Splitting Calipers - Ate Oring Source - Alfa Romeo Bulletin Board & Forums
 
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post #1 of 13 (permalink) Old 09-18-2016, 05:52 PM Thread Starter
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Splitting Calipers - Ate Oring Source

Cleaning up front calipers and want full access so I am opting to split (Yes, I know, I know) calipers. Does anyone have a source for the square cut oring that seals the caliper halves? Thanks!
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post #2 of 13 (permalink) Old 09-18-2016, 06:14 PM
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Do you know he size? Try the " O Ring Store"

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post #3 of 13 (permalink) Old 09-18-2016, 07:32 PM
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I thought they were reusable

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post #4 of 13 (permalink) Old 09-18-2016, 07:50 PM Thread Starter
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They probably are reusable, would be nice to have them on hand in the event they are ancient - any sources? Read up quite a bit, not just any o-ring will do, the rubber needs to be resistant to brake fluid and I understand they are square cut too -
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post #5 of 13 (permalink) Old 09-18-2016, 08:00 PM
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They probably are reusable, would be nice to have them on hand in the event they are ancient - any sources? Read up quite a bit, not just any o-ring will do, the rubber needs to be resistant to brake fluid and I understand they are square cut too -
I ordered Catalog No. 9452K169 from McMaster-Carr. $1.97 for a pack of 100. They are not square cut, but I did my front calipers a year ago and have no leaks.

Rich

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post #6 of 13 (permalink) Old 09-18-2016, 08:17 PM
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PMB has them.


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post #7 of 13 (permalink) Old 09-18-2016, 09:28 PM
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Classic Alfa. In fact, I have a set I'd sell.

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Past Alfas...
59 102 Touring (first Alfa $500 running)
65 Sprint GT (2nd Alfa, $500 daily driver)
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1971 Montreal "The Full Monty". Fair winds and following seas

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59 102 Touring Roadster - restoration complete, enough Alfa for any rational man. Or irrational, for that matter
Oops. Add to the "present" list, 10204 01488, 2000 Touring Roadster project

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Two 1946 Stampe SV4C (c/n 294 "Rocinante" - wife's favorite airplane. RIP), and c/n 235 "La Bon Temps Femme" (gone to a new home, but never forgotten)
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post #8 of 13 (permalink) Old 09-19-2016, 09:37 AM Thread Starter
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Thanks, just ordered from PMB -thanks again all!
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post #9 of 13 (permalink) Old 09-20-2016, 05:56 PM
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PMB? who is that? probably something obvious and i'll kick myself! LOL Is there room to remove the pistons without splitting the calipers?

87 spider grad, 06 audi cab, 12 prius, 79 bellanca viking

Last edited by mgsteve; 09-20-2016 at 05:58 PM.
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post #10 of 13 (permalink) Old 09-20-2016, 06:17 PM
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PMB? who is that? probably something obvious and i'll kick myself!
PMB restores calipers. I had my brakes rebuilt by them it took almosst 2 months but they came back like new. There are a few threads on PMB.

http://www.pmbperformance.com/
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post #11 of 13 (permalink) Old 09-20-2016, 07:55 PM Thread Starter
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Yes, pistons can come easily without splitting, - I have 8 new rings coming, apparently, they can last 40-50 years according to PMB tech so I may not split and just use mirrors etc to inspect - so far, the first bore inspection looked great along with the piston.
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post #12 of 13 (permalink) Old 09-21-2016, 01:15 AM
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Quote:
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PMB? who is that? probably something obvious and i'll kick myself!
some years ago, PMB did a great write up on caliper rebuilding (it is a sticky in the Spider technical FAQ, top of page):
http://www.alfabb.com/bb/forums/susp...-calipers.html

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post #13 of 13 (permalink) Old 09-21-2016, 08:41 AM Thread Starter
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Thanks for reminding me of this sticky, very nicely done!
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