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ian series 1



Member Since: 17 Nov 2014
Location: south
Posts: 3127

United Kingdom 2008 Defender 90 Puma 2.4 CSW Bonatti Grey
Caliper piston size?
Does anyone know off the top of their head the size of pistons in an 08 rear Caliper?

It’s either 41mm or 46mm...

Cheers 80" 80" 86" 88" 90"

Wanted, Forward Control Anything considered.
Post #712179 13th Jun 2018 12:51pm
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jst



Member Since: 14 Jan 2008
Location: Taunton
Posts: 7686

2011 Defender 110 Puma 2.4 USW Stornoway Grey
Does it not depend on wheelbase ? 90 being the smaller one. Buy extra seal kits than you think you willneed! Cheers

James
110 XS Utility
130 Puma Station wagon/camper (in the making)
90 Puma Hardtop
Post #712184 13th Jun 2018 1:22pm
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ian series 1



Member Since: 17 Nov 2014
Location: south
Posts: 3127

United Kingdom 2008 Defender 90 Puma 2.4 CSW Bonatti Grey
That’s what I was hoping someone would say....

Cheers James Thumbs Up 80" 80" 86" 88" 90"

Wanted, Forward Control Anything considered.
Post #712185 13th Jun 2018 1:24pm
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strang



Member Since: 16 May 2012
Location: Happy Valley
Posts: 1362

United Kingdom 2009 Defender 90 Puma 2.4 XS CSW Galway Green
Are you fitting normal pistons or stainless? Thinking of getting some stainless ones from Zeuss Euro-Leafing to infinity and beyond.....
Post #712230 13th Jun 2018 6:26pm
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ian series 1



Member Since: 17 Nov 2014
Location: south
Posts: 3127

United Kingdom 2008 Defender 90 Puma 2.4 CSW Bonatti Grey
most probably stainless ones, I didn’t realise Zeuss did them? Thumbs Up 80" 80" 86" 88" 90"

Wanted, Forward Control Anything considered.
Post #712238 13th Jun 2018 7:56pm
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Merlin



Member Since: 30 Oct 2010
Location: Newmarket
Posts: 980

United Kingdom 
Use stainless steel pistons from :

http://www.zeusengineering.co.uk/

I got all 12 for about £110.

Merlin
Post #712315 14th Jun 2018 11:57am
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jst



Member Since: 14 Jan 2008
Location: Taunton
Posts: 7686

2011 Defender 110 Puma 2.4 USW Stornoway Grey
why not just put on new calipers? the time spent rebuilding with new pistons and seals seldoms pays off. Cheers

James
110 XS Utility
130 Puma Station wagon/camper (in the making)
90 Puma Hardtop
Post #712316 14th Jun 2018 12:44pm
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ian series 1



Member Since: 17 Nov 2014
Location: south
Posts: 3127

United Kingdom 2008 Defender 90 Puma 2.4 CSW Bonatti Grey
Just got 2 Genuine AP rears for £45 each + vat. Thumbs Up 80" 80" 86" 88" 90"

Wanted, Forward Control Anything considered.
Post #712317 14th Jun 2018 1:09pm
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jst



Member Since: 14 Jan 2008
Location: Taunton
Posts: 7686

2011 Defender 110 Puma 2.4 USW Stornoway Grey
exactly not that expensive if you factor in the time it takes to change pistons Cheers

James
110 XS Utility
130 Puma Station wagon/camper (in the making)
90 Puma Hardtop
Post #712329 14th Jun 2018 3:13pm
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Retroanaconda



Member Since: 04 Jan 2012
Location: Scotland
Posts: 2548

Scotland 
I fitted a set of Zeus stainless pistons to the front calipers on my 90 about 6 years ago. They haven’t rusted, but the seal retaining rings have and the pistons have collected a lot of some kind of dirt/scale - to combined result of which is basically the same as rusty pistons. I could, and will in time, disassemble them to clean the pistons up and refit them with new seals.

As such, and while decent replacements continue to be available at reasonable prices, I would concur with JST’s advice above.
Post #712373 14th Jun 2018 7:59pm
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ian series 1



Member Since: 17 Nov 2014
Location: south
Posts: 3127

United Kingdom 2008 Defender 90 Puma 2.4 CSW Bonatti Grey
I’ve gone for new rear calipers,

I replaced the front pair a few weeks ago with new ones, so seemed silly not to do the same with the rears. Thumbs Up 80" 80" 86" 88" 90"

Wanted, Forward Control Anything considered.
Post #712376 14th Jun 2018 8:19pm
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