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Old 24th June 2008
chris97 chris97 is offline
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Join Date: Apr 2008                                                
Location: Worthington,MA
My Saabs: '91 900S, "89 900
Posts: 30
Default Brake Fluid Disappearing!!

Hey Guys,
Recently my '91 900S na seems to be drinking brake fluid, I'm having to add some every couple of days to satisfy the BRAKE FLUID light. I've looked around it, and can't find any leaks, anyone seen this before?
Oh yeah, the brake pedal is hard, but it stops well, and it does shudder,vibrate,pulsate when stopping from speed.

Thanks in advance,

Last edited by chris97; 24th June 2008 at 08:01 PM.
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Old 24th June 2008
900t's Avatar
900t 900t is offline
Join Date: Dec 2002                                                
Location: Montreal, Canada
My Saabs: 1989 900t, 1990 900t, 1990 900 S, 87 SPG
Posts: 18,382

Well it is leaking for sure

I had a weird failure, my car had leaking fluid from the brake line inside the cabin. Take back the driver's footwell carpet maybe it is wet
Turbo allows the valiant who has appeared at the wheel SAAB to gain momentum for 200 km/h Charm SAAB Turbo also that it to you not bad Porsche on it it is possible with speed of pregnant turtle feeling itself in full comfort which by the way our hero obeys a rudder reliably and confidently the truth management hardly will twirl a steering wheel by one finger uneasy. Without the hydraulic booster quickly enough perishes a steering shaft, but to change its hemorrhoids from the most fierce
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Old 24th June 2008
TheRedBaron's Avatar
TheRedBaron TheRedBaron is offline
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Join Date: Aug 2006                                                
Location: Washington, DC
My Saabs: 1990 900 turbo
Posts: 5,779

Also make sure it's not the clutch that's leaking, they share fluid. Usually would be the slave. Clutch seem like it's a little overeager to grab, by any chance?
The faster you go, the more you see.
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Old 24th June 2008
Steve Corgan's Avatar
Steve Corgan Steve Corgan is offline
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Join Date: Aug 2006                                                
Location: Wildwood, Missouri USA
My Saabs: 89 SPG, 90 SPG, 91 900T Vert
Posts: 1,534

I had a leak one time in the flex portion of the fluid line going to the clutch. I was expecting to find the leak inside the cabin where RedBaron and 900t suggested, but it was in the line. Wherever it's coming about, it's bound to be wet.
Steve Corgan,
The Saabster
89 SPG Edwardian Gray, 90 SPG Talladega Red, 91 900 Turbo Beryl Green Vert
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Old 25th June 2008
li Arc's Avatar
li Arc li Arc is offline
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Join Date: Jul 2006                                                
Location: Calgary, AB, Canada
My Saabs: '85 900 T16 Sedan
Posts: 2,184

Definitely make sure there is no fluid around the clutch mechanism. Slave cylinder is under centre front of the car (just in front of the engine), and master cylinder, if it's leaking, usually leaks into the cabin. The clutch line, if it's leaking, usually leaks from the rubber hose interconnects from the steel line, or at it's loose at one/both ends, the latter of which shouldn't happen if it's been working for a long time without being touched. Same goes for the brakes themselves, though if they feel solid they should be fine.

The last suggestion is that if you've exhausted all those possibilities and still don't see a leak, you've got a leak into your vacuum brake booster, which means it's failing and needs to be replaced, even though they rarely fail. If such is the case, I've actually got a brake booster from a 91' I pulled from the yard here if you're didn't fit my 85'.

li Arc
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Old 25th June 2008
Tomarse's Avatar
Tomarse Tomarse is offline
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Join Date: Sep 2003                                                
Location: crewe UK
My Saabs: LPG '80 99GL, '80 99T 2dr, LPG '93 ng900
Posts: 5,677

My truck used to loose fluid into the brake servo!. Eventually it filled enough that it started coming out of the mastercyl/servo joint in quantity - but it took a while.

It uses almost the same bits as the saab (it now has proper saab 900 bits fitted!), so it could happen on a saab!
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