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  #1  
Old 24th June 2008
chris97 chris97 is offline
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My Saabs: '91 900S, "89 900
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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,
Chris

Last edited by chris97; 24th June 2008 at 08:01 PM.
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  #2  
Old 24th June 2008
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900t 900t is offline
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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
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  #3  
Old 24th June 2008
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TheRedBaron TheRedBaron is offline
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Default

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?
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  #4  
Old 24th June 2008
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Default

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.
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  #5  
Old 25th June 2008
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li Arc li Arc is offline
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Default

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 interested...it didn't fit my 85'.

li Arc
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  #6  
Old 25th June 2008
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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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