I can't recall P/Ns, and my pix are trapped on my old computer.
The only drawback was that I had to pull the battery carrier to mount it. It's suspended by a single bolt thru the pass/side fender, just aft of the fusible link terminal. Most of the weight is borne by the inside fender skirt.

Re: Coolant Overflow Bottle
 

On my '71 4x4 I used a factory mount bracket and W/S washer bottle like is found on the driver's side and mounted it to the passenger side just aft of the battery. Use a 16 lb. closed system cap with the safety release lever and some clear vinyl tubing. Keep it at about 1/3 full when cool, works well and looks as if it is a factory install.

Re: Coolant Overflow Bottle
 

Re: Coolant Overflow Bottle
 

I used the washer bottle and bracket as well. It looks like it belongs there. I used an S-10 washer bottle with a pump for the windshield washer.

Re: Coolant Overflow Bottle
 

This is a $11 Dorman "coolant recovery" tank (read it is like a modern closed system vs "overflow")

I used a spacer to match the offset from core support on one of the 2 attachment screws. The hole for the hose from radiator is already in the core support. Coolant recovery tanks require a "closed system" cap. You fill radiator completely up vs leaving them 3" low for coolant expansion. As coolant heats up it expands into the "recovery" tank and when the motor cools, it is drawn back into radiator. The hose from radiator goes into the bottom of the tank vs the top of a "overflow" only tank so it can be drawn back into radiator, like a modern cooling system.

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

The tank noted that would fit inside PS fender is for a 75 Nova ($45 on Summit). I have one in my 67 Camaro. My 72 C10 has the vapor canister in that area so I elected to go Dorman route on the truck

Re: Coolant Overflow Bottle
 

The hose on an overflow tank goes to within 1/2" of the bottom of the tank. It works the same way. Manufacturers have built them like that for years. Modern cooling systems on most vehicles incorporate the tank into the cooling system (it's under pressure), so there is technically no recovery tank.

Re: Coolant Overflow Bottle
 

Thanks! I will look into the Nova bottle. Saw on the web some use a G body bottle, it's curved on the bottom and fits on the right inner fender too.

Re: Coolant Overflow Bottle
 

This is the 75 Nova tank I put in my 67 Camaro. It should also work on a C10 unless you still have EVAP canister installed

Re: Coolant Overflow Bottle
 

I bought another windshield washer tank for a '72 right off the parts board here. I mounted it on the core support same as in post #6. Works great, and looks like it was meant to be there.

Re: Coolant Overflow Bottle
 

What are the dimensions? I have some A/C hard lines in that area.

Never mind, I found them. But is it really 4.25" wide (front to back)?

Re: Coolant Overflow Bottle
 

Some impressive and functional mounting ideas here.
The tucked away Nova one in particular.
I used an aftermarket windshield washer tank.
Works well.

Re: Coolant Overflow Bottle
 

I've seen these at swap meets, going to get one. Opticlean glass bottle.

Re: Coolant Overflow Bottle
 

Is this the one you're talking about?

https://www.oerparts.com/product/all...ts/551448.html

Re: Coolant Overflow Bottle
 

I can pull up my own pix now. New computers take a while to get used to.

But, Yeah, that's it. Looks like they went up another $5 in price. But I got mine from Jegs.

I had the Nova puke tank installed on my '68 C/10 Stepside, but the 292 runs so cool, I didn't need it, so I moved it over to my '71 GMC Jimmy K/1500 w/ a 350. Still working out the bugs.
The Radiator shop repaired my 4 core copper/brass radiator OK, but they ignored my instruction to clock the filler neck relief outlet to the rear at 6'o'clock.

Re: Coolant Overflow Bottle
 

Thanks for the picture - I was wondering how it fits in there. I'm definitely going that route now!

Re: Coolant Overflow Bottle
 

Kind of a PIA, that you have to pull the Battery, then the Batt Box, to get it in there, but once you're past the surgery, it fits like it was meant to be there.
My old Batt Box was corroded thru, so I had to replace it anyway.

Re: Coolant Overflow Bottle
 

A member used a '90's GM van tank

http://67-72chevytrucks.com/vboard/a...1&d=1291582329

The 1972 OEM tank:



http://67-72chevytrucks.com/vboard/a...1&d=1506464386

http://67-72chevytrucks.com/vboard/a...1&d=1437589425

http://67-72chevytrucks.com/vboard/a...1&d=1437589425

http://67-72chevytrucks.com/vboard/a...1&d=1349727065

http://67-72chevytrucks.com/vboard/a...1&d=1349857667

http://67-72chevytrucks.com/vboard/a...1&d=1350755531

http://67-72chevytrucks.com/vboard/a...1&d=1350755531

http://67-72chevytrucks.com/vboard/a...1&d=1350755531

Re: Coolant Overflow Bottle
 

I have electrical stuff mounted in two of those areas, and A/C hard lines in another, but you all have given me some ideas.http://67-72chevytrucks.com/vboard/i...ons/icon14.gif

Re: Coolant Overflow Bottle
 

I have sold the truck but yes, the dimensions are what listing notes. One good thing about Amazon is easy returns

If you see my pic I used a spacer to absorb the gap for the PS hold down screw to core support.

Re: Coolant Overflow Bottle
 

Mine.

Re: Coolant Overflow Bottle
 

my set up on '72 C10 with 350 from the Atlanta plant

Re: Coolant Overflow Bottle
 

Someone needs to repop that 994230 kit!