Recovery tank hook up question

[rockyrivermark]

1970 c10
350 cu 350 auto
4 row brass/copper radiator
Searched forum already

I got an aluminum recover tank and going to install it soon
2 questions

1. I read that I'll need a 2 way radiator cap. Not quiet sure the difference or where to purchase that.
2. I have two hose nipples. I know one connects to the top of radiator.
So the other hose somehow ties back into the radiator or hose?
How is that generally hooked up in our trucks.
Radiator hose fitting with a tee in it?
Thanks for any advise you can offer.
Mark

[Stocker]

You need a cap for a sealed system, which means it's made for pretty much any newer vehicle. Not sure what year(s) that actually started, though. Any decent auto parts store can sell you a cap for a sealed system.

Dunno about two hose nipples..... my aftermarket recovery tank has just one, at the bottom of the tank. Other end of the hose connects to the radiator nipple, just under the cap. Do you have a pic showing the two nipples?

[rockyrivermark]

Originally Posted by Stocker

You need a cap for a sealed system, which means it's made for pretty much any newer vehicle. Not sure what year(s) that actually started, though. Any decent auto parts store can sell you a cap for a sealed system.

Dunno about two hose nipples..... my aftermarket recovery tank has just one, at the bottom of the tank. Other end of the hose connects to the radiator nipple, just under the cap. Do you have a pic showing the two nipples?

So if I have this right. Yours with only one hose is an overflow tank and doesn't feed coolant back into the system when engine cools.
This unit will work as a recovery tank thus pulling coolant back into the system.
Just not sure how to hook up that hose back into the system
Posted via Mobile Device

[Stocker]

Originally Posted by rockyrivermark

So if I have this right. Yours with only one hose is an overflow tank and doesn't feed coolant back into the system when engine cools.

No.... Mine has one hose that goes from the radiator nipple (just under the rad. cap) to the bottom of the recovery tank. I have a rad. cap for a sealed system. The radiator is totally full of coolant, all the way to the top. When I shut off a hot engine, coolant is puked through the hose and into the recovery tank. As the engine cools, the sealed-system cap allows coolant to be sucked out of the recovery tank and into the radiator through the same hose.

I hope that explains it. If I had the stock rad. cap, the coolant would still puke out, but it could not be sucked back into the radiator as the engine cools. That's why you need a cap for a sealed system.

[rockyrivermark]

Originally Posted by Stocker

No.... Mine has one hose that goes from the radiator nipple (just under the rad. cap) to the bottom of the recovery tank. I have a rad. cap for a sealed system. The radiator is totally full of coolant, all the way to the top. When I shut off a hot engine, coolant is puked through the hose and into the recovery tank. As the engine cools, the sealed-system cap allows coolant to be sucked out of the recovery tank and into the radiator through the same hose.

I hope that explains it. If I had the stock rad. cap, the coolant would still puke out, but it could not be sucked back into the radiator as the engine cools. That's why you need a cap for a sealed system.

Oh cool. Yeah that works. Just need to plug one of these ports.
Thanks
Posted via Mobile Device

[Stocker]

Glad that helps! Not sure, but it's possible the second port is for an overflow dump tube in case your tank gets overfilled.

[cheyenne shortstep]

Don't plug the top nipple, it is the overflow. You should run a hose from the top of the tank to somewhere it can drain under the vehicle.