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Questions On Powdercoating

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Old Oct 21, 2002 | 11:25 PM
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Questions On Powdercoating

I'm going to get my valve cover powdercoated white, with the letters painted red (like they are now.) I'm wondering, could I get the heat shield done white as well? Would the powdercoating hold up under those temperatures? I know it's baked on to begin with, but will repeated heat cycles weaken it in any way?
Old Oct 22, 2002 | 07:18 AM
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Re: Questions On Powdercoating

Originally posted by Maxx Mazda
I'm going to get my valve cover powdercoated white, with the letters painted red (like they are now.) I'm wondering, could I get the heat shield done white as well? Would the powdercoating hold up under those temperatures? I know it's baked on to begin with, but will repeated heat cycles weaken it in any way?
A good powder coat should hold up no problem. Just don't use white as it may yellow over time. I have had engine parts powder coated on my bike and had no problems at all.
Stocker.
Old Oct 22, 2002 | 09:42 AM
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Ok, maybe I'll go with red on the heat shield, and white on the valve cover. Will the white naturally yellow, or will it only yellow if its under extreme heat?
Old Oct 22, 2002 | 09:47 AM
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Originally posted by Maxx Mazda
Ok, maybe I'll go with red on the heat shield, and white on the valve cover. Will the white naturally yellow, or will it only yellow if its under extreme heat?
Keep in mind that powder coating isn't cheap, and it is rather thick. Make sure that you take it to someone who's done automotive stuff, especially a valve cover. You'd want to make sure it is masked off properly. I would think that for the valve cover and heat shield you'd be looking at around 100-200 dollars.

For something like a valve cover I'd paint it with decent quality engine paint.

Jay
Old Oct 22, 2002 | 04:44 PM
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100-200 dollars that is really expensive for US prices
I can get a set of wheels done for cheaper then that 2 VW bus bumpers and various parts.


You can get a higher temp coating like ceramic powder done for the high heat peices.
Old Oct 22, 2002 | 04:46 PM
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Originally posted by kosmicride
100-200 dollars that is really expensive for US prices
I can get a set of wheels done for cheaper then that 2 VW bus bumpers and various parts.


You can get a higher temp coating like ceramic powder done for the high heat peices.
We are both from Canada...so I was talking about Canadian funds.

Jay
Old Oct 22, 2002 | 04:52 PM
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I have my engine powdercoated already, (valve cover and heat sheild)

I don't know if I would recommend getting the heat shield done in white. There are 4 bolts that hold it down. The bolt that is near the bottom seems to conduct the MOST heat, and therefore is causing the sheild to turn brown. I've attached a picture below. If you look closely enough you can see its turning brown slightly. Its gotten a little worse since I've taken that picture.



I've asked the guy who did it, and said the heat that is being generated and conducted is just way to hot so its moreso burning the powdercoat which is possible at extreme HIGH heats. The valve cover on the otherhand has no problems at all, neither does the top portion of the heat shield. If anything I should of got it done Black.

Last edited by gujustud; Oct 22, 2002 at 04:55 PM.
Old Oct 22, 2002 | 05:05 PM
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Just a thought, but wouldn't a white colored heat shield help radiate the heat away a little better than a red one, since it's a light color? (Back to Jr. High Science.) Or does that not work at all?
Old Oct 22, 2002 | 05:50 PM
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Check to see if you can get the heat sheild ceramic coated instead of powder coated with the same color the ceramic coating will withstand the heat better
Old Oct 29, 2002 | 01:21 PM
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Originally posted by Maxx Mazda
Just a thought, but wouldn't a white colored heat shield help radiate the heat away a little better than a red one, since it's a light color? (Back to Jr. High Science.) Or does that not work at all?
That does when it comes to sunlight, as white reflects heat that is transmitted via light. The heat in this sense however is conducted, and is not being transmitted via light, therefore color wouldn't matter.

Originally posted by kosmicride
Check to see if you can get the heat sheild ceramic coated instead of powder coated with the same color the ceramic coating will withstand the heat better
Yeah, a friend mentioned that to me. I may look into getting a new heat sheild in the spring, and may get that red or possibly black, which I think will really look the best.
Old Oct 29, 2002 | 02:11 PM
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Originally posted by Maxx Mazda
Just a thought, but wouldn't a white colored heat shield help radiate the heat away a little better than a red one, since it's a light color? (Back to Jr. High Science.) Or does that not work at all?
darker colors are better at radiating heat than lighter colors are. if you were only concerned with the radiation of the heat absorbed by the heat shield, flat black would be the best.
Old Oct 29, 2002 | 02:18 PM
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Originally posted by TheMAN
Ahhh, but isn't the exhaust manifold's heat shield purpose is to shield heat from the rest of the engine so that everything else stays cooler/not get heat soaked while the exhaust system blows the heat out?
dude, are you going to attack every thing i post from now on?

i was only stating that black objects are better at heat radiation than white ones are, regardless of what the heat shield's main function in life is.
Old Oct 31, 2002 | 05:16 PM
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i painted mine myself with blue high temp paint, and mine has had no problems... i used paint rated up to 500+ degrees.

see it here....
Old Oct 31, 2002 | 11:57 PM
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Originally posted by blackp5sdp
i painted mine myself with blue high temp paint, and mine has had no problems... i used paint rated up to 500+ degrees.

see it here....
But your heat shield is discolored. I'm hoping the ceramic coating won't discolor as much as yours did. I want a lasting finish if I'm going to spend the $$$.
Old Nov 1, 2002 | 12:04 AM
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i don't know where your planning on getting you work done, but i would suggest calgary powder coating... i went in and asked them,and the quoted me 200 for valve cover, heat shield, strut bar and intake with a 3 day work period

good luck



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