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Old 08-13-2013, 12:05 PM   #1
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Caliper Bushings / Front Brakes

ok so im a bit stumped, i have an 05' 9-5 Aero that i purchased recently. I noticed it was missing the front caliper springs. I did get the caliper clunking sound over bumps.

I picked up some caliper springs at the local boneyard and I put them on last night. They seemed extra hard to put on. I had to tap the caliper with a rubber mallet a little and use a small screw driver to somewhat pry them on.

anyhow after putting them on i now have a very soft pedal.

i took the wheels off a 2nd time. Before removing the 2 caliper pin/bolts i noticed the caliper had about .5" of play in a forward direction which i though was odd. Anyhow so i took everything off and inspected and didnt see anything out of the ordinary. Put everything back together and pumped the brakes. The pedal pretty much goes to the floor with the car on. I had someone apply the brakes while i watched and the calipers compress and slide forward about .5". Also when i apply the brakes i can feel the tension of the caliper springs through the pedal.

Would worn caliper bushings cause this? Or did i somehow manage to damage my calipers when installing the caliper springs?
Air in the system by compressing the caliper?

the brake fluid is a little dark but filled to the appropriate level.
no leaks.
im not sure how long the previous owner drove without the caliper springs, but the car stopped real good prior to me putting the caliper springs on.


any ideas??

Last edited by dasaabguy; 08-13-2013 at 02:21 PM.
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Old 08-13-2013, 12:11 PM   #2
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Pretty sure I did this once. My guess is you had the springs on wrong. Talliaferro had a thread on it to. Lemme search it....

https://www.saablink.net/forum/car-pr...only/31458.htm

Here ya go.
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Old 08-13-2013, 12:37 PM   #3
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i know those springs can be a bit finicky but im pretty sure mine are on the right way.

they are on like this


the weird thing is when i got the car i noticed the missing caliper spring and 1 caliper had the spring installed similiar to that link you posted (it was hanging on for dear life). But yet the car stopped perfectly fine.

in my attempt to add caliper springs i now have a soft pedal....just seems really weird! Im gonna take the caliper springs off and see if the pedal is still low.

Last edited by dasaabguy; 08-14-2013 at 12:02 PM.
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Old 08-13-2013, 03:20 PM   #4
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after reading a bunch of post....its gotta be the caliper springs TweeK!

im gonna pop em off when im off the clock and see if anything changes.

Last edited by dasaabguy; 08-13-2013 at 04:03 PM.
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Old 08-13-2013, 03:30 PM   #5
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If the springs we're screwed up for awhile, it may have chamfered your pads. But I don't think that would give you a soft pedal.
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Old 08-13-2013, 08:20 PM   #6
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Turned out to be caliper springs! I popped em off when I got off work and my pedal is back to normal.

The caliper springs were on in the correct position but maybe it didnt seat correctly or something.

Thanks for the help guys!

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Old 08-14-2013, 07:54 AM   #7
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Wait a sec, so you took the springs off and now the brakes are good?

I am trying to do the mental math as to how these would give you a soft pedal and I can't figure it. Then, how removing the spring would fix it?

I thought these were just to remove pad chatter, slap, and brake squeal. And that it wouldn't be unsafe to remove them, it just might have some undesirable consequences. Am I wrong?
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Old 08-14-2013, 07:58 AM   #8
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They keep the pad parallel and in the same position relative to the rotor. Otherwise the caliper can literally rock back and forth where the pins slide through the caliper bushings.

The brakes shouldn't work better with the spring removed.
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Old 08-14-2013, 11:49 AM   #9
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i know its weird that a lil spring could cause your brakes to go soft! I've been reading all kinds of posts of people swapping in new pads only to find their pedal goes soft once they have everything back together. So they start bleeding brakes, then they have to figure out the proper way of bleeding brakes because its a different sequence then what most are use to. The old start from the furthest point of the master and work your way to the closest doesnt apply to a Saab.

i know these lil springs are important, which is why i want to get them back on. But the brakes operate normal without them and i've done some pretty hard stops.


Quote:
Wait a sec, so you took the springs off and now the brakes are good?

I am trying to do the mental math as to how these would give you a soft pedal and I can't figure it. Then, how removing the spring would fix it?

I thought these were just to remove pad chatter, slap, and brake squeal. And that it wouldn't be unsafe to remove them, it just might have some undesirable consequences. Am I wrong?

Last edited by dasaabguy; 08-14-2013 at 11:57 AM.
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Old 08-29-2013, 01:44 PM   #10
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so i put the springs back on. Although stopping is better than before its still not as good as if i were to run without the springs.

the pedal has a bit more travel before the brakes start engaging.

maybe the pads were worn unevenly or something as a result of not having the springs on.
Its hard to describe but its almost as if the springs are putting to much tension on the caliper so that the brakes dont engage with full instant power.
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Old 11-25-2013, 04:07 PM   #11
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....so its been a couple months since my last post and my front brakes are back to normal with the springs installed.

So heres what I believe happened, previous owner did not have the caliper springs on and/or incorrectly installed for a few months. This probably caused the pads to wear unevenly. Now that the caliper springs are on correctly the pads have over time evened themselves out thus increasing stopping power back to normal.
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