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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHFront brake leak - new calliper?
Leading reported evidence
Use cut off of matting
Performed · outcome unconfirmed
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Read evidence and context
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Performed · outcome unconfirmed
When I typed of using mole grips in times past, I was careful of both the crush damage factor on the internals of the hose, and used a cut off of matting to ensure the mole grip teeth did not damage the flexible outer surface....
Leading evidence: 'Use cut off of matting' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check pipes over' (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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Suggestion
With skills like those of your nephew to hand, might be worth having him do both front callipers and check the pipes over.
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Suggestion · Original poster
Whipped the wheel off for a better look and to clean any brake fluid off - definitely that connecting line that’s leaking - so hopefully a relatively simple job
Replace connection pipe if needed at the same time
Suggestion or failed attempt
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Suggestion · Original poster
May have lucked out - spoke to my nephew who is a F1 mechanic/pit crew for Haas and apparently used to rebuild brakes every 2 races on the F4 cars whilst working at DoubleR - He has some time during the F1 summer break so is going to take the caliper off and replace all the seals and give it a once over and replace the connection pipe if needed at the same time.
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.
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Suggestion · Original poster
May have lucked out - spoke to my nephew who is a F1 mechanic/pit crew for Haas and apparently used to rebuild brakes every 2 races on the F4 cars whilst working at DoubleR - He has some time during the F1 summer break so is going to take the caliper off and replace all the seals and give it a once over and replace the connection pipe if needed at the same time.
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
Whipped the wheel off for a better look and to clean any brake fluid off - definitely that connecting line that’s leaking - so hopefully a relatively simple job
Replace connection pipe if needed at the same time
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
May have lucked out - spoke to my nephew who is a F1 mechanic/pit crew for Haas and apparently used to rebuild brakes every 2 races on the F4 cars whilst working at DoubleR - He has some time during the F1 summer break so is going to take the caliper off and replace all the seals and give it a once over and replace the connection pipe if needed at the same time.
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
May have lucked out - spoke to my nephew who is a F1 mechanic/pit crew for Haas and apparently used to rebuild brakes every 2 races on the F4 cars whilst working at DoubleR - He has some time during the F1 summer break so is going to take the caliper off and replace all the seals and give it a once over and replace the connection pipe if needed at the same time.
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
When I typed of using mole grips in times past, I was careful of both the crush damage factor on the internals of the hose, and used a cut off of matting to ensure the mole grip teeth did not damage the flexible outer surface....
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.
15 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
911uk: 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: 20261027T075545Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
noticed something wet on the drive - closer inspection confirmed a leak of some sort - liquid was clear and oily
No warning lights on so moved it on the drive and brake pedal was very soft. Looks like the little pipe on the bottom of the calliper is leaking and inside of the wheel was coated with brake fluid.
washed it off as best I can, but need to determine if it’s a replaceable part or if a new calliper is needed - recommendations welcome
Quote
It looks like it could be the connecting pipe that has failed as brake fluid looks to be running down the small pipe and dripping off at the lowest point.
Is the correct part would you say?
P58715 - 99635196100 - Connecting line - FRONT LEFT / LEFT / REAR RIGHT / RIGHT / OPTION: STEEL (Option code: ACIER) for Porsche
P58715 - 99635196100 - Connecting line - FRONT LEFT / LEFT / REAR RIGHT / RIGHT / OPTION: STEEL (Option code: ACIER) for Porsche
www.rosepassion.com
Whipped the wheel off for a better look and to clean any brake fluid off - definitely that connecting line that’s leaking - so hopefully a relatively simple job
Looks to me like there is some sort of shrouding around the pipe which perhaps has allowed in moisture and held it to allow corrosion to eat away at the pipe till it failed in a limited way... I suspect that the shrouding may be intended to protect the pipe from any chance of it making contact with the calliper, or suffering from heat generated by the disc under heavy braking thus avoiding heat transfer to the brake fluid....?
BTW if your brake pedal goes to the floor while braking just pump like mad, as opposed to trying to bury the pedal through the floor, even with a leaking pipe if you pump fast enough you will manage to retard progress by some degree, till you eventually run out of brake fluid...!!!
I'm not risking driving it anywhere, even just moving it on the drive and the fluid was spraying out under any pressure. Need to figure out a way of getting to a local garage. Had considered using a mobile mechanic but concerned if the pipe is seized into the calliper whether they would have the tools to fix it
Sorry if you thought I was suggesting you drive any machine with leaking brake fluid at any time..... Though long story very short, I have clamped off a flexy hose with more grips to get home on one occasion.
No, all good although the mole grips could be a good idea
Its still dripping way, both nuts and the pipe directly beneath each is dry so it must be the pipe within the shrouding that has failed.
Will have to wait until we get back from holiday to fix it, so is currently jacked up and supported with the wheel off an an oil drip tray underneath. At least no one can steal it
I read some previous threads recently on here documenting the various failing brake pipes on 996, might be helpful depending who you’re getting to look at it.
Best to stop the fluid loss, you can but a brake hose clamp at Halfords, if there might be one near where you are, plenty available on the www.. any local garage can sort out a brake pipe issue.... Also if you clamp it off, might be worth topping up the brake fluid to save having to mess around bleeding brakes once you have inadvertently allowed it to drain down and a load of air got into the system...?
Thanks for the tip - i've clamped off the flexi hose - after some more googling, the other potential cause is one of the pistons leaking and dripping onto the connector line - so going to have to remove the caliper for a better investigation
May have lucked out - spoke to my nephew who is a F1 mechanic/pit crew for Haas and apparently used to rebuild brakes every 2 races on the F4 cars whilst working at DoubleR - He has some time during the F1 summer break so is going to take the caliper off and replace all the seals and give it a once over and replace the connection pipe if needed at the same time.
Replacement seal kit ordered from Bigg Redd
With skills like those of your nephew to hand, might be worth having him do both front callipers and check the pipes over.
Always wary of clamping old flexy hoses lest one might create another problem.... When I typed of using mole grips in times past, I was careful of both the crush damage factor on the internals of the hose, and used a cut off of matting to ensure the mole grip teeth did not damage the flexible outer surface.... proper hose clamps are the best choice to minimise possible hose damage.
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