Master Cylinder

[hot66]

Got a feeling I need to replace the master cylinder in my 2.4S.

Car has been sat for a few months and brake pedal now goes to the floor but no fluid loss from reservoir … can get firmer pedal with a bit of pumping. Happened before and I just bled it all through and that sorted it but there must be a reason so I’m assuming the master cylinder seals are boarder line

So, anyone know if the master cylinder is the same for all 69-73 911’s ?

[markm]

Part No.91135501202 says it fits Porsche 911 1968-76, to you sir, genuine one circa £600, alternatives are available

[Bootsy]

And if you order from Design 911 use this linkhttps://www.design911.co.uk/?utm_source=ddk-for ... ddk-online

[anglophone1]

Bugger - just done an order there and forgot about this!
C

[Nine One One]

There is a larger diameter bore that Design 911 are good at sending out, saying it fits - it does but makes the pedal very hard! So make sure you order the correct diameter if ordering from them.

[Ian Comerford]

And don’t forget to bench bleed it before fitting, it will save you pushing all of that air out to the brakes. Apologies if you knew that

[70sThrowback]

I looked at both options from D911, I was told do not get the larger size (23mm?) anyway I didn't and all good.