SanDiegoPaul

I'm using a copper/brass radiator that I put in with the stroker a few years back. I also at the time got a new recovery bottle from one of the forum vendors. But as you all know, this isn't actually a sealed system. My problem is that the cover comes off the recovery bottle just enough to splash coolant over the header and inner fender liner on that side.

I don't know if it's poor design, with the AC pressure line being attached to the top of the fender there, or what but I'm kinda tired of it. Looking for pics of others who have gone to sealed systems or are using a different recovery bottle that is a better design? Suggestions?

SanDiegoPaul

Wow, no takers on this one.

noonie

Don't know if this is the style you have, but it doesn't leak.
I used 3/8" gas line to the rad and heater hose for the overflow. If just the right length, they are stiff enough to keep the lid in place. I keep the jug half full or less when hot.

JimT

I'm fighting a similar problem. My '72 (with air) has no overflow tank - it is an "open" system so when the coolant expands, it is puked out the overflow drain onto the ground.
I'm trying to find a tank that will fit under the fender. I tried a '73 plastic tank but it doesn't fit because of the AC and related hoses. The long tube type tanks will not fit and the recommended steel tank looks like it won't fit either. I would like to hear from someone who has a '72 and has an overflow system installed that actually works.

...Roger...

You guys can use just about any container you can fit in the space you have,just make sure the hose coming from the overflow nipple goes to the "bottom" of the container This allows the radiator to puke and then draw the coolant back in after it cools.

edit- reread your post-try the 78 coolant tank-the coolant "in and out" is from the bottom of the tank-beats the old tubes in the top

73StreetRace

I used a Canton Racing Products 4 quarts aluminum recovery tank, and I like it :

http://www.summitracing.com/parts/CTR-80-211/

Absolutely no leak !

But the bracket wasn't included, I had to make one...

Mike Ward

It pukes because it's overfilled or you have a weak rad cap. Adding a recovery tank will just mask the symptoms.

SanDiegoPaul

No, it's not radiator pressure causing the cap to come off - it only happens on hard cornering. I fill it to the 'full hot' line which is only about a third up from the bottom of the tank I think.

Like you say, it will pop off from pressure too though. A couple years after the stroker transplant, I found the cap coming off the recovery bottle after I'd redline it through the gears. Anything over 5,000 RPM would make the radiator release a bit of pressure and the overflow cap would come off. I did put a new rad cap on it back then.

Now, the only time I have the problem is on real hard cornering.

Mike Ward

I was responding to the post from JimT. Sorry.

Try using a '78 and up tank as Roger suggested.

JimT

Thanks Mike and Roger, I'll try the '78 tank and let the forum know if it works.

noonie

Your cap should snap on, but maybe it's not as tight as it should be. Mine doesn't come off even while cornering.

Why don't you try just putting a european style hose clamp on the cap. They are the ones without the holes thru them and are available a lot narrower than the othersand should fit on the cap under the hoses. Came on BMW etc.
That should fix it for ya.

http://www.clipsandfasteners.com/Nor...amps_s/671.htm

SanDiegoPaul

I get it - kinda like a C.V. Boot Clamp. Hey, great idea!!

budavid

I'm on the same way with the 82 tank, seems that fits right inside behind the wheel well, but I'm facing the problem of the expansion valve which blocks the way to slide in the new tank, I'm waiting for a JTR sight glass + bleeder valve for the upper radiator hose, as soon as it arrives, I'll remove the expansion valve and put in the tank.

I hope everything goes right

CFD E59

Nice set up 73streetrace

...Roger...

Looking Good

martinsw

I got a ~1 quart alum bottle w/screw on cap from fibertech out in santee. No sight window on the bottle, so I ran a clear line from rad overfil to the new bottle and working great. Had to do a custom bracket to mount on driver side.

I like the setup 73streetrace put in also.

73StreetRace

JimT

Tried the '78 overflow tank and it also will not fit on my '72 - as with the '73 tank the AC plumbing is in the way. I can slide the tank in up from the bottom rear of the wheel well but cannot get it to the top of the fender, too tight of a fit. Oh well, I'll try something else.

...Roger...

Thats nice to know for future reference.
It appears that in and around 1978 GM got away from the tubes going in from the top through the cap. I like the later design of the tube coming in the bottom , maybe try looking at other GM cars 78 and up for a smaller tank. Smaller the engine , smaller the tank ???

gkull

no picture, But I have the Summit or Jazz black 2 quart return bottle that i drilled holes on the back of the passenger fender down low. So the bottle drain valve is actualy just above the lower lip of the body panel.

I also did the NASCAR thing with the exit boil over line. It is placed squiring straight up over on the passenger edge of the window. So if it is boiling over you start to see a steam jet shooting up.