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Old 12-02-2012, 12:10 AM   #1
avikm289
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Default 2 piston brembo question

My calipers were split to be powder coated, and I got them back still split. I hear the torque specs for the fronts are 65 ft/lb for the 4 splitting bolts. What is the torque for the rear Allen bolts? There are 4 bolts on the rear 2 piston that's are hex type. There sti calipers btw
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Old 12-02-2012, 01:15 AM   #2
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Originally Posted by avikm289 View Post
My calipers were split to be powder coated, and I got them back still split. I hear the torque specs for the fronts are 65 ft/lb for the 4 splitting bolts. What is the torque for the rear Allen bolts? There are 4 bolts on the rear 2 piston that's are hex type. There sti calipers btw
Why did you split them to be powdercoated? It is very easy to permanently damage them once split...

Last edited by sc00by4life; 12-02-2012 at 04:05 PM.
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Old 12-02-2012, 06:08 AM   #3
avikm289
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The guy I went to split them, and I read up on the great debate why/why not they should be split or not
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Old 12-02-2012, 08:26 AM   #4
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The guy I went to split them, and I read up on the great debate why/why not they should be split or not
I would probably never go there again. There is soooo much that can go wrong by doing what he did.....make 100% sure they actually hold pressure once you get them on the car.
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Old 12-02-2012, 03:29 PM   #5
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They are actually 85ftlbs for both front and rear. Why did you split them to be powdercoated? It is very easy to permanently damage them once split...
Where did you get that torque spec? All the research I've done has lead to "no published torque spec". Furthermore, I highly doubt the torque spec on a M8 bolt into aluminum is 85ft/lbs.

All the sets I've reassembled after powder coat I've just tightened them by feel. If you want a torque spec, look up bolt charts, educate yourself based on the hardware specs and decide for yourself.

I've split dozens of sets. As long as you're not stupid there isn't much that will go wrong. Replace the cross seal.
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Old 12-02-2012, 04:05 PM   #6
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Where did you get that torque spec? All the research I've done has lead to "no published torque spec". Furthermore, I highly doubt the torque spec on a M8 bolt into aluminum is 85ft/lbs.
I think i confused the bracket torque with the halves.

OP does seem correct though, according to the porsche forums those guys are saying 62-65ft lbs.

i edited my original post.
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Old 12-02-2012, 04:11 PM   #7
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85 ft/lbs is too high for the M8 bolt into the aluminum bracket in the rear. The FRONT M10 caliper bracket bolt is 85 ft/lbs.
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Old 12-02-2012, 04:24 PM   #8
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yes, sorry front.

rears are 24ftlbs?
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Old 12-02-2012, 04:27 PM   #9
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Here's food for thought for the caliper half bolts that I just realized:

The caliper half bolts are the same size and thread, threading into the same material as the bracket bolt. Make what you will of that information
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Old 12-03-2012, 04:20 PM   #10
avikm289
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reassembled them, tourqued as best i can (allen heads stripped a lil so i stopped) and blead them and its good thank god
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