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Old 21-08-2015, 09:22 PM
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Default Stripping and rebuilding 4 pots

Has anyone stripped and rebuilt their Subaru 4 pots? I bought a set of "refurbished" 4 pots with new stainless pistons and new seals early last year and now some of the pistons are a bit sticky again, I assume the bores weren't cleaned properly during the rebuild so need to strip and clean them up, I want to re-use the stainless pistons so don't want to damage them getting them out, what's the best way of getting the sticky ones out? Also is it just a case of new o rings or should I get a set of seals as well?

Shane
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Old 23-08-2015, 10:32 AM
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Have a l@@k here:http://forums.nasioc.com/forums/showthread.php?t=881881.SJ.
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Old 23-08-2015, 10:44 AM
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as with lots of things there is a load of 'smoke & mirrors' info to be polite surrounding "stainless pistons"......

the main issue is the cast iron body corrodes and 'grabs' the pistons, std factory hrome plated are perfectly fine IF the bodies are in good condition
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Old 25-08-2015, 09:10 AM
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Cheers guys.

The stainless pistons appealed to me as the chrome ones that were in my original calipers were just big lumps of rust.

Can you supply the inner seals Alyn, it's service time anyway so can order everything in one go, interested in your recommendations for front pads as well.

Shane
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Old 25-08-2015, 10:37 AM
asperformance asperformance is offline
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yes carry most seals, etc. in stock................

the reason the OE pistons corrode is because of the damage caused by the body corrosion, not the other way around - only difference with s/steel versions is they end up unuseable with chunks/damage to them
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Old 29-12-2015, 12:57 PM
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Finally got round to this, was only one piston that was sticking on the off side, all others were free and clean so clamped those in place and used the pedal to pump out the problem one, was a bit dirty so cleaned up the Piston, bore and seal seat with a mixture of wet and dry and a metal scribe to get the crud out of the groove. Reassembled with new inner seal, dust seal and circlip now all seems good again but guess only time will tell.

As a tip, I found a bolt with a few old copper washers through the banjo bolt helped seal of the brake line seeing as you can't clamp braided lines.
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