Powder Coating overspray: help needed
 

Got parts back from powdercoating and there was some overspray on gasket surfaces and a couple gasket areas that they didn't mask off at all.

I'm thinking sand this down best possible and use some RTV sealant on both sides of the gaskets?
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I didn't get pics of it, but I have heavier overspray on the throttlebody side of the UIM. IIRC the plastic modling between the UIM and TB doesn't use any kid of sealant and the tiny holes for vacuum lines will make using RTV tricky.

They didn't cover the turbo oil outlet port or oil cooler port (inlet??) at all:

Can I simply gasket the surface?
http://a1.sphotos.ak.fbcdn.net/hphot..._6965876_n.jpg

Oil cooler I'll have to clean up some. To make sure it seals, can I simply put some RTV on it and tighten down the hose adapter?
http://a7.sphotos.ak.fbcdn.net/hphot..._3254965_n.jpg

They also missed the BAC area on the UIM. I'm thinking I'll be ok using some RTV

You can try using a razor blade or sanding will take it off.As for the threaded holes that didn't get plugged you will want to run a tap or thread chaser in them.

Or send it back to them and tell them to not suck and fix it...

What Robert said.

I would take them back and have them strip and re-coat it. Powder coat is a major PITA to strip, and it is their mistake......unless you didn't specify the importance of where it needed to be masked.

Taking it back to them isn't an option at this point. It took them 2 months to finish the work. Unfortunately it sat in the owner's office while he was out of town. I imagine what happened was the guys doing the work forgot some of the instructions I left with them. On the plus side they gave me a huge discount on the price.

I want to assemble the engine this weekend...pending some bearings being pressed correctly. I'd rather clean it up myself than have the assembly delayed.

The turbo outlet passage is real clean. I'd think some RTV and a gasket will seal it. My concern is whether the oil will eat away at the powdercoating. Over time will it end up leaking?

Obviously the oil cooler passage can't stay the way it is.

The threads, studs, holes, etc. have cleaned up pretty easily so far. So far I've been able to run a bolt down them without stripping anything and use a wire brush to clean up the debris in the threads.

You have terrible luck with shops.

use the razor blade trick to clean it down to bare metal

Tell me about it!! I guess that's the product of living a pretty rural midwest. I've learned to do as much work as possible, not only out of personal pride, but for sheer survival!!

clean up the turbo outlet port also?

You might as well... Even if you cleaned a 1/2" outward of the circle in the middle, you'd have plenty of gasket material... dremel sanding drum??

*** That particular area doesn't see any pressure, so the gasket material doesn't have to be so "Robust". A stock gasket with black RTV would seal no prob.***

Clean to the metal under any gasket ,no gouges, light sanding proper gaskets and sealer . No power coat .Ask me how I know .Take no chances do I correctly the first time,My customers know that is what they will get .

Check the seals and operation of your TB.... chances are it was ruined by the heat and won't hold pressure anymore.

I didn't have the TB powder coated, but there is some overspray on the UIM to TB studs.