 | Home > Maintenance & Modifications > Brake caliper paint |
 
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17384   
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The gallery seals on Defender calipers are something of a black art, and it really isn't possible to know what is in them until you take them apart and look. Plain disc calipers each have a single square section seal (rather like a square section O-ring) of a material that looks like nitrile, whilst ventilated discs have a tube of the same section and material with a reinforcing metal tube inserted in the centre. The tubular seal fits right through the spacing block between the caliper halves, so again each caliper has only one seal assembly. I do have a vague recollection of reading about some type of ventilated disc caliper which has two of the thin seals, one for each side of the spacer, but this could be my mind playing tricks.
It is highly likely that unless your calipers are prehistoric or have been dismantled before you will be able to reuse the existing gallery seals at least once. |
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8th Oct 2022 5:33pm |
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| Dinnu Member Since: 24 Dec 2019 Location: Lija Posts: 3414  
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Thank you Blackwolf for the detailed explanation.
I do not believe my calipers have ever been split, not in my ownership, and I bought it when it was relatively new. Is it easy to fit the metal retaining rings without splitting? Edit. Need to add that these calipers will be having their 35 year birthday soon, so unsure if they fall in the prehistoric category  . But a quick visual inspection show that are in generally better condition compared to the 10 year olds I have on the Puma  . 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black |
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8th Oct 2022 5:55pm |
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| Marky5522 Member Since: 14 May 2019 Location: Northern Ireland Posts: 21 
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If you are not in a panic to get them fitted you could have them powder coated a nice sedate colour and if done correctly will outlast any paint especially if you are heavy handed and regular with the pressure washer.
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9th Nov 2022 7:24pm |
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| The Zee Member Since: 26 May 2019 Location: Salisbury Posts: 289 
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My concerns with powder coating on calipers is the heat generated during braking: since powder coating is a polymer process that uses heat to "cure" or flow the polymer to a smooth(ish) coating.
Reheating or overheating can either cause the coating to degrade, soften or melt. Brakes can get suprisingly hot in use, normaly it is transitional heating; cool- heat spike-cool so you normally don't really notice the heating since the disc, pad, and caliper soak up the heat, transfer to the wheel, hub, and other bits and them cool in the airflow. But extened breaking/lack of cooling airflow can lead to heat build up. since calipers are close to that heat source a 2 pack curing or solvent loss paint process is advised. Zaid-M www.DefencePhotos.com 2014 Defender 110 Utility, 2.2 Puma, Indus Silver Not just transport more like a religion |
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9th Nov 2022 7:53pm |
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| MR_JAMES Member Since: 10 Oct 2013 Location: ESSEX Posts: 248 
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I have just had a tin of por-15 silver caliper paint turn up today for my 2pot mini calipers. Supposed to be really good but we will see! 1953 80"
1987 mini city e 2011 90" |
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9th Nov 2022 9:19pm |
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| Grenadier Member Since: 23 Jul 2014 Location: The foot of Mont Blanc... Posts: 5816  
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Marky, very smart.
Mr James, what colour? I have some yellow kicking about. But I’m thinking of going down the Foliatec route which also have excellent reviews. I can’t bl**dy decide. Monsieur Le Grenadier
I've not been everywhere, but it's on my list..... 2011 Puma 110DC - Corris Grey |
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10th Nov 2022 7:50am |
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| geobloke Member Since: 06 Nov 2012 Location: Nottinghamshire Posts: 4410
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 Why on Earth would you want them to be sedate in colour  Brighter the better...
In truth I didn't think clappers could be powder coated. |
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10th Nov 2022 9:00am |
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| geobloke Member Since: 06 Nov 2012 Location: Nottinghamshire Posts: 4410
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The Foliatec paint is what I used on Miffy's calibers and looks good. Time will tell regarding longevity... For me it was a case of being able to do the job now and the paint could be delivered to middle of nowhere north Wales... |
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10th Nov 2022 9:02am |
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| Marky5522 Member Since: 14 May 2019 Location: Northern Ireland Posts: 21
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The world is full of opinion, theory and self proclaimed knowledge but after 10k miles, 3 years and never leaving the drive without her 2200kg ifor Williams on the back, this is how that powder coating looks this morning 😊. Like most things if it’s prepped right and done right it will look right and last well. I must confess though I have mechanical perfection issues so my pads are removed and caliper pistons checked at least 2x a year just as a past time and for cleaning of course 😂.
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10th Nov 2022 9:56am |
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| geobloke Member Since: 06 Nov 2012 Location: Nottinghamshire Posts: 4410
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Stunning Marky5522. Love the powder coated Boost alloys too. Rather envious of them. Mine are looking decidedly paint-less these days...
I wonder if they can be powder coated in silver rather than black. Something about silver Boosts |
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10th Nov 2022 10:01am |
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| Marky5522 Member Since: 14 May 2019 Location: Northern Ireland Posts: 21
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You should have no trouble getting silver only problem will be deciding which of the 50 shades of silver you prefer 😊 powder can even be matched to paint colours these days.
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10th Nov 2022 3:43pm |
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| geobloke Member Since: 06 Nov 2012 Location: Nottinghamshire Posts: 4410
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Oh no it'll be like trying to decide what shade of white to paint the walls with...
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10th Nov 2022 3:44pm |
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| MR_JAMES Member Since: 10 Oct 2013 Location: ESSEX Posts: 248
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I ordered silver, and doing one caliper tomorrow. I really wanted the original ap lockheed pasivate gold colour but every gold paint i've ever seen looks horrible. 15 years ago I painted them with halfords caliper yellow which was awfull. then halfords caliper black which was okish. 1953 80" 1987 mini city e 2011 90" |
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10th Nov 2022 9:29pm |
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| The Zee Member Since: 26 May 2019 Location: Salisbury Posts: 289
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Marky552 - I had no intention to disparage or knock the quality, workmanship or finish on your calipers. If there was any hurt then I apologise for this since this was not my intent. As a chartered chemist who has worked formulating powder coatings, I know the quality has a very wide range, application is a lot less forgiving than paint coatings, and temperature resistance is also less forgiving. Again I apologise. Zaid-M www.DefencePhotos.com 2014 Defender 110 Utility, 2.2 Puma, Indus Silver Not just transport more like a religion |
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11th Nov 2022 8:43pm |
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