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Join Date: Dec 2006
Location: Northern VA
Posts: 585
991.1 master cylinder

2012 Carrera 2 coupe /991.1/ Brake master cylinder

1. What is the technique for removing the clutch slave cylinder return line to the MC fluid reservoir? Looks like a pull off / pry off ?? and insight? See pix

2. I’m replacing my master cylinder – as I think I “broke” the first MC by aggressively pumping the brakes after a brake fluid flush – and the reservoir was not topped off.. then I noticed “sponginess” in the pedal – it would not hold pressure. Later validated that chamber#1 [forward] I kept getting air and some fluid when brake pedal was pushed. Chamber #2 – all fluid.

3. What is consensus whether to bench bleed MC before installing in car or bleed MC after it’s installed. I am thinking of installing MC first – then bleed. Rationale – installing a wet/full of brake fluid MC/reservoir back into the car is messy and I’d like to keep the process as clean as I can.

4. I’ll also need to bleed the clutch system. My understanding – 991 clutch master cylinder – no bleed nipple. 991 clutch slave cylinder – bleed nipple – it bleeds the entire system. Am I correct?? Any other insights for bleeding clutch system??

Thanks for any assistance



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Kim Langley
2012 Carrera / 991.1
80 911SC
97 C230
73 BMW 2002Tii
Old 05-27-2019, 11:32 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
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Join Date: Dec 2006
Location: Northern VA
Posts: 585
Solved my own problem//

the return line is a press fit pulls apart

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Kim Langley
2012 Carrera / 991.1
80 911SC
97 C230
73 BMW 2002Tii
Old 05-31-2019, 11:40 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
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