Over flow tank

[danaspider]

Hoping can get someone to look at their overflow tanks. I just received a new overflow tank. On the outside it looks identical to the original tank. But when you look inside of the old tank you see there is an extension pipe that extends up to about the minimum lavel mark. On the new tank there is no extension, the overflow tube just comes into the bottom. If you look at the tank in relation to the top of the radiator, the minimu fill line is about even with the top of the radiator. And the little extension in the tank maintains that level. Now with the extension you are not pulling liquid from the bottom of the expansion tank.

Just want to know what is correct, or how folks are running theirs.

[kilrwail]

The top of the rad is at the same level as a point about 1/2" above the metal band. The Minimum fill mark is 1/4" below that band. The overflow nipple extends upwards on a 45 deg angle from the fitting on the bottom front, ending 4.5" from the top of the filler neck - which is halfway up the metal band. At the Minimum fill level, no coolant can be drawn out of the reservoir.

[danaspider]

Thanks for the response Peter, I had made a nipple to fit inside the tank. Now the real issue is how many people are getting replacement tanks that do not have the extension and what is the affect on behaviour of the cooling. Does make for an interesting conversation.

Will be interested in seeing responses on that point. Should it be there or does it not really matter.

Hmmmm

[carl55]

Hi Dana
I will venture an opinion. It is my understanding the extention tube does not allow any debris from going into or back into the radiator. My $.02.

Carl

[skumandeth]

As far as any effect on the cooling system there would be no difference. I agree it would keep debri from going back into the radiator but, that is the only thing I can think of. Almost all modern cooling systems just have a hose going to the bottom of the tank.

[manoa matt]

If you can, find an original tank. They are made of thicker plastic, and hold up to the heat much better.

[mdrburchette]

I put a new tank on my 72 13 years ago and haven't had a problem. It seems the tube in the 71 overflow jug is metal and all rusted out so I guess it was meant to dissolve after so many years and wasn't all that important.

[So Cal Mark]

I don't think the engineers ever designed parts of the cooling system to dissolve. That's why they recommended changing the coolant every couple of years

[mdrburchette]

You're not saying the PO was slack in maintenance, are you Mark?

[DoctorPDR]

I bought a new over flow tank from XYZ Company. It looks identical to my old one. I replaced my old one because I was sick and tired of looking at a dirty overflow bottle, even though it was clean. It was dark yellow, almost brown in color. Not to mention, I couldn't see the level of coolant in it.

I have installed the new purchase into my car. The only complaint I have is that it is a bit smaller in diameter. Which means I had to put some material on the inside of the strap to keep it from falling down. I really wish XYZ Company would advise people of this kind of information prior to taking an order. It would eliminate a lot of "pissed off attitudes" I get when things don't fit properly. And this isn't the first time this has happened either.

I have ordered many more parts through XYZ compared to IAP, but when placing orders through IAP they always advise me of EVERYTHING. Wish every company operated this way.