Was this a factory option or back woods invention

[Air Hog]

Is this a good indication that the radiator is not stock, owner said motor was a transplant, 302in a 68 U15

 

[Scoop]

That tank is stock for 67-68 V8's I believe. The bungee cord however is aftermarket!

 

[Viperwolf1]

The duraspark module was added later.

 

[HoosierDaddy]

Not sure what engine the would go with , but they did have them at some point.

The 68 trail beater I bought has one.

 

[BicksBronc]

it looks like a vacuum cleaner. what is it supposed to do?

 

[Air Hog]

tank

This is how you fill the radiator there is no cap were the cap should be on the radiator, kinda thought this wasnt the right setup, it org had a 289 would it have been on the 289 ??? or it could be a homemade still, havent found the copper coil yet

 

[Air Hog]

pic

another pic

 

[Zillacon]

I had one on my 66. Here is a link to Toms on one. Hope this helps.

http://www.tomsbroncoparts.com/product.php?category=24&id=596

 

[krisbassett]

my 67 had one also. It finally developed a split and I had the radiator shop put a filler neck on my radiator......much better!!

 

[MarsChariot]

Expansion tank. Early models.

 

[barronj]

From the bungee, the exposed air filter element, and a few other things, I bet you're cursing that PO regularly..

 

[helifreek]

My 68 had one, it had a 289.

 

[DirtDonk]

Old-time name was a "surge-tank" (and burp-tank) and it was typically installed in vehicles where the manufacturer felt that a cap in the top of the radiator was not sufficiently high enough to be considered the highest point in the system. The thinking was that it was needed to keep air pockets out of the system.
Probably put on the earliest Broncos due to the taper of the hood making the designers think that, even though a cap in the radiator WAS the highest point in the system, that it was too borderline and they needed the extra insurance of mounting the cap farther back, where the hood was a tiny bit higher.
After a couple of years, and probably a few arguments in-committee by the penny-pinchers in the group, I guess they decided that it was close enough to put it in the radiator after all.

And although it does work, anybody who'd changed their coolant often enough has probably run into minor issues with air in the system. I regularly had to aim the Bronco uphill while idling after a change, to get it to burp properly.
Some of the later model Mustangs dealt with that issue with a small air-bleed valve right on top of the engine that you had to loosen while filling.

Paul

 

[mustangtoby]

A lot of the cars in the 60's had them from Ford. I've seen them on a lot of the FE Galaxies in 62,63, although my 66 doesn't have one.

 

[DirtDonk]

Yeah, friend's dad's '66 Mustang had one too, if I remember. Hmm, or maybe it was his brother's '60-something Galaxie?

Paul

 

[Steve83]

Ford now calls it a "coolant reservoir" or "degas bottle", and it's becoming more common in all brands. CVs have had them since the early 90s at least.

 

[badmuttstang]

All the big block factory race prepped cars like the thunder bolt or cobras came with these even when the radiator had a cap just like stated this is a degas tank or expansion it serves two purposes to get all the air out of the system and it adds a Little more capacity to the system they work really well when maintained properly just like all cooling system

 

[DirtDonk]

Degas! That was the other name I was trying to think of.
Thanks guys.

Paul