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post #1 of (permalink) Old 03-28-2001, 12:55 PM
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I've rebuilt an '80 CJ7, replaced the 304 with a "warmed up" 360 and would like any suggestions on a new radiator.

I do most of my wheeling in AZ and CA deserts and had trouble with the old radiator keeping the 304 cool.


1. Should I go to an Aluminum Radiator?
-If yes who makes one?
2. Will an Electric Fan, with an Aluminum Radiator, work better at low speeds?
3. Or any other suggestions?

Thanks for your help!

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post #2 of (permalink) Old 03-28-2001, 06:51 PM
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Re: Radiator?

I had the stock 2 core 6cyl rad in front of my 304 and I lived in fear of traffic on hot days ( yes it does get hot in Canada) temp climbed in the woods but I took it to the rad shop and they put a 4 core hi- efficiency brtween the stock tanks and it made all the difference in the world and this is with the stock fan 3" away and 1/2 a shroud. Cost about $260 cdn. I'm sure this is less expensive than an aluminum rad.

81 CJ7 304/904/D300 scout 44's locked, full cage, 33"wildcats, warn HS9500i, bush bar from hell and diamondplate sides to cover gaping rust holes!! Coming soon OBA!!
post #3 of (permalink) Old 03-28-2001, 10:34 PM
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Re: Radiator?

[img]/wwwthreads_images/icons/smile.gif[/img] Some time back, TeamRush and I were both working on AMC V8 engines and the very same thought popped into each of our heads when we took a look at the water pump setup. The 304 has an ENORMOUS water by-pass on the water pump assembly. What the by-pass does is recirculate hot water back to the block instead of sending it to the radiator for cooling. My approach is to eliminate the short by-pass hose altogether, and just depend on the heater loop. Our heater hooks to the front of the thermostat housing and returns to one of the water pump side inlets. Be sure that you drill an air burp hole in the flange of that thermostat.[img]/wwwthreads_images/icons/crazy.gif[/img]

Quadra-Tracs modified While-U-Wait by the crack moonguy[img]/wwwthreads_images/icons/wink.gif[/img] Quadra-Trac Team.[img]/wwwthreads_images/icons/tongue.gif[/img][img]/wwwthreads_images/icons/smile.gif[/img]
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post #4 of (permalink) Old 03-28-2001, 11:51 PM
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Re: Radiator?

I had a Modine #583 3 row stock replacement radiator. It cooled my 401 fine. I did upgrade to a 4 row radiator, and now I do heat up a little more, but only when I am idleing and moving slow. The problem is that I don't have a fan shroud, as soon as I get some air flow from increased RPM's or moving a little faster, it cools right down. I have also done the CJ Dave bypass modification, but instead of removing the bypass, I restricted it. It didn't seem to make any differance. My recomendation is the Modine 3 row radiator. It was a lot less expensive than my 4 row, and worked just as well.


post #5 of (permalink) Old 03-29-2001, 12:43 AM
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Re: Radiator?

I got a griffin through jegs for $179.00 I took it to a welder who fabricated aluminum brackets for $25 and then you have yourself an aluminum radiator for about 2 bills...not bad, looks great and most important-IT COOLS! Look online at Jegs performance racing. ~~TIM~~~

--->"Some people go through life thinking they hit a triple: But they were actually born on third base."

post #6 of (permalink) Old 03-29-2001, 10:25 AM
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Re: Radiator?

A 4 row should be tons enough to cool one. A 3 row Should really be able to also, thats all the 360ed waggy's with A/C had. And yes a 3 row will be alot cheaper than a custom 4 row.

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