5 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHCaliper servicing
Leading reported evidence
Use people
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
I've used the people that advertise in some Porsche mags (classicar automotive, see
Leading evidence: 'Use people' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'outer pistons are sticking/seized) can anyone point me' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Use people' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
outer pistons are sticking/seized) can anyone point me
Suggestion or failed attempt
No successful repair reported for this finding.
0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that suspect a cause
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suspected cause · Original poster
I'm about to fit new front discs and pads to my pre facelift 996, and I want to service the calipers at the same time (I suspect the outer pistons are sticking/seized) Can anyone point me to an appropriate thread - I don't think Rodney's goes into this - or give me the benefit of their own experience.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
outer pistons are sticking/seized) can anyone point me
No successful repair reported for this finding.
0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that suspect a cause
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suspected cause · Original poster
I'm about to fit new front discs and pads to my pre facelift 996, and I want to service the calipers at the same time (I suspect the outer pistons are sticking/seized) Can anyone point me to an appropriate thread - I don't think Rodney's goes into this - or give me the benefit of their own experience.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
5 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Porsche Club GB: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261027T061840Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Good morning and a very happy new year to all.
I'm about to fit new front discs and pads to my pre facelift 996, and I want to service the calipers at the same time (I suspect the outer pistons are sticking/seized) Can anyone point me to an appropriate thread - I don't think Rodney's goes into this - or give me the benefit of their own experience. Is it a DIY or indy job?
Many thanks
Jon
Early 986 and 996's suffered from water ingress into the brake servo, which could be causing the brakes to stick. Porsche modified the seals in 1999, which virtually eliminates the problem.
If it isn't the servo, unfortunately Porsche don't do a replacement seal kit. The calipers are made by Brembo, so you could find a Brembo agent to refurbish the calipers or supply the seals. They are available - a quick search on RennTech gave me this reference (
http://www.zeckhausen.com/Brembo/Consumables.htm
) but I expect it would be easy enough to find a UK supplier.
You might want to get them painted at the same time......
HTH
I've used the people that advertise in some Porsche mags (classicar automotive, see
http://www.classiccar.net/cdps/cditem.cfm?NID=4395
). They did my ATE calipers for my 3.2 and they put new pistons in (they get pitted) and pressure test. I don't know whether the aluminium Brembo calipers also use steel pistons, if they do they'll pit so you need new ones.
Thanks,both for helpful replies.
Having stripped both sides the pistons seem free and dry, but the old brakes were struggling even to be derusted by applying the brakes! Perhaps the servo is the problem, Richard,as you suggest.
I'll try the brakes again once the roads dry, and if new discs & pads haven't improved things, I'll see if Autostrasse can look at the servo. I presume any replacement would be the upgraded design.
Jon
PS I got them painted....
The servo is the same - it is the sealing rubber boot that was upgraded. Like I said, it's fairly common - the servo chamber fills with water and goes rusty inside. And I mean thick, brown, gungy rust - not a pretty sight.
This is a source reference. Confirm exact model applicability in the original material.
