Powdercoating and gasket surfaces... ugg
Powdercoating and gasket surfaces... ugg So i took my timing cover, rear cover, intake, oil pan and valley cover and had them powdercoated at a local powdercoater. When he powder coated my covers, he coated both sides including the gasket mating surface, along with my oil pan pan rail, and the gasket surface of the valley cover. My injector holes in my aluminum intake are also powder coated. is this going to cause a sealing issue? the powdercoat is even distributed and is smooth, but i dont wanna take a chance on it cracking or whatever else may happen. should i get it off or leave it be? Any tips if i have to remove it from the areas... ?
Thanks
Thanks
Really? Powder coating in the intake whole for the injector? The injector might not fit. And what if it comes apart and blocks an injector? Don't risk it. Grind that **** off the gasket surface also.
This is a tough one because you don't want to get there and scrap it away. You might scratch the matting surface for the injector o ring. Is there any chemical that will disolve powder coating?
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TECH Regular
Joined: Mar 2008
Posts: 439
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I decided to work on a few pieces that were "over coated" and a soft wire wheel took the PC right off for me. Also, brake cleaner dissolved that powder coat like nobodys business. I put some brake cleaner on a rag or Q-tip and it took it right off.
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Teching In
Joined: Dec 2012
Posts: 5
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From: Fort Worth, TX
This is unfortunate, as a powder coating technician, i know to never do any of those things, as should anyone reputable. If at all possible take it back and ask him about what he's willing to do to fix the situation. anything that has the ability to abrasively remove the powder coat would also mar the gasket surface and more than likely be unusable, some powders are more chemically resistant to certain solvents. being that the parts are aluminum you can not have them burned off. brake cleaner may work, but it still takes a lot of elbow grease, and i mean a lot, very time consuming. You NEED to see what he's willing to do to fix the issue. it would be virtually impossible to remove powder from an injector hole via chemical means, ALSO, powder does crack, it is decently flexible, but torque'd between two pieces + heat, probably isn't going to end good.
I ran into this issue a couple months ago on some pieces I had coated. i found that brake cleaner softened it up enough to scrape off with a razor blade. It was a PITA. It's a shame when you pay someone top dollar to coat parts and they fail to use their brain when masking stuff off.
i appreciate the help guys. my main concern is the injector bores on the intake. even if i remove the powdercoat, the surface of thru aluminum is rough, almost feels like a grinding stone. i dont know if the o-ring will seal correctly on that kind of surface. along with the gasket surfaces of the covers. i can probably remove the powdercoat, but then im left with a rough aluminum surface for the gasket. im beyond pissed. ill try to get some pictures today l.
Joined: Jun 2011
Posts: 314
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From: Land of the Mormon's although I'm not one of them
I would be all over your powder coater like a spider monkey asking what he's going to do about the parts he's essentially ruined for you; if he did the same to all the covers, you're never going to get them to seal properly.
All those sealing surfaces need to be masked before the part gets blasted, and then masked again after cleaning/de-gassing before coating.
Sounds like you got bent over by this incompetent shop.
All those sealing surfaces need to be masked before the part gets blasted, and then masked again after cleaning/de-gassing before coating.
Sounds like you got bent over by this incompetent shop.
They will say the same thing. Don't put your whole engine together for the 1% chance that nothing leaks. Its going to break down and you will have to take it all apart Again
Your powder guy must be on some powder or something dude. That is retarded. The only thing I can say you might try is heating it back up, that **** starts to flow at 400-450 I believe. Easier said that done though.
sorry guys, got busy yesterday. i spoke with AES and they said the same thing. they weren't really concerned with the aluminum surface as much as the PC on the gasket surface. i ended up taking back my rear and front cover, valley cover and oil pan to be reblasted. i go today to approve the masking stage before he PC it again. i got my intake yesterday. the PC looks good but he got PC in the runners dso im not letting him touch the intake again. im goint to take it to another PCer. i did try some aircraft paint remover that comes in a quart on the injector holes and it made quick work of the PC but it made the area around the hole look like ****. i was as careful as possible but that **** is hard to manage. imma pay someone else to do my intake. hopefully my covers turn out. if not im getting a refund
