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Join Date: Jul 2003
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My 944 is losing brake fluid and my cluth pedal has collapsed.

About 3 weeks ago I noticed a large puddle of ATE Blue under my car. Due to time contraints I didn't get a chance to investigate until yesterday. When I pressed on the clutch pedal, it went clear to the floor with no resistance and won't rebound. The fluid appears to be leaking from the rear of the engine by the firewall. I'm guessing this is the cluth slave cylinder leaking. Any idea if this is something I can fix myself. Thanks guys,,

Craig
Old 11-07-2003, 09:06 AM
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This maybe due to the master cylinder reservoir grommets leaking and allowing the level to drop too low, try topping up and pumping the clutch pedal and checking for leaks.


Check the back of the clutch master cylinder, usually when one is leaking the other one is too. Also carefully inspect the flexible pressure hose.
Yes, you can do it yourself, get the master and slave cylinders and the short length of blue feed hose. The biggest problem is bleeding the system, it's best to have a power bleeder.
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Old 11-07-2003, 09:36 AM
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Where exactly is the master cylinder reservoir located. I haven't actually got under the vehilce yet. I've got a mighty vac for brake bleading, but is there another type of bleeder I need to purchase? Thanks again.
Old 11-07-2003, 11:22 AM
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The master cylinder is right beside the brake booster, follow the blue hose from the brake fluid reservoir..assuming your car is left hand drive.
Right hand drive cars have their own reservoir.
The Mity-vac will do just fine.
You should have a workshop manual before working on this car.
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From November 2012; Precision Porsche Specialist
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2001-2012 Gerber Motorsport Inc. 206-352-6911
07.15.06 1996 Ducati 900SP. Suprisingly enough, it's red
08.16.09 1999 Kawasaki ZRX1100. Green.
Old 11-07-2003, 11:46 AM
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Is there any brake fluid on the inside of the car? Check the carpet, if the clutch master cylinder is leaking, it will leak into the passenger compartment and you will lose brake fluid.
I know, because i go through them like crazy , had to change my carpets once already. Check the rubber boot that seals the piston shaft that goes to the clutch pedal, see if it is wet.

When the clutch master cylinder goes bad the pedal goes to the floor. and will stay there
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Old 11-07-2003, 12:05 PM
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The clutch and slave cylinder replacement is pretty straightforward and easy, even for an amateur......it's the bleeding procedure that you want to fear.
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Grant
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1989 Porsche 944, 1973 VW Beetle - gone but not forgotten
Old 11-07-2003, 12:20 PM
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Change them both (master and slave) Do a search on this topic, usually whan one goes, the other one will go very quickly afterward. Save yourself the trouble of having to do the job twice. In addition, many times the bleed screw on the slave cyl. will be frozen anyway .

Mike
Old 11-07-2003, 12:25 PM
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Garage
Do your car a favor and replace both with 951 (turbo) replacements. Both will bolt right up and are a great upgrade for all 924/944 brake systems.
When you go to bleed the brakes pump the brake pedal (3) three times slowly but fimly and hold to the floor with the third pump. Start with the rear of the car slightly elevated on jack stands (for saftey) and begin at the right rear. Than complete the left rear (same proceedure) and lower rear of car and do the same for the front brakes. Again start with the right front and complete the system. Remember to keep the reservoir filled or you have just done the job for nothing!
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Old 11-08-2003, 06:23 PM
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Er, the Turbo and 944S2 parts are all the same part numbers so hardly an upgrade.

Master Cyl 477 721 171
Slave Cyl 944 116 237 00
ALso fits 924 Turbo
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2001-2012 Gerber Motorsport Inc. 206-352-6911
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Old 11-08-2003, 06:52 PM
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If you manage to destroy the hydraulic line that goes between the master and slave I have an extra brand new one that I'd part with for a song :-P
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Grant
1974 Vespa Rally 200, 1974 Vespa Primavera 125, 1963 Solex 2200, 1938 Buick Special, 2008 Mini Cooper S, 2010 Mazda CX-9 - in the stable
1989 Porsche 944, 1973 VW Beetle - gone but not forgotten
Old 11-08-2003, 07:23 PM
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Hey guys,

Thanks for all your help here. I really appreciate it. So here's my plan...

1) order both master and slave cylinders from Zims..

2) roll my car onto ramps... (I'm guessing this is the only way to access these parts)

3) find out where the hell these things are and replace them

4) bleed the brake system

I've got a manual but I don't see anything about replacing those cylinders. I think I can wing it though. I do find it odd that my brakes still seem to work just fine and that its my clutch pedal that is inoperable...

Any suggestions here...Thanks again...
Old 11-10-2003, 10:05 AM
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Your slave cylinder is just next to/above the starter. The master cylinder is next to the brake booster. I found that the slave was a breeze to uninstall/install, just remove the starter (make sure to diconnect the battery!) and undo the two bolts. The biatch is the master cylinder, or at least it was on my car....just a very tight fit for my big hands. As for ramps, they would be convenient if you have them but I used floorjacks and stands without any problem. Some tips:
Clamp off the blue tubing leading from the brake master cylinder resorvoir to the clutch master. They make a special clamp for this, but anything that will keep the tube closed without damaging it should be OK....I used a small pair of visegrips with foam rubber taped to the jaws.
I would check out this link
http://clarks-garage.com/shop-manual/clutch-02.htm
for a great "how to" on bleeding the system. Good luck!
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Grant
1974 Vespa Rally 200, 1974 Vespa Primavera 125, 1963 Solex 2200, 1938 Buick Special, 2008 Mini Cooper S, 2010 Mazda CX-9 - in the stable
1989 Porsche 944, 1973 VW Beetle - gone but not forgotten
Old 11-10-2003, 10:26 AM
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Old 11-10-2003, 10:26 AM
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