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Front brake caliper rebuild. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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YOUR RESEARCHFront brake caliper rebuild. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Leading reported evidence

Recommend correct seal kit

Suggestion or failed attempt

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
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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 contain suggestions: 1

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Suggestion
Just thinking loud, since the caliper repair kits are not really expensive, perhaps check with the Porsche dealer (by providing your VIN), they could recommend the correct seal kit..?
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Front brake caliper rebuild. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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Leading evidence: 'Recommend correct seal kit' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Recommend correct seal kit' (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.

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Repair kits are not really expensive, perhaps

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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Discussions that contain suggestions: 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.

Suggestion
Just thinking loud, since the caliper repair kits are not really expensive, perhaps check with the Porsche dealer (by providing your VIN), they could recommend the correct seal kit..?
Original post Read captured discussion
Front brake caliper rebuild. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Use smaller parts

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 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.

Suggestion · Original poster
I do not have the calipers in front of me at the moment to verify but he has been successful using the smaller parts from the kit to rebuild at least 3 of the 4 pistons in the first caliper.
Original post Read captured discussion
Front brake caliper rebuild. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Frequently discussed actions (3)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Recommend correct seal kit

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 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.

Suggestion
Just thinking loud, since the caliper repair kits are not really expensive, perhaps check with the Porsche dealer (by providing your VIN), they could recommend the correct seal kit..?
Original post Read captured discussion
Front brake caliper rebuild. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Repair kits are not really expensive, perhaps

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 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.

Suggestion
Just thinking loud, since the caliper repair kits are not really expensive, perhaps check with the Porsche dealer (by providing your VIN), they could recommend the correct seal kit..?
Original post Read captured discussion
Front brake caliper rebuild. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Use smaller parts

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 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.

Suggestion · Original poster
I do not have the calipers in front of me at the moment to verify but he has been successful using the smaller parts from the kit to rebuild at least 3 of the 4 pistons in the first caliper.
Original post Read captured discussion
Front brake caliper rebuild. - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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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.

4 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

986Forum: 1 discussions

0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.

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Generation: 20261026T105141Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I am rebuilding my front calipers (non S 2000 model) on my boxster and ordered the 36mm 40mm kit as everything I have found here and online says that is the piston diameter for each caliper. My Dad currently has my calipers and is rebuilding them but says that the larger diameter dust shields and seals do not fit and that it appears all the pistons are the same size (36mm?). I do not have the calipers in front of me at the moment to verify but he has been successful using the smaller parts from the kit to rebuild at least 3 of the 4 pistons in the first caliper. Is something off here or are there calipers with 4 36mm pistons in each one?

POST 2Original post

Just thinking loud, since the caliper repair kits are not really expensive, perhaps check with the Porsche dealer (by providing your VIN), they could recommend the correct seal kit..?

POST 3Original post

From factory, all 986 have 40/36 front and 30/28 rear. Also, it doesn't really make sense to make calipers with equal size pistons. The staggered size is there to reduce tapered wear of the pads.

POST 4 / ORIGINAL POSTEROriginal post

I picked up the calipers this evening and my dad was comparing the size of the pistons with the 36mm inverted over the 40mm or something and the lip was making them look the same size I think. I could plainly see the difference between them, but he had trouble seeing the difference...disaster averted and the rebuild process continues.

This is a source reference. Confirm exact model applicability in the original material.