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Old 04-28-2009, 02:20 AM   #1
speed_addict
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Default Broke a caliper bolt... what next?

Hey all,
Looking for some insight... while having to replace the wheel studs on the driver side of my 04 STi, a caliper bolt was snapped in action as it is obvious the prev owner never put anti-seize on the bolt after installing new rotors. The thread wouldn't clean so the top hole had to be retapped with a slightly larger bolt taking the place of the old one.

Still having a warranty and experiences "clunk" issues, I took the car to the dealer. After them declining to fix the (now) obviously blown suspension, they blamed the caliper for the problem saying it was "moving" and that brembos cannot be retapped. I undersand that brembos are indeed aluminum but what the hell else is one suppose to do when a bolt breaks off? Buy a new set of calipers? Really?

The bolt gets super tight and I can't feel any real movement when braking. Also, I would think that with the bottom bolt going back in solid, play in the caliper would be impossible. Anyone have a take on this? Just wondering if new calipers should really be put on my "to buy next" list.

-Ashlee
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Old 04-28-2009, 07:54 AM   #2
copterdr
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Don't use anti seize on the bolts. I did and the temp differential from steel bolt and alum brake caused the bolt to back out then seize. I ended up buying a new Bremo. I think I could of got by by Helicoiling the brake instead but I needed to get the car back up an running.
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Old 04-28-2009, 08:14 AM   #3
Turn in Concepts
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Quote:
Originally Posted by copterdr View Post
Don't use anti seize on the bolts. I did and the temp differential from steel bolt and alum brake caused the bolt to back out then seize. I ended up buying a new Bremo. I think I could of got by by Helicoiling the brake instead but I needed to get the car back up an running.
You didn't have the bolt torqued down enough. We always use anti-seize on those bolts and have never had an issue with them backing out.

OP, easiest way to fix this is to get a helicoil and put it in the caliper. If you can use a stock bolt, that is best, but since you have already drilled out the hole you may not be able to. We have helicoils in all of our Brembos as the aluminum always strips out after a while and have never had a problem with them.

Tony
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Old 04-28-2009, 07:04 PM   #4
WeldingHank
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Quote:
Originally Posted by Turn in Concepts View Post
You didn't have the bolt torqued down enough. We always use anti-seize on those bolts and have never had an issue with them backing out.

OP, easiest way to fix this is to get a helicoil and put it in the caliper. If you can use a stock bolt, that is best, but since you have already drilled out the hole you may not be able to. We have helicoils in all of our Brembos as the aluminum always strips out after a while and have never had a problem with them.

Tony
Heli-coil for the win.

I watched a program once about heli-coils. They were developed for the airplane industry and are designed to last longer and be stronger than the material they are replacing.
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Old 04-28-2009, 09:21 PM   #5
prometheum
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Quote:
Originally Posted by copterdr View Post
Don't use anti seize on the bolts. I did and the temp differential from steel bolt and alum brake caused the bolt to back out then seize. I ended up buying a new Bremo. I think I could of got by by Helicoiling the brake instead but I needed to get the car back up an running.
depends on what type of antiseize you use; if its graphite based and you're using it on aluminum it should be called proseize
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Old 04-28-2009, 09:41 PM   #6
Uncle Scotty
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Quote:
Originally Posted by prometheum View Post
depends on what type of antiseize you use; if its graphite based and you're using it on aluminum it should be called proseize
ding
ding

and

ding
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Old 06-08-2009, 04:58 PM   #7
speed_addict
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Thanks guys! (just got back from vacation lol) I'm gonna look into this further so I can get the beast fixed.
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