PNWevoIX

So i recently had my calipers powdercoated, and noticed they got some over
spray where the brake piston goes.. I am worried the piston won't have enough clearance to properly function... I even waited for 3 weeks to get these back and this is what i get... What do you guys think??? Any help is apprecaited, thanks...

MinusPrevious

iTrader: (3)

Is that paint on the rubber O-ring seal? If so, need to find a delicate way to remove that paint or just replace that seal

Have not dealt w/that issue, but maybe the other guys can offer more advice

V.8MR

iTrader: (6)

test fit piston/seal. I'd deff do my best to clean that without scratching though. Hard to judge how thick it is.

asu11

iTrader: (7)

Were the pistons removed for powder coating? Doesn't seem like it...

LetsGetThisDone

iTrader: (1)

Wow...Who is responsible for that sloppy work?

You can try some aircraft stripper. I wouldn't use any kind of a tool to "scrape" it off. You'll just scratch the bore and ruin the caliper.

PNWevoIX

Yes the piston and seals were removed before they were powder coated...
The place that powder coated them didn't tape them off very well and got over spray on them... Its enough powder coat to have a nice little lip so i know the piston is going to rub against it pretty badly.. I am going to call them tomorrow and see if they can do anything about it... maybe sandblast it off?? Idk i just want to drive my damn car and this is holding me back...

David Brown

Curious to see how these hold up to long term heat. Do you track your car?

asu11

iTrader: (7)

If they removed the piston then why is there residual powdercoat on it?

PNWevoIX

there is no piston in the caliper shown, the seals and piston/dustboot was removed.

LetsGetThisDone

iTrader: (1)

You need to clean that stuff of the bore.

asu11

iTrader: (7)

Oops now I see.

white_turbo

iTrader: (2)

If there is a thin coat of powdercoat in the cylinder that you can feel with your hand, your piston won't even go in, so yes, you need to strip those off.

The powdercoat is so tough that even if you piston goes in, I wouldn't want it to grind on the paint. My wheel hub was powdercoated, and not amount of scraping by handtools would take the paint off.

xiMR

I would take it back brakes are something not to play with as you know

Jonno99

Don't just take it back and give to them, some fool will just try and scrape it off with a Stanley, ring thing and ask what's the process to get it off then take it down, they might even recommend a method you can do yourself, you don't want your bore screwed any more

GTijoejoe

iTrader: (25)

You're going to want to get that out of there because of piston drag.
The most important part of the bore is the seal and behind.
The piston doesn't actually come in contact with the front side of the bore, when you load a caliper the wear area is usually the backside of the bore from the piston tilting.

Personally, if it were me, I'd first ask the paint place about a chemical to remove.
If that failed, I would lightly sand by hand.