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Radiator failure - Replacement suggestions

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Old Oct 26, 2020 | 12:01 PM
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Default Radiator failure - Replacement suggestions

It is amazing how our factory radiators seem to crack in the exact same way. Clearly this unit is failing to maintain pressure and needs to be replaced; an attempt to repair it will likely be temporary at best and catastrophic at worst.

I am leaning heavily towards an upgrade; if you agree or disagree please chime in. My engine is currently stock aside from LT headers, it will get power-adders later when it is no longer my DD, so I figure upgrading now is not a bad idea and I can't imagine a bit of extra cooling ability being a bad thing.

This is one I had in mind as it appears to be a direct replacement. Car is a manual, so the AT cooler portion I suppose is not needed?

ECP radiator



Last edited by Kagnus; Oct 26, 2020 at 12:24 PM.
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Old Oct 26, 2020 | 12:29 PM
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Originally Posted by Kagnus
It is amazing how our factory radiators seem to crack in the exact same way. Clearly this unit is failing to maintain pressure and needs to be replaced; an attempt to repair it will likely be temporary at best and catastrophic at worst.

I am leaning heavily towards an upgrade; if you agree or disagree please chime in. My engine is currently stock aside from LT headers, it will get power-adders later when it is no longer my DD, so I figure upgrading now is not a bad idea and I can't imagine a bit of extra cooling ability being a bad thing.

This is one I had in mind as it appears to be a direct replacement. Car is a manual, so the AT cooler portion I suppose is not needed?

ECP radiator


stock works pretty good.

Yikes I just reread and you're going to modify. Therefore yes on aftermarket and I have that ECP and the drain valve is a POS.

Last edited by My Vette Life; Oct 26, 2020 at 12:51 PM.
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Old Oct 26, 2020 | 01:19 PM
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Originally Posted by My Vette Life
stock works pretty good.

Yikes I just reread and you're going to modify. Therefore yes on aftermarket and I have that ECP and the drain valve is a POS.

How much of a POS is it and why?
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Old Oct 26, 2020 | 02:03 PM
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Originally Posted by Kagnus
How much of a POS is it and why?
​​

This is just me, it had that old school butterfly style which is what I'm used to and thought it was a bit spongy while trying to turn it.

It was leaking at the threads even though it had Teflon wrapped and was on tight. when I tried to drain it the butterfly just kept spinning, It's been swapped to the electrode thanks to a forum member.

At the time I daily drove my c5 and Yes it's only a few dollar fix but if it leaks on you and you have no tools or far from home.

Again it's only a $5 fix and not saying the radiator is junk, just that drain valve. It's a bigger radiator so takes a bit longer to warm up since you daily drive so you know.
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Old Oct 26, 2020 | 03:42 PM
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Originally Posted by My Vette Life
​​

This is just me, it had that old school butterfly style which is what I'm used to and thought it was a bit spongy while trying to turn it.

It was leaking at the threads even though it had Teflon wrapped and was on tight. when I tried to drain it the butterfly just kept spinning, It's been swapped to the electrode thanks to a forum member.

At the time I daily drove my c5 and Yes it's only a few dollar fix but if it leaks on you and you have no tools or far from home.

Again it's only a $5 fix and not saying the radiator is junk, just that drain valve. It's a bigger radiator so takes a bit longer to warm up since you daily drive so you know.

Electrode? This replaces the butterfly valve? I have never heard of this.
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Old Oct 26, 2020 | 04:05 PM
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Why not upgrade? I went with a DeWitts radiator with oil cooler. It handled my LS3 all day at the race track and had no issues.
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Old Oct 26, 2020 | 04:53 PM
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Originally Posted by Napoleon_Tanerite
Why not upgrade? I went with a DeWitts radiator with oil cooler. It handled my LS3 all day at the race track and had no issues.
Upgrading is what I am planning on, but I have no plans to track it at this point. A Dewitts unit is mighty expensive, $600+ is a bit out of my price range. I currently a student working part-time so my budget is a bit limited. The ECP unit is only about $260. For my DD it looked like a reasonable option.
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Old Oct 26, 2020 | 05:00 PM
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I recently installed an ECP radiator. Details here:
https://www.corvetteforum.com/forums...-remedies.html
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Old Oct 26, 2020 | 05:04 PM
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Originally Posted by Kagnus
Upgrading is what I am planning on, but I have no plans to track it at this point. A Dewitts unit is mighty expensive, $600+ is a bit out of my price range. I currently a student working part-time so my budget is a bit limited. The ECP unit is only about $260. For my DD it looked like a reasonable option.
Do what you feel you have to, but for a project car (and whether you like it or not, a 20+ year old car IS a project car) you should never pass on an opportunity to upgrade. At some point you will get a hair up your *** to upgrade something else on the car, and then have to come back and spend the money you should be spending NOW to upgrade the radiator.

Case in point-- I pulled my fuel tanks for bad sending units two years ago. At the time I had no plans on doing any power upgrades. I figured since I was in the tanks anyway I might as well upgrade to C6Z fuel pumps (my car is late 03 so I have the C6 fuel system). About two years later my LS6 let go and I decided to put in an LS3. Now I didn't need to upgrade the fuel pumps (with the associated NIGHTMARE of dropping the fuel tanks). Same goes for the radiator-- I put in my Dewitts before the LS3 was in the cards.

Dig through the couch, roll your pennies. Buy once, cry once.
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Old Oct 27, 2020 | 07:32 AM
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I just replaced my 19 year old radiator with a new replacement from amazon. $69 shipped. I figured if the original plastic radiator lasted that long, the replacement should last the duration of my ownership. No problems thus far. The only thing I didn’t care for was they are all automatic radiators these days that have the provisions for the transmission lines.
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Old Oct 27, 2020 | 10:07 AM
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I've ran ECP for 4 years with 402 and supercharger. I've had no issues with it and works great. Lifetime warranty so I'm good with it. I've got another buddy with one and he has had it longer with no complaints.
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Old Oct 28, 2020 | 12:13 AM
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The electrode is an anode rod. It helps prevent corrosion of the aluminum, put in place of the drain. Bought it with the radiator, ECP.
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Old Oct 28, 2020 | 09:08 AM
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Originally Posted by Napoleon_Tanerite
Why not upgrade? I went with a DeWitts radiator with oil cooler. It handled my LS3 all day at the race track and had no issues.
Second th DeWitts. Had it cooling a 427 with 25% underdrive pulley for 15 years now. Absolutely no issues.... 🤞🤞🤞
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Old Oct 28, 2020 | 09:09 AM
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Originally Posted by Scottrx7tt1
I just replaced my 19 year old radiator with a new replacement from amazon. $69 shipped. I figured if the original plastic radiator lasted that long, the replacement should last the duration of my ownership. No problems thus far. The only thing I didn’t care for was they are all automatic radiators these days that have the provisions for the transmission lines.
Or an engine oil cooler.....
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Old Oct 28, 2020 | 10:30 AM
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Originally Posted by grinder11
Or an engine oil cooler.....
Can it be used as such? My car is a manual so the AT cooling portion will go unused.
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Old Oct 28, 2020 | 06:48 PM
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Ecp has radiators for manual corvettes, check their website. Accessory page has the electrode(anode rod) for 5 bucks.

http://www.speedcooling.com/Corvette/

Last edited by punz; Oct 28, 2020 at 06:52 PM. Reason: added content
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