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Old 06-09-2015, 09:52 AM   #1
Kahn23
Scooby Newbie
 
Member#: 161569
Join Date: Oct 2007
Chapter/Region: Tri-State
Location: NEPA
Vehicle:
2006 WRX Stage 2
Crystal Grey Metallic

Default To split or Not to split my 4 pot calipers

Hello All.

I will be rebuilding/repainting my original 2006 WRX 4 pot calipers. I have been trolling the net and this site and have seen people who have split these for cleaning and all new seals and people who are totally against it.

A little background the set I am going to rebuild has been off my car for over a year and sitting in my shed. There is still some red paint on most of them, but they are cruddy/rusted and I'm worried that the rubber o-rings inside the caliper halves (not the ones in the bores) are dried up from sitting for so long with nothing in them.

I am going to have the outside sand blasted to get them back to new(er) shape so I can repaint them with G2 caliper paint. I will be getting the rebuild kits, new bleeder valves, G2 caliper paint and new hi-temp stickers. (and new pistons if necessary)

Any opinions on split or not split and what you think the condition of the inner o-rings might be from sitting dry?? Would it almost be a must to split them because of that?

If I do split them, is there any truth to the bolts being torque to yield and there doesn't seem to be a consensus on the torque specs when putting them back together. 40-50 is where most people that have done it seem to be happy.

Thanks for your time.
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Old 06-09-2015, 12:03 PM   #2
mitch808
Scooby Specialist
 
Member#: 10228
Join Date: Sep 2001
Vehicle:
2002 Subaru WRX

Default

It doesn't hurt to split and inspect them. If they appear cracked or dry, replace them. Measurements have been posted by myself and others, and there are now kits available from centric, KNS Brakes, etc to buy replacements.

I've been 6+yrs on calipers I split, that I did torque to around 40-60lbs before I lost leverage and the caliper slipped out of my grasp. I thought, "well, that's good enough for me." and it has been.

As for pistons, some scotchbrite was all i needed, or some very fine steel wool. Luckily I didn't need new ones.
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Old 06-09-2015, 05:57 PM   #3
Kahn23
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Member#: 161569
Join Date: Oct 2007
Chapter/Region: Tri-State
Location: NEPA
Vehicle:
2006 WRX Stage 2
Crystal Grey Metallic

Default

Thanks for the reply. Makes my decision easier
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