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YOUR RESEARCHReplacement Brake Lines - Brake Bleed Question
Leading reported evidence
Replace front lines my system drained itself
Performed · outcome unconfirmed
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Performed · outcome unconfirmed
When I changed the front lines my system drained itself.
Clean inspection, refurb where required and new paint
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
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Discussions that contain suggestions
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Suggestion · Original poster
I am looking at replacing all flexible brake lines with stainless steel alternatives, whilst at the same time, I am looking to remove the callipers for a full clean, inspection, refurb where required and new paint.
Leading evidence: 'Replace front lines my system drained itself' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Clean inspection, refurb where required and new paint' (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.
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
Had to take it to garage who used a vacuum bleeder with great success.
Clean inspection, refurb where required and new paint
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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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
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Suggestion · Original poster
I am looking at replacing all flexible brake lines with stainless steel alternatives, whilst at the same time, I am looking to remove the callipers for a full clean, inspection, refurb where required and new paint.
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
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 am looking at replacing all flexible brake lines with stainless steel alternatives, whilst at the same time, I am looking to remove the callipers for a full clean, inspection, refurb where required and new paint.
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
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 am not looking to do a full flush as my fluid has been changed in the last year, so is the use of a PST2 really necessary for a top up to replace what will be lost only from the flexible brake lines and callipers?
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Clean inspection, refurb where required and new paint
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 am looking at replacing all flexible brake lines with stainless steel alternatives, whilst at the same time, I am looking to remove the callipers for a full clean, inspection, refurb where required and new paint.
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 am looking at replacing all flexible brake lines with stainless steel alternatives, whilst at the same time, I am looking to remove the callipers for a full clean, inspection, refurb where required and new paint.
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 am not looking to do a full flush as my fluid has been changed in the last year, so is the use of a PST2 really necessary for a top up to replace what will be lost only from the flexible brake lines and callipers?
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
For cars with traction control or Porsche Stability Management (PSM), you need to use the Porsche System Tester 2 (PST2) in order to activate the valves in the hydraulic unit during the bleeding process...
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.
9 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: 20261026T181445Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi all
Reference 2002 C4 tiptronic with PSM.
I am looking at replacing all flexible brake lines with stainless steel alternatives, whilst at the same time, I am looking to remove the callipers for a full clean, inspection, refurb where required and new paint.
The question I have relates to the brake bleed. In the 101 projects book by Wayne Dempsey, it states the following...
For cars with traction control or Porsche Stability Management (PSM), you need to use the Porsche System Tester 2 (PST2) in order to activate the valves in the hydraulic unit during the bleeding process... you will need to go to a shop that has a PST2 so that the brake system can be bled properly.
I am not looking to do a full flush as my fluid has been changed in the last year, so is the use of a PST2 really necessary for a top up to replace what will be lost only from the flexible brake lines and callipers?
I appreciate any help you can provide :thumb:
When I changed the front lines my system drained itself. I bled as normal and asked my indy to re-bleed doing the ABS valve thing but was told they never bother.
I'm just changing the remaining original rigid lines (x3) and rear hoses / calliper pipes and have put a rubber glove on the reservoir and screwed the cap back on - this has stopped it draining due to gravity, so apart from the new lines no air should get in.
Ian
Question has already been answered but just to point out ..
You only use the tester to bleed the abs unit when it is replaced or has drained out .. as the valves are closed when not in use then it technically cant drain out by draining the brake fluid.
It holds very little actual brake fluid so is not worth using on a normal brake fluid change ... it's only ever done to get air out of it , at least that's the only times i've ever done it .
Unless you've got air through the master cylinder you don't need to activate the abs valves for a bleed. However one thing you can do is ensure you get some fresh fluid going through by triggering the ABS a few times on the drive after you've flushed the system.
I struggled to get a good pedal with my pressure bleeder.
Had to take it to garage who used a vacuum bleeder with great success.
Wasn't hooked up to the computer to do it.
Oh yeah and before you go to the bother you want to check all the old old steel lines along their whole length as they corrode in the clips over the gearbox unseen, in front of steering rack, and under the undertrays.
In the middle of this job at the moment. When I asked regarding the ABS pump I was told it would only need activating if I got air in the system up stream of the pump.
I've removed all calipers and flexis and just plugged up the open ends of lines with "things". The cap is still tight on the reservoir and very little fluid has leaked out despite the car now being sat for a few weeks due to complications.
This is a source reference. Confirm exact model applicability in the original material.
