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Radiator O rings ?

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Old Aug 28, 2023 | 07:30 PM
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Default Radiator O rings ?

I did not know that radiators with automatic line connections had o rings .
Have never had a brand new radiator, got one from Champion and noticed the o rings.
At 76 one would think that i would of seen it. Radiators from the junk yard or just having one repaired and never noticed it, have probably put in 10 or more.
Learn something new every day.
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Old Aug 28, 2023 | 09:34 PM
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Is there a part number for that? I was pretty sure they were just flare fittings, like a fuel or brake line.

https://www.zip-corvette.com/69-82-a...tlet-pipe.html
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Old Aug 28, 2023 | 10:34 PM
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My '72 only uses the two flare fittings for the radiator/trans cooler -- no o-rings at all.
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Old Aug 28, 2023 | 10:58 PM
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Having this Champion radiator installed tomorrow in my 75, just checking it out an noticed the o-rings INSIDE the inlet/outlet openings.
I guess the installer will tell me go/no go, i never noticed it before in my 75 and we have had the radiator out for repair 4 times now, so just went with a new unit.
Will let you know tomorrow.



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Old Aug 29, 2023 | 09:21 AM
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It’s been a few years since I had an automatic in my ‘79, but I didn’t know that either. I thought they were a conventional flare fitting. Perhaps the o-ring style is a new style? Let us know how it works out.
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Old Aug 29, 2023 | 11:11 AM
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Why don't you just call Champion Radiators and ask them? Their phone number is right on their web page. Why post the question here where nobody knows anything about Champion radiators?
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Old Aug 29, 2023 | 07:55 PM
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Lars That was the first thing i did in the AM, yes the new radiator has o-rings, Champion has started putting the o-rings in some of their radiators. The tech guy explained that's its a soft rubber o-ring to fill any voids that the flare doesn't get.
The Champion radiator part # was AE478
Auto Zone # was A478
Found 3 other suppliers with 478 in their part number so it must be a universal radiator--just not sure who is actually the manufacture is tho.
Anyway, it fits without any mods, will put the shroud extension on and reinstall all of the foam sealers tomorrow. Still runs at 195.



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Old Aug 30, 2023 | 01:10 PM
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Well, I didn’t read the OP’s post as a question to the hive mind, more of an FYI. No where did he ask the question of why, so I wasn’t triggered. Lol
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Old Aug 30, 2023 | 01:21 PM
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I'm sure they looked at their return rate, and decided it was more advantageous to add a o-ring where none had existed (and doesn't belong) than to get more returns from folks with corroded trans cooler lines, or who don't have flare nut wrenches, or whatever the reason for the leak may be.

I prefer my solution of using radiators that do not have auto trans coolant loops.
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Old Aug 31, 2023 | 10:40 AM
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Originally Posted by Mod75
Lars That was the first thing i did in the AM, yes the new radiator has o-rings, Champion has started putting the o-rings in some of their radiators. The tech guy explained that's its a soft rubber o-ring to fill any voids that the flare doesn't get.
The Champion radiator part # was AE478
Auto Zone # was A478
Found 3 other suppliers with 478 in their part number so it must be a universal radiator--just not sure who is actually the manufacture is tho.
Anyway, it fits without any mods, will put the shroud extension on and reinstall all of the foam sealers tomorrow. Still runs at 195.


You state it still runs at 195.
​​What temperature thermostat?
Are you running manifold vacuum to the distributor?
What is your timing set to?
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Old Aug 31, 2023 | 07:45 PM
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The factory temp gauge stopped working years ago, i have a mechanical gauge on it, been 195 for the last 45 years.
Yes, using manifold vacuum to the distributor. Distributor modded on the Sun machine to.
2@ at 850 rpm 6@ at 1050 rpm 10@ at 1850 rpm Full at 11@ 2200 rpm
Timing is 6 or 8 i cant remember, its been a long time since the last tune up, its an auto with a 308 rear, Plugs are AC R45S gaped at 40. Hope this helps.

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Old Aug 31, 2023 | 08:05 PM
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Originally Posted by Mod75
The factory temp gauge stopped working years ago, i have a mechanical gauge on it, been 195 for the last 45 years.
Yes, using manifold vacuum to the distributor. Distributor modded on the Sun machine to.
2@ at 850 rpm 6@ at 1050 rpm 10@ at 1850 rpm Full at 11@ 2200 rpm
Timing is 6 or 8 i cant remember, its been a long time since the last tune up, its an auto with a 308 rear, Plugs are AC R45S gaped at 40. Hope this helps.
Are those numbers distributor degrees and rpm or crankshaft degrees because they are extremely low for crankshaft degrees. Even if you convert the last number to 22 at 4400 plus the 8 is only 30 and it should be 36.
Did you expect less than 195?
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Old Aug 31, 2023 | 08:15 PM
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Originally Posted by MelWff
Are those numbers distributor degrees and rpm or crankshaft degrees because they are extremely low for crankshaft degrees. Even if you convert the last number to 22 at 4400 plus the 8 is only 30 and it should be 36.
Did you expect less than 195?
No, i am happy with the 195, its the L48 low performance engine 165 hp i think was stated.
Will have to check it out when due for a tune up.
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