 | Home > Technical > Seized calipers, opinions please. |
 
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| agentmulder Member Since: 16 Apr 2016 Location: Outer Space Posts: 1324  
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Assuming new pads and/or rotor, you're now exposing the already worn seals to a inconsistent surface. (The rust you mention)
Recommended new seal and retainer kit and stainless pistons (or at least new replacements). Some will suggest a new inter caliper seal also. Some will suggest now that you've split your calipers that you have to bin them regardless. Solved the bowel problem, working on the consonants... |
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20th Nov 2016 6:23pm |
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| gcc130 Member Since: 05 Jun 2015 Location: Wiltshire Posts: 742 |
I've just had to replace both ftront callipers on my 59 plate 50k 130. All but one piston were seized solid.
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20th Nov 2016 6:25pm |
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| ickle Member Since: 22 Jul 2010 Location: South Vendee Posts: 1785  
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Probably quickest to plumb back in, pack and clamp the free ones and push the stuck one out - watch out for the fluid though!!!
Zeus st/st pistons are the answer. |
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20th Nov 2016 6:26pm |
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| Welkman Member Since: 02 Nov 2014 Location: Essex colchester Posts: 329 
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oh
 I already purchased bearmach pistons and seals! What do people think about splitting them? Personally I cannot see why it is such an issue. The seals are easily located when you put the housing back together and as long as everything it spotless and lots of threadlock gets used what can go wrong? |
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20th Nov 2016 6:42pm |
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| Welkman Member Since: 02 Nov 2014 Location: Essex colchester Posts: 329
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Should I send back the standard kit and go for some stainless pistons?
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20th Nov 2016 6:49pm |
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| Rickydodah Member Since: 14 Jul 2014 Location: East Sussex Posts: 1091 |
Personally I wouldn't put them back together with the old seals, when they're initially assembled they are done in a clean environment but no special provision is made regarding cleanliness further then good enginèring practices. Good quality plated pistons such as AP are fine as they were quite likely to have been used initially. Stainless are good but I dont think the benefits align with the additional costs. I started with nothing and still have most of it left! |
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20th Nov 2016 7:00pm |
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| Welkman Member Since: 02 Nov 2014 Location: Essex colchester Posts: 329
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I am not sure what you mean by 'used initially' ?
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20th Nov 2016 7:13pm |
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| ickle Member Since: 22 Jul 2010 Location: South Vendee Posts: 1785
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I don't know if the seal between the caliper halves is available?
I went for Zeus because the genuine AP ones fitted from the factory were rusted and flaked after 5 years. I bought new genuine AP calipers, popped the pistons out, fitted the st/st ones and refitted the complete units to keep down time to a minimum |
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20th Nov 2016 7:16pm |
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| ickle Member Since: 22 Jul 2010 Location: South Vendee Posts: 1785
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And don't forget a tub of the special red grease to assemble everything with
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20th Nov 2016 7:18pm |
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| Welkman Member Since: 02 Nov 2014 Location: Essex colchester Posts: 329
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To be honest the bores are a bit corroded in the first third of the depth before the sealing ring so I am very tempted to pick up a couple of new AP calipers from paddocks and to send the piston and seal kits back. Do they come plated with zinc? The old ones were in a right mess when I removed them so some kind of paint or plating would be good to prevent the build up of rust.
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20th Nov 2016 7:33pm |
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| shaggydog Member Since: 12 Aug 2012 Location: Kent Posts: 3347 
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I recently changed my front callipers as a set.
I reckoned that you could buy a pair of callipers for under £100 and you just unbolt the old ones, put on the new ones and off you go. My originals lasted 24 years before being beyond repair, even if mine only last 5 years £20 a year is fine by me. Plus they have a warranty and no risk of me putting the seals in wrong and having to wait another 3-5 working days for new parts to arrive. Remember, that callipers corrode on the inside too. Its really not worth the hassle with such a safety critical part. Running Restoration Thread http://www.defender2.net/forum/post323197.html#323197 Self confessed mileage hunter  |
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20th Nov 2016 7:42pm |
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| Thon Member Since: 22 Nov 2015 Location: Salisbury Plain Posts: 696
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Stainless pistons are not expensive. I believe Zeus are a couple of pounds each more than conventional plated original equipment parts, or at least they were this Spring when mine were done. The additional cost is more than covered by the corrosion resistance in my view, having come across a gazillion rotten plated pistons in the various vehicles i've owned over the years. Just my $0.02  |
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20th Nov 2016 7:47pm |
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| Welkman Member Since: 02 Nov 2014 Location: Essex colchester Posts: 329
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I have the AP ones at £100 each on paddocks. Any ideas on a cheaper alternative? I really dont want to use britpart for the brakes !
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20th Nov 2016 7:48pm |
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| Rickydodah Member Since: 14 Jul 2014 Location: East Sussex Posts: 1091 |
As original equipment i.e. Girling I started with nothing and still have most of it left! |
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20th Nov 2016 7:50pm |
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