07-16-2018, 05:38 PM | #1 |
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radiator paint
my 31 ccpu was running hot so i pulled the radiator and sweated the upper tank off. i did a red neck core cleaning that i saw on youtube with a few upgrades. i spent most of the afternoon flushing and rodding out the tubes until i got good flow on all but one tube that had something really solid in it. i will solder everything back together and leak check tomorrow. what type of paint should be used that will look good and won't make it run hot? i did a quick search but didn't find anything.
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07-16-2018, 05:59 PM | #2 |
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Re: radiator paint
Eastwood paint, black.
I am told black paint helps in drawing out the heat. You can order on line. Enjoy. |
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07-16-2018, 06:24 PM | #3 |
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Re: radiator paint
We like the cheapo flat black from home depot in a generic rattle can. Very thin buildup though good enough coverage and good touch up after bugs and other debris scuff the fins.
This stuff doesn't seem to have as much if any acetone and other caustic dryers now used to meet epa rules. |
07-16-2018, 07:07 PM | #4 |
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Re: radiator paint
Something with a light colour will always be cooler than the same thing in a dark colour under the same circumstances. Radiators would work better if they were white and better still if they had no paint at all. I was thinking about that recently and decided that next time I needed to paint a radiator, I'd only paint the front where it can be seen and leave the back and the tanks unpainted. Mine are drivers, not show cars anyway.
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07-16-2018, 07:19 PM | #5 |
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Re: radiator paint
I have been told for the last 60+ years by many radiator repair shops upon questioning that black painted fins cool better than unpainted. That has been common knowledge for years. Whether it's true or not I really don't know
Last edited by harryc; 07-16-2018 at 07:59 PM. |
07-16-2018, 07:40 PM | #6 | |
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Re: radiator paint
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07-16-2018, 08:38 PM | #7 |
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Location: Innisfil, Ontario Canada
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Re: radiator paint
Yup Tom's got it right. I use to teach Rad repairs and in the day we would use chassis black because it was thin and dull which is suppose to give up heat better than gloss.
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07-16-2018, 08:47 PM | #8 |
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Re: radiator paint
what i learned over the years is heat penetrates black and is reflected by light covers. wear a black tee shirt outside on a hot sunny day verses a white one you'll see. there has been a debate over the years about black or chrome oil tanks on a motorcycle, black allows heat to escape while chrome reflects the heat inward. if it is 85 degrees outside and the oil is 200+ you want the heat going out. back to the radiator.... most radiators i have seen are black for the same reason. what i am really wondering is will regular rattle can paint be too heavy and act as insulation holding the heat in. i don't know what is used in radiator shops and factories, but it looks like a thin flat black. i'll go with a rustolem if nothing better is suggested.
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07-16-2018, 08:47 PM | #9 |
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Re: radiator paint
If white was the color manufactures would have been doing it 100 years ago.
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07-17-2018, 05:49 AM | #10 | |
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Re: radiator paint
Quote:
Eastwood Paint, they make a special flat black radiator paint. Enjoy, |
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07-17-2018, 06:57 AM | #11 |
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Re: radiator paint
A Guys' Model A radiator had apparently been painted, from a HIGH angle. When he laid it down, it displayed a WHITE, number 7, stenciled from below! "Wonder" what "story" it could tell???
Bill W.
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07-17-2018, 07:02 PM | #12 | |
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Re: radiator paint
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