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Car Forum / Porsche / Porshe 944 / October 2006'83 944 Master & Slave Clutch Questions
With the aid of some group members, I was recently able to eradicate some electrical gremlins in my '83 944 and get her back on the road after almost a year absence. I had since put about a couple hundred miles on her and was just beginning to enjoy the fine driving experience when another problem has arose which I will detail below. I was getting ready to head out last nite when I decided to double check my under hood fluids. Upon inspection, I noticed that the break reservoir was down to the minimum so I topped it off with DOT 4. I thought this was a bit suspicious since I recall it being full just a few days prior. In any event, I thought I was good to go until I got behind the wheel and noticed the clutch pedal was on the floor. E-gads. The next morning I looked things over and noticed that there was a small puddle of brake fluid on the ground slightly behind the firewall. I checked the clutch master cylinder and exposed plumbing but didn't see any obvious leaks. Do you think it's a pretty safe bet that the slave cylinder has failed? I haven't had the time to get under her yet but that seems to be what is indicated judging by the reference materials I have come across so far. I only have a little free time this Sunday so I would like to go ahead and order the parts if this sounds like the likely cause. Since I am relatively new to 944 "wrenching", I would also appreciate advice from the experts on the following: · If the slave cylinder has failed, will the master cylinder most likely follow soon after, and, if so, should I replace them both? Is the master cylinder that much more involved to replace? Can I comfortably do both in one afternoon? · How difficult is it to bleed the system? Do I really need to raise the rear of the car to do this? · Do I really need to replace the hose and metal clamps that go between the reservoir and master cylinder or can I reuse the old ones if they look okay? · Is jacking up the driver's side the best way to get access and work on these components? Sorry for all the questions -- thanks for all the help! Cheers! You will need to disconnect the battery and remove the starter to get to slave. Not hard to do. I recommend you purchase a rebuilt or new slave cylinder. You can bleed the air out by filling the reservoir, pumping up, and opening the nipple while your helper presses the peddle to floor or use a brake bleeding compressor kit. I use only DOT 5 which is silicon oil. Other fluids are deliquescent and collect water over time, corroding components etc. New hose would be recommended, also. I second darthpup . Fill it back up, pull the starter then find the leak. My guess will be the hose going from the master cylinder down to the slave cylinder. My hose started to leak. As long as you are there change the slave. It is not that expensive. There are 2 lines going from the master to the slave. One is hard and the other is soft. If I remember the "Pet" parts shows these hoses in reversed order. The soft being where the hard is and the hard where the soft actually is. Make sure you order the hose and not the line. > You will need to disconnect the battery and remove the starter to get > to slave. Not hard to do. [quoted text clipped - 5 lines] > components etc. > New hose would be recommended, also. Gotcha. I got a good deal on both the Master and Slave cylinders ($100 for both) so I went ahead and ordered them both. Due to time constraints, I'll probably only install the new slave and keep the master in reserve. The master doesn't look that hard to install but I'm a rather large guy and getting to some of these areas may represent a tight fit. Is the hose a "special order" part or can I just get some generic brake hose for the repair? I imagine the metal line should be okay unless I damage it during disassembly. Thanks again! You will need to order the hose for the car. It is not just bulk hose. I get most of my parts from www.vertexauto.com They have good prices and are great to deal with. 2 days usually to my front door. Bleeding is not that hard. My young daughter helped me but you do need to get down to the slave where the bleeder is. I put the car on jack stands so it is level. The problem with ramps is the nose is in the air and the clutch line is in the front of the brake reservoir so it can suck air easily as you are bleeding it. I made a power bleeder from a cheap pump up sprayer that works good. I got the plans on line. With air or no fluid, your pedal will slam to the floor due to a helper spring on the pedal. After a few bleeds your pedal will start to get firm again. Use a clear hose to get all the air bubbles out of it. Good Luck > Gotcha. > [quoted text clipped - 10 lines] > > Thanks again! Vetex doesn't seem to carry these parts (i.e., clutch hose and pipeline). Can anyone recommend another online vendor? Thx >Vetex doesn't seem to carry these parts (i.e., clutch hose and >pipeline). Can anyone recommend another online vendor? > >Thx Try Pelican, Paragon, If all else fails automotion.com (they can be a little pricey. Also call their support number and ask them, often it isn't listed on the website, but may be in stock. my .02 don call Vertex and give them the part number. They carry many items that are not on their site or even in their catalog. I am pretty sure that is where I got it. Then there is always the dealer (last resort) > >Vetex doesn't seem to carry these parts (i.e., clutch hose and > >pipeline). Can anyone recommend another online vendor? [quoted text clipped - 5 lines] > my .02 > don no no no - change both at once and be done with it - and buy a power bleeder or you will be amazingly frustrated. honest, I'm not trying to sell you anything, just the voice of experience fixing my own 944 cars for over 20 years > Gotcha. > [quoted text clipped - 10 lines] > > Thanks again!  SignaturePosted via a free Usenet account from http://www.teranews.com Get the hose here: http://oem.thepartsbin.com/parts/thepartsbin/models.jsp?make=PO&year=1983 Thanks to everyone for their help! I was able to replace my leaking slave cylinder with a remanufactured unit and get my 944 back on the road this past Sunday. The job was pretty straightforward. The only thing I almost managed to "screw up" was refitting the steel hydraulic line back onto the new slave. I always seem to have a problem getting these line fittings started. In this case, I almost had it cross-threaded.... All's well that ends well... Cheers! |
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