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Old 04-15-2012, 12:24 PM   #1
Magus2727
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rebuild of brake calipers?

I have the pistons removed and all cleaned up and about ready to install the new ring and put the pistons back in. But... one of the pistons has pitting on the exterior side wall due to rust. I have never had a problem with brake fluid leaking. My guess is that the dust boot was not well sealed in this small section and let a little bit of water which "pooled" at the piston/seal area. I will try to get pictures posted of it in a few hours. The old seal was hard and had rust scaling on it in this section. My concerned would be with a new fresh seal I might have leaks. Can you get just new pistons if this proves to be an issue? Or will I just need to pick up a whole new caliper?

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Old 04-16-2012, 05:44 PM   #2
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bump.... are the pistons the same between the SVT and the "regular" focus? The junk yard I am sure will have more regular focus calipers for me to plunder than those with SVT brakes.

a write up in Popular Mechanics on brake rebuilds says " Minor surface blemishes can be polished out with wet 2000-grit sandpaper, but any pits in the metal means replacement will be necessary."
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Old 04-17-2012, 11:58 AM   #3
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Are the SVT caliper pistons the same size as the 2005+ caliper piston? or any other year of piston?

Ford dealerships are not able to locate the SVT piston (discontinued) and would like to know if any one has available or can measure the piston on their 2005-2007 (not sure if the brakes are the same past 2007...) so I can then see if it would be a swap fit.

Via Rock auto it looks like the brakes on the 2000 model (ZTS, ZX3, and LE) are also a 54mm bore. And are the same P/N for the Dorman part ( D670037 ). Can one assume that the length of the piston would stay the same between all versions of the brakes if the bore was the same?

Thanks for any help any one can offer!!!!
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Old 09-20-2013, 11:32 PM   #4
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Looking to rebuild an svt front caliper did you ever find out your answer ?
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Old 09-21-2013, 09:12 AM   #5
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I did get an answer back from one company that the customer service person did not know and even there manager about getting the pistons them selves. Another company never returned the call. A machine shop said they could but the cost was going to be higher. I do not know if the SVT piston is the same size or not. it likely is not, but if it was I could pull the piston from the junk yard... I do know that a machine shop could machine new ones, however the cost is likely to be more than the $45 it cost. You can get A1-CARDONE's for about $50. I find it odd that it costs less with the bracket than with out... but the $60 core charge makes it 2x more till you return the old ones. That's my plan.
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Old 09-21-2013, 07:17 PM   #6
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The svt calipers have a bigger piston then the '05 calipers. When I upgraded to the svt front brakes yrs ago.
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Old 09-23-2013, 11:08 PM   #7
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Makes sense that they are bigger. Better pair a larger piston diameter and larger rotor than just one... the new ford ecco boost commercials are coming in mind. Better to have both over or.

Would have been nice though if I could have easy grabbed the ones from a junk yard. Would have saved a little bit of cash and would not have to worry about the core returns.

I will measure the SVT piston diameter tomorrow but can anyone put up the measurement of the stock one?
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Old 09-24-2013, 08:30 AM   #8
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I bought a set of rebuild kit for the svt front and the rear from rockauto hopefully its the right parts. Couldnt find anything local.
On the site the front caliper repair kit said svt and the other models of the 00-04 year so the boots are the same maybe the piston is too ?
Whenever I go back to the junk yard ill take a stock caliper and check out the piston.
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Old 04-13-2014, 03:28 PM   #9
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I know this is a dead thread but you guys ever figure out where to get the piston?
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Old 04-13-2014, 07:35 PM   #10
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Nope. Called around to a lot of places and nothing. Ended up buying rebuil ones just to tare the pistons out and send them back with the crap pistons.

My caliper bodyes were all Ford and in good condition, better in fact then the rebuilds they sent me.
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