Brake Master Cylinder - Replace with Dual or Single?
 

Hi All,
Bit of background first:
Last night my brakes failed. They felt weak, and after Id pumped them a few times the pedal went straight to floor. No pressure at all. I called the AA out who towed it to a local Porsche garage.

The garage say it's the master cylinder. I havent had a chance to inspect it fully myself, but there is some fluid under the pedals.
He is quoting about £300 to replace, but I can get a master cylinder myself for £95.

But the parts place say it's a single master cylinder and not the dual type as on my car (US '76 911).

So my question is can I just fit a single master cylinder in it's place?

This would be the first work I've done myself on my Porsche, so Im being a bit cautious. The last thing I worked on was an '82 Ford Escort XR3i. ;-)

Thanks, Alex

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911 2.7S Targa
email:alex@cascade.f9.co.uk

Alex,

Yes, I believe you can replace your single circuit master cylinder with a single master cylinder, dual circuit unit for very little difference in cost! And, the only additional parts you would need are a dual-conpartment brake fluid reservoir, and the tubing to connect it to the dual-circuit master cylinder. USA-spec parts may be a bit hard to get in the UK, but would probably be worth the wait.

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Warren Hall
1973 911S Targa

Hi,
Thanks for the response Warren.

I think I confused my question a bit, I have US car at the moment with the Dual Master Cylinder.

I was actually wondering if I could fit a single one in it's place.

So you gave me the info I needed, only in reverse. :-)

On reflection I think I will try to get the dual master cylinder and not convert it to a single one.

Thanks for your help.
Alex.

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911 2.7S Targa
email:alex@cascade.f9.co.uk