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Discussion Starter · #1 ·
1968 base 4.7L, MT, w/o AC, mostly stock.
Have to replace radiator. Not stock, just an all aluminum replacement.
Purchased an aerosol Eastwood radiator black spray can. Mechanic advises not painting core fins.
Both radiator mfg, lee_racing01 and Eastwood says light spray will NOT affect cooling performance.
Most radiators I've seen were painted all black, though they were likely copper, brass and ferrous, not aluminum.

Q: Will painting a light cover coat of radiator paint on the core reduce the cooling efficiency?

Thanks
 

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Follow the manufacturer’s advise. I’ve used the Eastwood paint. It works quite well. If the manufacturer says it’s Ok, then you should be fine.
 

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Discussion Starter · #4 ·
just did an aluminum replacement radiator in 68- 289, used Eastwood radiator black spray carefully. With new rade temps down 3/4 to 1/2 on gauge.
Paint only made it appear a bit less optically new. Of course if everything is chromed under the hood, leave the thing alum if thats what you got
 

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Discussion Starter · #5 ·
Just to followup. Did in fact paint the radiator judiciously with Eastwood's black radiator paint. It was an aluminum replacement and no issues with the paint. Because the radiator wasn't
a direct fit my fan shroud (aftermarket from 2006, either AutoKrafters or perhaps WCCC if they were in business then) Anyway the shroud had to be elongated, stretched above with wire, and stretched a tad underneath to keep from hitting fan blade. side clip mount holder broke loose, shroud hit fan, well actually sh*t hit the fan and had to be removed. Ordered a repl. from WCCC but engine runs same as with it; the aluminum is a better choice than copper/brass, though not original looking, thus the desire for the paint. I'd say the paint worked well and did nothing to degrade
cooling aspect.
 
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