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Old 12-08-2002, 06:52 PM   #1
setiawani
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Question Rotor hang loose

This morning I decided to check on my pads and clean the brake while at it. When I took the wheel off, I've notice that my rotor move a bit ?? Then I continue to unscrew the top bolt and the brake line bolt. When the caliper opens up, I pull out both pads and suddenly my caliper just hang there loose. If I took the caliper out all the way, the caliper would just fall out. Is this allright ?? I thougt caliper are supposed to be tight with the will hub and not moving ?? Well, I did clean the whole brake component and put them back together. I make sure the wheel are on tight, and did a test drive. (I just did the front left). After warming up the pads (driving around for 15 minutes and constantly applying the brake) I did a few stop test. I tried stopping from 35/45 to 0mph. I feel the car is pulling to the right, could this because the left brake is clean and the right is dirty so that the left work better ??? Another thing I notice is that my ABS comes on early. Last track event (Taste of Subaru) I can go from 90mph - 30mph threshold brake without ABS to activate. I am just worried something is wrong with my brake.... Any suggest what I should do ???

Thanks
I
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Old 12-08-2002, 08:45 PM   #2
North Ursalia
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Your wheel essentially holds the rotors on, and the rotors turn with the wheel. The calipers use 2 bolts and are bolted to the knuckle firmly. The rotors will move with the wheel off, especially with no pads in the caliper.


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Old 12-08-2002, 09:59 PM   #3
setiawani
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So this is ok ?? Well I am just curios because I have replace brake pads on many different car, honda, bmw, mitsubishi, etc but none of this car rotors come loose when the pads are out.
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Old 12-08-2002, 10:23 PM   #4
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Let's make this clear -

The rotor hangs loose against the 5 wheel bolts. It's hold on to the hub by the wheel.

The bracket is bolted tight to the hub.

The caliper is bolted to the bracket, via two 14mm sliding pins. After you put the pads back in, tightened these two bolts, the caliper can, and will, still slide laterally - until you pump the brakes again to press the pistons against the pads.

-Ray
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Old 12-09-2002, 01:30 AM   #5
Patrick Olsen
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Default Re: Rotor hang loose

Quote:
Originally posted by setiawani
After warming up the pads (driving around for 15 minutes and constantly applying the brake)
That is a really, really bad thing to do to your brakes. Never, ever drive with the brakes continuously applied!

Quote:
Originally posted by setiawani
I tried stopping from 35/45 to 0mph. I feel the car is pulling to the right, could this because the left brake is clean and the right is dirty so that the left work better ???
If the left brake was working better, the car would pull to the left. Were you on a perfectly flat road? Often the crown of the road will tend to pull the car to the right.

Quote:
Originally posted by setiawani
Another thing I notice is that my ABS comes on early. Last track event (Taste of Subaru) I can go from 90mph - 30mph threshold brake without ABS to activate. I am just worried something is wrong with my brake.... Any suggest what I should do ???
Conditions change. How hot was the pavement at Taste of Subaru? How hot were your tires? Compare that to your most recent "test". Were the conditions exactly the same? If not, then it shouldn't come as a surprise that your ABS activates at a different threshold - you have a different amount of grip now.

What should you do? Go buy a Haynes Manual so you can figure out what you're doing before you touch your brakes again.

Pat Olsen
'97 Legacy 2.5GT sedan
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Old 12-09-2002, 06:01 PM   #6
setiawani
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I am just confused of one thing, why is my rotor is loose when the pads are out, and basically the rotor bracket is what kept the rotor from falling out. I just replace my dads car (mitsu galant), which I did exactly the same thing, take the tires off, take the top bolt of the caliper and pull the pads out. The rotor on my dads car, and also every other car that I have replaced the pad, the rotor seems to be bolted to the hub and static, not moving. But the rotor just went hangin when pull the pads on my rex.
Is this normal for WRX ?? how about the rear ??
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Old 12-09-2002, 06:16 PM   #7
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They are all the same. Front, rear, WRX, Legacy, Forrester. Like Pat and I said again and again, the only thing that holds the rotors in place is the wheel. Once your wheel is off, the rotor is loose.

-Ray
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Old 12-09-2002, 06:48 PM   #8
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setiawani: I think you have limited experience. I have replaced brakes on a couple different vehicles and although some were tight and had to be removed with a bolt (to push it off the hub) ALL OF THEM had a "floating" rotor as you describe. Nothing unusual
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Old 12-09-2002, 06:50 PM   #9
setiawani
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Quote:
although some were tight and had to be removed with a bolt (to push it off the hub)
This explain all I needed to know. Thank you guys.
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