davidGlenn

I replaced the master cylinder on my 79 sc two year ago, all was fine untill a few months ago when the pedal stopped fully returning after being depressed. Any ideas where to start??

BER

First, have you noticed an increased level of brake fluid loss? If so, look for a leaking master cylinder.

I would also suggest that you take a look at your pedal cluster and see if anything "unusual" has happened. The pedal cluster is under the carpeting and the wooden floor board (easy to remove).

You should look for leaking fluids, excessive dirt/grit that could be binding the pedals, broken springs, etc. I seem to recall a brake pedal return spring...check that it is attached and functioning properly.

I re-built the pedal cluster on my '84 911 a couple of months ago; I replaced the OEM plastic bushings with brass bushings. Cleaned everything (it was DIRTY). Pedals are now smooth and work great! You may just need to rebuild your pedal cluster if it has never been rebuilt.

Bruce

Bill Gregory

David,

I agree with Bruce, check your pedal cluster. I was amazed at the before/after difference when I rebuilt mine. Suggest using new springs, and there's a taper pin in there holding everything together. Note the word taper - tap it out from the right direction or you'll be at it a long, long time. I used brass bushings (Weltmeister kit, as I recall) also, and grease, although they say you can soak them in oil. Of course, given my plastic bushings lasted around 105K miles, replacing them like-for-like would have worked too.

Jdub

David:

If you are comfortable wrenching your own car, then replace the pedal rack bushings and wire-brush and prep the area under the pedal rack for the inevitable corrosion.

For $125.00 parts, you can replace your clutch cable and horseshoe spring as well. (The spring is under the trans.) You will be AMAZED at the nice feel of the clutch pedal when you finish. Money very well spent IMO.

Jw

davidGlenn

Thanks for the pointers. I'll pull back the carpets this weekend.

tyler

after the master goes, the pedal bushings almost always swell from absorbing the fluid like the guys said before...I would almost guarantee overhauling the pedal assembly, and real pain but it is the only way to fix the problem...the cage in my car is so in the way for that proceedure it was almost worth more to me to sell the car than fix the pedals

davidGlenn

Finally got around to rebuilding the cluster. Not a lot of room down there, but well worth the effort. Both the clutch and brake springs were shot,(not to mention all the bushings) Thanks for your help.

Bill Gregory

[quote]<strong>Finally got around to rebuilding the cluster. Not a lot of room down there, but well worth the effort. </strong><hr></blockquote>

For anyone else contemplating rebuilding the pedal cluster, once you disconnect the pedals you can remove the whole cluster and metal pan they sit in. Makes the rebuild easier, plus you can inspect the pan for rust.