924Board.org

[judaslovepony]

Newbie here....PLEASE HELP!!!

I've had my 87 924S for about a 10 months now, and I could really use some help. This issue is fairly recent, and I can't for the life of me figure out what is causing it, but I think I've narrowed it down and could use a little confirmation.

When I put the clutch in, sometimes it comes back out, sometimes it stays glued to the firewall. Also, it seems to almost always want to go in, and even a small amount of pressure on the clutch pedal will cause it to get "sucked in" to the firewall, in which case it must be pulled out before I shift again. I had my girlfriend put the car into gear and out yesterday, and I noticed a clicking noise when the clutch comes out, but only after putting the transmission in gear, i.e she the clutch in, threw it into first, back to neutral, and let the clutch out, at which point it clicked. The click does not occur before you put the car into gear.

I thought it was a slave/master cylinder problem, but this mysterious click has me baffled! I realize this could be two different problems, but hopefully it is not too big of a fix. I am a car enthusiast and would do all the work myself if possible, but I need to know what I'm looking at here. Any help would be greatly appreciated!!

[Rasta Monsta]

I would inspect the master and slave for leaks. I like piece of mind, so if it were my car I would replace master, slave and rubber clutch line if unknown condition. Not much over $200.
_________________
Toofah King Bad

• WeiBe (1987 924S 2.5t) - 931 S3

[judaslovepony]

Wow thanks for the quick reply! I'm going to work on this guy this weekend and inspect those components.

I also forgot to mention that even when the pedal is all the way at the bottom, there is still a little play and it is possible to engage the clutch and the gears. It makes it really hard though, as the gear engages almost instantaneously as there is very little travel. I don't know if this helps but I thought I would throw it out there.

[joecitizennn]

The hydraulic clutch on the 924s has 3 seals, two in the master cyl and one in the slave. It is very easy to determine which one is leaking. If your pedal is creeping to the floor and your resovior shows no signs of fluid loss, it is your inner master cylinder seal. If you have fluid loss you can peer under your dash at the boot area of your master cylinder to check for fluid leakage. If wet it is your outer master cylinder seal and possibly the inner too. If dry check under the car at the bottom of the front bellhousing and the bottom of the starter. Run your hand across them and smell it. Brake fluid has a very distinct odor. If you find fluid that means the slave cylinder seal has failed. Failure is most common at the slave. Failure is most commonly due to neglect of owner to bleed the system regurlarly. Brake fluid absorbs moisture, which collects at the bottoms of the cylinders and forms rust. The rust acts like an abrasive and eats one side of the seal. Cylinders that have this problem have to be honed. Note, 100% of cylinders I have rebuilt required some amount of honing due to varying levels of pitting and rust. Maybe 10% were too pitted to re-use. I constantly restore 944 porsches so it pays me well to rebuild cylinders rather than spend a fortune buying lots of new ones. However for someone who wants to fix his daily driver and do it surely and easily I agree with rasta that buying new is the way to go.

The click you are hearing is most likely the clap of your pressure plate hitting the clutch disc. The noise will be most noticeable when your driveshaft has come to a stop and you pop the clutch in neutral. Probably nothing to worry about but bear in mind of your car has the original clutch disc, it has a now brittle rubber center which can fail. There are metal prongs inside it designed as a limp home feature. They can make a loud clack when the clutch is released as well. These prongs usually fail when the rubber center explodes however. If you don't know the condition of the clutch it pays to drive easy.
_________________
87 924s
88 924SE gone
447 hp cgt clone
87 924S gone
84 944 sold
83 944 sold
89 turbo S LSD, ABS etc
86 951 white rocket
85 944 sport everything.
84 944 sold.
87 944 sold

[judaslovepony]

Thanks so much Joe! I'm going to be looking at this tonight, I'll pop back if more questions come up.

[Paul]

Don't drive the car until you fix this, tranny repairs are very expensive.
_________________
White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.

[RedChar]

I had the same *exact* problem. A couple of weeks ago I replaced the master and the slave with new ones. I also took the opportunity to rebuild the front calipers and bleed the brakes. Bleeding the slave clutch is a pain, but its was well worth it and the clutch pedal now works beautifully. [url=http:/www.clarks-garage.com]Clark's Garage[/url] has, of course, amazing instructions for the replacement of both.
_________________
'87 924s - Haven't come up with a good nickname
'07 - MINI Cooper, base
'85 - Mercedes 300td LeMons veggie oil car - The Frau

[mehall]

1 & 1/2 years ago (just before I had a stroke, so the cars hasn't been driven much) I had a buddy replace the master & slave with new lines. Befrore they showed problems, the clutch engaged about 1/2 way out, now it's near the top of the pedal. There is no noise form the clutch, but very little peda.

The sight hole indicates about half used, so I would expect more clutch.

Any ideas?
_________________
Mark

'87 White 924s manual
'94 Lexus LS400

www.kcws.org

[JUT]

Help! My car has this evening suffered a sudden and total clutch failure!

No visible loss of fluid from the master cylinder, and I hadn't noticed any previous problems.

Got in the car tonight, selected reverse out of my parking space, pulled out, depressed the clutch to select first, then as I tried to engage the biting point the pedal dropped to the floor and the car lunged forward and stalled.

Pedal can be pulled out by hand but springs back to the floorboards at the lightest touch. Car can be moved in and out of gear with the engine off, but lunges when the car is turned over if you leave it in gear.

Any ideas?

[Paul]

You have air in the system caused by:

low fluid level in the reservoir

leak in the hose from the reservoir to the clutch master cylinder

leak in the hose from the clutch master cylinder to the slave cylinder

leak in the clutch master cylinder

leak in the slave cylinder

loose on missing bleeder on the slave cylinder

The last time I had a problem like yours it was a hole in the rubber/metal hose between the 2 cylinders.
_________________
White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.

[joecitizennn]