Jump to content

The RennTech.org community is Member supported!  Please consider an ANNUAL donation to help keep this site operating.
Click here to Donate

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)

Clutch Master failure?


Recommended Posts

I've had some trouble identifying a clutch issue and wonder if someone can advise if its likely to me the master/slave/accumulator or a good old fashioned leak. It an 02 996 turbo manual.

Over a period of a few days my clutch started to feel strange, with the biting point getting progressively closer to the floor, until finally the pedal wouldn't fully return, then fairly quickly I couldn't engage gear and the pedal wouldn't return at all.

At no point did the pedal feel "stiff".

Once I completely lost the pedal I noticed a drip under the front of the car (fairly central but towards the passenger side (UK car) but thats possibly just where it got out from the undertray.

I then checked the pentosin levels - rear seems correct, front was dry :o (car is just a couple of weeks back from a major service, so hadn't checked it myself since). No sign of overflowing at either.

Reading through the (many) other posts on this subject, I suspected the accumulator and/or slave, but now I'm not sure and wondering if the leak and dry reservoir at the front mean either a master cylinder or a good old fashioned leak.

I'm going to get a topup of pentosin and refill/bleed so I can at least trace the leak, but any thoughts on what may be the cause?

Link to comment
Share on other sites

    You can remove these ads by becoming a Contributing Member.

It sounds like you have a leak in the system. Did the garage do anything with the clutch/brake hydraulics when it was in for the service? I would return to the service garage and have them look at it. That Pentosin fluid is nasty stuff on plastics,rubber and painted surfaces so get it sorted asap.

Link to comment
Share on other sites

I had a similar clutch issue on boxster s (986). Pedal engagement height changed over time like you've indicated. Occasionally slipped the clutch a bit.

When I changed the clutch last year I went to bleed as per the maintenance manual, kept pedal fully depressed with a pressure bleeder on the reservoir. No fluid would come out of bleeder nipple, so against good judgement I pumped the clutch pedal as well, causing a sporadic flow of fluid out the nipple (all clean fluid, no debris). Obviously master wasn't behaving so I replaced it, & it works beautifully now.

I dissected the master cylinder to investigate, rubber seal on actuator shaft was deteriorated, allowing fluid past the shaft (must've been unloading hydraulic effort whilst pedal was depressed).

Hope this doesn't create more confusion, but you could try bleeding the clutch to see if the master behaves accordingly, or just to pick up any leaks under pressure.

Link to comment
Share on other sites

mattatk - did you have fluid dripping out due to the failed master?

I am starting to think this is a good old-fashioned leak - I'll refill with pentosin today to see if I get some pedal back (that would be good as it would save me trailering the 15 miles to the garage).

I don't know if the garage did anything - I would assume they had checked the level for a major service, but will ask the question.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.