Radiator Overflow

[eoseitz]

Hi,

When I bought my corvette somebody had replaced the stock radiator with an aftermarket. They deleted the overflow tank. The problem is when I turn the car off the coolant expands and pours out the overflow. I was wondering if anyone knows how to connect a new overflow tank. I've seen a few on ebay for around $30. However, they appear to have 2 or 3 hoses. My radiator has spot by the cap that the antifreeze escapes. Do I need to look for a setup that has one hose. I'm assuming this has to do with pressure. How does the antifreeze go back into the radiator? Is the overflow nipple always open or is it controlled by the pressure on the cap? Any help is appreciated.

Thanks

 

[Vettehead Mikey]

The OEM design coolant recovery tank for '74s is still available from any of the popular vendors. It's a white plastic tank that sits under the passenger side fender. A single tube conducts the overflow from the radiator to the tank during hot conditions. Partial vacuum inside the radiator 'sucks' the coolant back when the engine cools.

 

[eoseitz]

thanks for the info. I'll look into one of those.

 

[eoseitz]

is this the correct tank? It says it is, but there are three lines. I'm guessing one to the radiator, one in the tank to suck out liquid, but what's the third? An overflow for the tank?

73-77 Corvette Radiator Coolant Recovery Reservoir Tank, Cap, Hoses | eBay

 

[Vettehead Mikey]

That's the correct tank and the third line is an overflow that simply hangs next to the tank as you suspected. The seller is incorrect- this tank will not fit a '73 properly


Here's how it mounts:

http://www.parts123.com/parts123/yb.dll?Parta~ShowPicTxt~Z5Z5Z50000050g~Z5Z5Z5GAVHE

 

[eoseitz]

Thanks. I think I will go with that. I'm guessing that's about the cheapest I'll find one that includes the cap and hoses.