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Old 10-03-2013, 12:07 PM
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Coolant recovery tank

I have one of those 19"x 2" cylindrical coolant recovery tanks and it has no markings on it as to how much to put in it. I filled it to the top of the inner overflow tube figuring that it would kind of self level. Also I am using the original radiator modified for the 350 chevy that's in it. I have a 7 lb. cap on it and I have heard that these old radiators had a tendency to "weep". Agree or disagree with all this? Thank you.

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Old 10-03-2013, 01:12 PM
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Quote:
Originally Posted by rustman View Post
I have one of those 19"x 2" cylindrical coolant recovery tanks and it has no markings on it as to how much to put in it. I filled it to the top of the inner overflow tube figuring that it would kind of self level. Also I am using the original radiator modified for the 350 chevy that's in it. I have a 7 lb. cap on it and I have heard that these old radiators had a tendency to "weep". Agree or disagree with all this? Thank you.
I might be all wet, but I thought a coolant recovery tank was supposed to recover coolant. If you fill the tank up, how is it going to recover anything? If I were teching your car at the drag strip, I'd ask you to empty the vessel.
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Old 10-03-2013, 03:16 PM
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Quote:
Originally Posted by techinspector1 View Post
I might be all wet, but I thought a coolant recovery tank was supposed to recover coolant. If you fill the tank up, how is it going to recover anything? If I were teching your car at the drag strip, I'd ask you to empty the vessel.

I agree, no coolant is needed in the recovery tank. it will fill when the coolant is pushed out of the radiator & return as it cools if enough is pushed into the tank.
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Old 10-03-2013, 03:39 PM
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Now I see why your the #1 techinspector. If I have coolant up to the top of the overflow tube and the radiator dumps hot water into the tank it's going out the tube onto the ground so that recovery tank water level stays the same. The water level in the radiator drops until it is no longer expanding into the recovery tank and by then I am running hot. Thank you.
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Old 10-03-2013, 04:01 PM
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THe coolant level in the recovery tank needs to be above the overflow hose from the rad. The end of the hose needs to be close to the bottom. When the rad heats up the coolant fills the tank and the air bubbles to the surface. When the rad cools, the coolant is drawn back into the rad. If the hose end is uncovered the rad will draw in air and act just like a rad without a recovery system and liquid level will settle at about 2 inches down from top of rad.
What's your original rad from?
Some old rads aren't made for any pressure at all!
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Old 10-03-2013, 04:08 PM
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These gadgets usually come without any sort of instruction so you are supposed to know how, as an automobile enthusiast, to install them - wrong!!!

You have to open the cover, see which tube inside is the short one and then attach the radiator overflow line to it - the long tube inside dumps to the ground in case that tank completely overflows. If you hook it up the other way, goodby coolant (ask me how I know this - yep, a senior moment).

Fill the radiator - the tank will just recover the fluid pushed out for whatever reason then it will eventually siphon back to the radiator as long as you have a pressure cap on the system
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Old 10-03-2013, 04:09 PM
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Quote:
Originally Posted by techinspector1 View Post
I might be all wet, but I thought a coolant recovery tank was supposed to recover coolant. If you fill the tank up, how is it going to recover anything? If I were teching your car at the drag strip, I'd ask you to empty the vessel.
confused, as the cars I've had had a coolant tank with a "fill to this line hot" and it was about 2/3rds full at that line,

And my 71 c-10 doesn't have anything, just a hose running down the side of the rad. And I want to build a tank, would it be like the 80's cars with it 2/3rd filled or empty like you are say'n until a boil over and then sucked back in afterwards basicly always being empty providing the hose in the overfollow you listed hose collected every drop when it was being sucked back in..
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Old 10-03-2013, 04:45 PM
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Originally Posted by gearheadslife View Post
confused, as the cars I've had had a coolant tank with a "fill to this line hot" and it was about 2/3rds full at that line,

And my 71 c-10 doesn't have anything, just a hose running down the side of the rad. And I want to build a tank, would it be like the 80's cars with it 2/3rd filled or empty like you are say'n until a boil over and then sucked back in afterwards basicly always being empty providing the hose in the overfollow you listed hose collected every drop when it was being sucked back in..
You could retrofit one from a 74-80 chevy truck gearhead!
Check on LMC. THey're 20 bucks with cap. I used one on my old 67 gmc. The 74-80 one has ears on it to bolt it to the rad support.
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Old 10-03-2013, 07:21 PM
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These gadgets usually come without any sort of instruction so you are supposed to know how, as an automobile enthusiast, to install them....
I have one of the stainless tubing style puke tanks on my Model A. The puke tank should be about half full of coolant. Here's the instructions, Irelands child and RWENUTS get an "A+" on their puke tank score cards....
http://www.fifthaveinternetgarage.co...nk_instruc.pdf

You can see the puke tank mounted on the far side of the radiator in this picture... never had it puke so I guess it does it's job!

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Old 10-03-2013, 09:34 PM
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Quote:
Originally Posted by gearheadslife View Post
confused, as the cars I've had had a coolant tank with a "fill to this line hot" and it was about 2/3rds full at that line,

And my 71 c-10 doesn't have anything, just a hose running down the side of the rad. And I want to build a tank, would it be like the 80's cars with it 2/3rd filled or empty like you are say'n until a boil over and then sucked back in afterwards basicly always being empty providing the hose in the overfollow you listed hose collected every drop when it was being sucked back in..
Sorry, I was thinking of a minimum 16 oz. overflow vessel like used in drag racing, not a coolant recovery system.
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Old 10-03-2013, 10:28 PM
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Quote:
Originally Posted by RWENUTS View Post
You could retrofit one from a 74-80 chevy truck gearhead!
Check on LMC. THey're 20 bucks with cap. I used one on my old 67 gmc. The 74-80 one has ears on it to bolt it to the rad support.
I figured a newer one could be used,
I saw a set up at a shop that took up no underhood working room, it was cheap to make too.
just a piece of pvc pipe with a cap glued on the bottom and a drain plug/pecock and a cap on the top with a elbow barb fitting to hook the hose to.. and fits infront of the coresupport between the core and grill. it looked like it was 18-20" long silly simple, and it was painted black so it blended in and wasn't as noticeable.
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Old 10-03-2013, 11:07 PM
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Just thought that you might be interested in a picture of the "Coolant Recovery Tank" I installed in my '63 T'Bird!



Works like a champ!!

Tom
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Old 10-04-2013, 01:43 AM
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So how come I didn't get any stinking instruction? Thanks very much for posting them. Actually I did get a one page showing which tube to hook your overflow tube to but it said nothing about how much coolant to have in the recovery tank or to leave it empty. I think it should have some to make sure you don't end up with air being drawn back into the radiator. If that happens, when you release the cap you have coolant spilling out.
If I didn't say so before I have the original 36 Ford radiator re-plumbed for the 350 Chevy which is suppose to have 450 hp. and it has A/C. So far I am amazed at what a great job this radiator does (knock on wood. I took it to a neighboring town this summer and it was in the mid 90's and with the a/c on it got up to a little over 200 degrees. I checked it with an infrared gun and the gauge is pretty accurate. I have a 180 degree thermostat in it. I need to check it since it seems to take quite awhile for it to get up to temperature. I am thinking that maybe it is not completely closing when cool. Anyway, thanks very much for all the input. I will try draining all but 16 OZ out of the recovery tank and give it a try. I think I will go back to the way we used to do it and leave the upper tank level about an inch from the top.
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Old 10-04-2013, 08:28 AM
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If you leave it an inch from the top and use a recovery tank the level in the rad will slowly go down and eventually you'll start running hot.
Put enough fluid in the recovery tank to cover the hose end by 2 inches, fill the rad to the top and run it. After the first cool down check and maintain the level in the tank.
Or just set it up the old way a couple inches down and use the tank as a catch can.
How do the tanks on your original rad like the pressure? THey weren't made for even 7 lbs.
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Old 10-04-2013, 10:06 AM
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i consider those 2'' diameter tanks more of a puke tank than an actual coolant recovery/fill tank
i made mine out of 3'' ss exhaust tubing about 14'' long with no way to check the level. it holds about 1.5 quarts.
i just fill the radiator to the top when the coolant is cool, any radiator that is full will burp fluid out as it gets warm.
when the engine warms up it will burp out any expansion fluid and when it cools down it should suck everything back into the tank.
i'm under my hood often enough to keep an eye on the radiator level

3'' 304 ss tube. capped on both ends. fill drain fitting near bottom. vent tube welded in bottom is cut at an angle and run to the top of the tank.

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