I went ahead and split the callipers on be vehicle to fully disassemble and powder coat them - in retrospect it turns out that I shouldn't have taken them apart, but whats done is done at this point.

What torque do the 4 bolts connecting the two callipers need to be tightened too - I'm assuming the fronts will be a bit higher than the rears.

Any help would be great - obviously tons of thread lock will be used.

 

Its hard to find info, but according to this link the bolts are ruined.

https://my350z.com/forum/brakes-and-...ng-to-hub.html

If you do decide to re-use them, there is a lot of discrepancy about how tight they're supposed to be. There are tons of videos on YouTube of people separating the halves for paint or PC and then re-tightening them but none of them mention how tight they put the bolts. Here are some links to a Porsche forum where it's anywhere from 55-70 ft lbs.

https://rennlist.com/forums/993-foru...-settings.html

https://rennlist.com/forums/964-foru...ml#post2334852

 

When I did my motorcycle ones recently it was also in that ballpark range of torque too.

 

Make sure to clean out the threads REALLY well before reassembling. Otherwise you can get false readings on the torque. Also, and I didn't read the above referenced specification docs, but you need to find out if they are meant to be torqued "wet" or dry.

 

I ended up giving them a good clean, loctite and then torqued the rear left caliper bolts to 130 and they snapped. I ended up getting new rear hardware and then torqued them to 145 without issue. The fronts I think I did to 155/160. I've driven on the brakes now for over a month with some aggressive driving and no issues at all!

 

Glad it's working, but 130 ft-lbs!? That seems way too high - the two much larger bolts that hold the caliper to knuckle are only ~80 ft-lbs.

Not sure what size the bolts are, but here is the FSM torque page:

 

Just Curious where did you get the replacement hardware to put the two halves back together? I bought a set of Brembo calipers that were split for sand blasting and the guy lost the bolts that hold the calipers together. SO now I am on this missing to find these bolts. I wish I knew it was going to be this difficult before I bought these.