Overflow Tank - Custom Fab

[Powerhouse]

So..I wanna make an overflow tank for my P7...Does anyone know if it needs to have a vacuum tight top..or can it just be a hose going into a bucket?

[BobT-47P15]

My overflow tank is a Miller Lite beer can attached with a piece of wire.

If it overflows, it won't be returned to the engine.

Had to make the item for the HAMB drags a couple years ago.

[Normspeed]

I had to make one up for the antique nationals last month. It was a run-whatcha-brung setup. I run a 7 lb radiator cap with the rubber washer removed so it's zero lbs. I'm not sure if it would return the coolant to the tank.

I saw some nice modern kits at kragen with a white plastic tank and all the fittings for less than $10.00.

[Powerhouse]

NEAT Canteen... I like the old cover...

So I guess ya need vacum to make it go back in the radiator.????

[Normspeed]

I think so. Truth is, these setups will spill a little coolant right at first after being filled, find their own level, and probably never spill another drop unless the motor gets overheated to boiling. I only installed mine to get past the tech inspection for the nats.

[John Mulders]

I am the overflow for my beercan/bottle, not returning either

[Grandadeo]

Did they even lift your hood? We won't discuss the helmet tech inspection.

Lee

[Normspeed]

Nope, they forgot to look under the hood. All the helmets I brought were years out of date, I never knew they had an expiration date. They let me off with a stern warning about next time. Then they didn't require me to put on a helmet to race! I guess they figured I couldn't go fast enough to hurt myself. One guy in staging was wearing one of those dirt bike helmets with the long nosepiece.

[Powerhouse]

Reminds me of a hot rod i saw once when i was still living on long island...the air cleaner was a ww1 german helmet & the overflow was a ww1 US canteen

[Powerhouse]

ok...how's this for whatever i found in the garage..hehehe

[Powerhouse]

I don't know about HAM..but I just wanted to make one to see if the Radiator is overflowing or not....

[Normspeed]

Norm, for the HAMB drags and the Antique Nationals, I guess they're worried that our cars might spill coolant on the dragstrip, and the faster more powerful cars (furds and chebbies) might get squirrely on it.

[Lou Earle]

you need to teach them how to use a litter box. Nothing worse than a non garage broken Plymouth peeing on your nice concrete.

[BobT-47P15]

I think the deal at the hamb drags is to keep any antifreeze off the

track when the engine gets hot from racing.

[knighthawk]

I think.... the only need for an over flo tank ( aside from the drag strip thing ) is to add a gallon or so more capacity of coolant. Without it, your rad water expands, over flows when hot, and then when it cools down , draws air back in, giving you an lower water level ( ''seeks it's own level'' ). By adding the expansion tank, it will draw water back in , keeping it full to the top. The bottle or tank is open, I used a 1 quart orange juice bottle on my '55 Merc, a gallon antifreeze jug in the fender well on my '67 Toronado. BUT , the rad cap has to be the correct one, with double rubber gaskets, or it won't seal to draw it back in .