Daveinspain

Ok lm really climbing the walls waiting for my 1971 coupe to get shipped to Spain. As a result I spend ridiculous amounts of time on line looking at Corvette videos, web sites, forums registries and anything Corvette related. Yes I am obsessed... So I’m looking at a beautiful, perfect 1970 coupe, in Bridgehampton Blue, just like mine. As the guy making the video opens the hood and starts videoing the spotless engine compartment I see this odd, aluminum looking, tank canister thing right where the factory air compressor would be if it had one. I’m like, what the hell is that? Most likely it’s something everyone here recognizes and knows what it for but I’ve never noticed one like it before. Is it some sort of vacuum tank, windshield washer water deposite, nitro injector for that fast and furious afterburner boost... Ok, I’m really speculating now so what is it?

Redvette2

You got the fever just like the rest of us...that is the radiator fill/overflow tank! I think on this model it does not have a radiator cap on the radiator itself.

Redvette2

L-46man

Radiator tank is WHERE YOU FILL THE RADIATOR..... do not remove the cap on the radiator....generally only use the over flow tank....otherwise you break the suction between the two.....no big deal...but you'll make a small mess.

This is sticking way out into the engine compartment because this car has A/C. In regular cars the tank is tucked much further toward the edge of the fender.

Try playing out your obsession for 45 years.....then call me! LOL.

Bought mine when I was 21!

CraigH

The tank is not fitted to all, depends on radiator transmission option etc

Daveinspain

This will be my 4th vette.., had a 68, 78 and an 84... Yeah I guess I should have know but it just looked odd...

FuriousFred

Yep , the overflow /Reservoir /Tank, but í´ve not yet seen it mounted the way your picture shows��
Regards
Freddy

L-46man

Blond Girl goes into a dealership and says, "I lost a part of my engine at a gas station"....parts guys says "what is it?" She says "I don't know, but I remember the part number!" The parts guy says" AMAZING, what's the number?" She says 710.............carry on! Unkahal

Redvette2

You should get the 1971 AIM (Assembly Instruction Manual) if you really want to see how your car is made. Really helps to understand what goes where. You can buy one or get a PDF copy for free on this site.

Redvette2

Mooser

Even with A/C I've not seen one mounted out there, also the A/C lines seems different shape maybe than what I'm used to seeing


M

aquaroscoe

Not on/or brass one for AC cars. No room for the tank due to the AC stuff

Daveinspain

I am getting the manual with the car... Its included with two binders filled with the work history on the car going back to the original owner... I’m not a blond by the way, I’m a grey haired 63 year old kid...

gbvette62

I don't see an air conditioning compressor on the car in the OP's post, but since the car has the evaporator box on the firewall, it obviously had AC at some point. Since it was an AC car, it shouldn't have the expansion tank, but then it looks like a lot of other things have been changed on that car too.

The aluminum expansion tank was only used on 68-72 base motor cars with a manual trans, and without air conditioning. Base motor, manual trans, no AC cars used the 19" aluminum radiator, which didn't have any tanks on the radiator, so they needed the separate aluminum expansion tank. 68-72 base motor cars with an automatic trans and/or air conditioning, and all optional small blocks, used a copper radiator that had attached tanks, eliminating the need for the expansion tank.

69-72 big blocks with air conditioning, also used an expansion tank, but it was a long round copper one, that looked nothing like the aluminum small block one.

Redvette2

I'm not blond either but it still took me a few seconds to figure out the 710 joke. Ha Ha....good one.

Redvette2