New Porsche OEM oil lines - black How to get them Brass looking?

[rxtrom]

UPDATE:

I took the wise advice of the aircraft paint stripper, some steel wool and clear coat. Worked great and was very easy!!










Good afternoon.

I just purchased a set of supply and return hard oil lines that are Porsche OEM. They arrived black. I thought the normal color is bare brass, but I guess not. How do some cars end up with the natural brass color?

Does the paint wear off after a while or do people DIY sand the paint off?

Thanks!

[KTL]

Yep people rub off the black coating on the old lines (red scotchbrite pad works great) and it reveals the brass color.

[Uwon]

The brass shine will last even longer with some clear coat, but eventually the gets dull with all the road rash.



Cheers,
Johan

[QueWhy]

Originally Posted by Uwon

The brass shine will last even longer with some clear coat, but eventually the gets dull with all the road rash.



Cheers,
Johan

I thought about doing that but worried the clear would compromise the lines ability to dissipate heat.

[KTL]

Doesn't the original black coating reduce the heat transfer similar to what the clear might do? If you want to clear them, I say go for it. They get PLENTY hot and i'm certain the clear isn't going to be a major impact on heat radiation. Plus, if you're going to leave the lower rocker panels removed? You're removing a shield that has been "insulating" them. Take off the rocker panels and it exposes them to the rapidly moving air that will cool them much more

[Jonny042]

Originally Posted by KTL

Doesn't the original black coating reduce the heat transfer similar to what the clear might do? If you want to clear them, I say go for it. They get PLENTY hot and i'm certain the clear isn't going to be a major impact on heat radiation. Plus, if you're going to leave the lower rocker panels removed? You're removing a shield that has been "insulating" them. Take off the rocker panels and it exposes them to the rapidly moving air that will cool them much more

Actually painting something flat black increases it's ability to shed heat by a significant amount. Heat reflects off the internal surface if that makes sense, so the shinier it is, the more it contains heat.

[KTL]

So this is where i've always been confused. Just the color can't be the controlling factor, is it? Doesn't the material itself have more effect than just the color? Like say a specialized coating like Swain's BBE

BBE Heat Emitting Coating | Swain Tech Coatings | Industrial Coatings | High Performance Racing Coatings

Then why is their White Lightning white? White Lightning Exhaust Coatings | Swain Tech Coatings | Industrial Coatings | High Performance Racing Coatings That's actually a trick question because they don't want their headers to emit heat. They want them to be insulated and contain the heat.

Here's an interesting take on it from aircraft engine bay perspective, for whatever it's worth

https://www.avweb.com/news/maint/182886-1.html

[QueWhy]

Originally Posted by Jonny042

Actually painting something flat black increases it's ability to shed heat by a significant amount. Heat reflects off the internal surface if that makes sense, so the shinier it is, the more it contains heat.

That’s what I was told as well. I went with some flat black high temp BBQ paint.

I don’t know what the difference in real world cooling between, gloss, flat, or bare metal is but I know I can use all the help I can get cooling the oil so I opted for flat black, plus polishing up the lines was becoming a chore and I wanted to get them repaired and move on the SSI install.

[Jonny042]

I believe it has to do with the actual wavelength of heat energy, in the same way that certain colors absorb (or is that reflect?) certain wavelengths of color so they look a certain way, somehow black more readily emits or absorbs heat energy.

So yes silver and white most likely are the opposite, and in the case of exhausts you want to heat to stay where it is I think.

Originally Posted by KTL

So this is where i've always been confused. Just the color can't be the controlling factor, is it? Doesn't the material itself have more effect than just the color? Like say a specialized coating like Swain's BBE

BBE Heat Emitting Coating | Swain Tech Coatings | Industrial Coatings | High Performance Racing Coatings

Then why is their White Lightning white? White Lightning Exhaust Coatings | Swain Tech Coatings | Industrial Coatings | High Performance Racing Coatings That's actually a trick question because they don't want their headers to emit heat. They want them to be insulated and contain the heat.

Here's an interesting take on it from aircraft engine bay perspective, for whatever it's worth

https://www.avweb.com/news/maint/182886-1.html

[Uwon]

To the OP, paint or no paint, I suggest that you are not going to notice the difference, particularly if you have a fan for the front oil oooler.
Johan

[911pcars]

Originally Posted by Uwon

To the OP, paint or no paint, I suggest that you are not going to notice the difference, particularly if you have a fan for the front oil oooler.
Johan

Yes

[rxtrom]

Thanks everyone, I took some red scotch brite to the oil lines and it is definitely sanding the paint and dulling the finish, but I have yet to see brass. I probably sanded the same spot for 5 minutes with no real results. My impression was that it would be easier seeing how many people do it and the size of the job.
Should I be using something else?

[Helix8]

Try using Goo Gone with your scotch brite

[QueWhy]

Originally Posted by rxtrom

Thanks everyone, I took some red scotch brite to the oil lines and it is definitely sanding the paint and dulling the finish, but I have yet to see brass. I probably sanded the same spot for 5 minutes with no real results. My impression was that it would be easier seeing how many people do it and the size of the job.
Should I be using something else?

I used a brass brush in a drill. It took forever and was quite annoying, I had some paint and hundreds of thousands of miles of grime to contend with too.

[gtc]

I did a rough calculation and figured that a pair of black oil lines (two lines, 8 feet long, 1" OD) would radiate about 100 watts more if they were painted black vs bare oxidized brass. That might be enough to notice a difference in cabin temps if they were routed inside the car, but it probably isn't enough for you to notice a reduction in the engine oil temp.

That said, every bit helps, so I'll be painting my oil lines flat black and reinstalling the cool collar i have on my shelf.

[SalParadise]

Porsche does it to prevent corrosion. Brass corrodes - bigtime. Ever see a brass musical instrument that just corrodes from spit? Or a garden hose fitting?

I think anyone is insane for removing this coating. Plus it's hard to get some paints to adhere to brass. I really have no idea why someone would want to strip them - it is not functional at all.

The place on a 911 where these lines reside are wet all the time in rain or even when the road is a little wet.

[rxtrom]

Honestly, I just like the look of the brass. However if it is going to take forever like an above poster mentioned, I will just order the brass elephant racing lines.

[Uwon]

Paint remover, then finish off with wet sandpaper. Only way!
Then nice clear coat. It will be worth it.
Johan

[75 911s]

Brass is Texas International Truck Stop!

[safe]

Originally Posted by Jonny042

Actually painting something flat black increases it's ability to shed heat by a significant amount.

Ye, IF its black in the infra red spectrum...