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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHGT3 Master Brake Cylinder upgrade on 2000 C2 wPSM
Leading reported evidence
Use piwis
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
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Read evidence and context
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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.
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Leading evidence: 'Use piwis' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Fill m/c' (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
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Performed · outcome unconfirmed · Original poster
I just purchased 2 liters of brake fluid and used my power bleeder and my wife to pump the brakes.
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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Performed · outcome unconfirmed · Original poster
For the M/C I used the TRW equivalent from FCP Euro.
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
Flushing: Like Nick, I didn't try to pre-fill the M/C.
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.
1 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 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: 20261026T213932Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I've owned my 2000 C2 Coupe w/Tip & PSM for 25 years. Never been happy with the brake "feel." Too sloppy for my taste. The stopping power was there but pedal travel and sponginess was annoying. I had the GT3 master brake cylinder upgrade on my radar for years but had held off until I completed a complete refresh of the brake system. I recently did that, including SS brake lines & rebuilding the calipers with no improvements to the aforementioned complaints. I read through the few posts on the topic. The best of which was by Nickshu but was from 2017.
https://rennlist.com/forums/996-foru...my-996-c2.html
and decided now was the time.
Well, I've done it. And am really pleased. I'm not going to repeat everything from Nickshu's post but just add in a few details.
For my set up, I only needed two parts, the M/C and a 12 to 10 mm adapter for the rear brake line connection.
For the M/C I used the TRW equivalent from FCP Euro. Their PN is: TRW-PMN166 $315 or so.
For the brake line adapter, I found what I needed on ebay from Brake Hoses Unlimited.
https://www.ebay.com/itm/335199474202
See photo below for additional information but the key is both connections need to be "bubble." btw, from Nick's post, I believe C2's without PSM don't need the adapter.
Install was pretty straightforward and just like some of the youtube videos out there, however, one thing I encountered - was it was a bit tough to get the reservoir off of the M/C. The video's I saw, if they even mentioned it, just said pull it straight up. Well, mine felt like it was glued on. I didn't want to damage the reservoir, so I took the whole unit off and put the M/C into a vice so I could better access the connection between the reservoir and M/C. I pried the two apart trying to make sure my pry tools put most of any sharp edges on the M/C and not the plastic. During re-assembly, the resevoir popped right onto the new M/C.
Flushing: Like Nick, I didn't try to pre-fill the M/C. I just purchased 2 liters of brake fluid and used my power bleeder and my wife to pump the brakes. I also used my PIWIS to bleed the PSM system. It took a while and I went around a number of times until the wife hollered that the pedal had firmed up. My PSM threw a "fluid level code" which I couldn't clear until I finally flushed it enough.
Since then and a few fun drives in the mountains here, no issues and love that pedal feel.
A couple of additional comments: Based on my situation and Nick's post, I believe this solution works for 2000 to 2004 C2's with PSM. Earlier C2's likely need the later brake booster & related parts that later C2s have (see Nick's post, someone says pre-Sept 1999 cars need the later booster) And it looks like the C4 & Turbos are completely different animals (see some of the later comments in Nick's post)
So, if you have a car like mine (& Nick's) I highly recommend this reasonably easy upgrade.
New M/C installed. Note the adapter fitting on the rear brake line.
The brake line adapter I needed for the rear brake connection to the M/C.
This is a source reference. Confirm exact model applicability in the original material.
