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Old 06-05-2010, 09:19 AM   #1
WuNgUnSVT
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Help! Serious brake drag...can't fix!!

A few weeks ago, I noticed my wagon was occasionally being sluggish...fast forward to last week, and I notice serious brake dust accumulating on the front right wheel!

I go for a test drive, pull over, and the rim is quite warm from the rotor heating it up!

So last weekend, I put the car up in the air and do some front brake maintenance...

Clean the pad tracks
Clean and lube the slider pins (extreme pressure grease)
Apply anti-seize on the pad tracks and clips

Well, it didn't seem to help the problem brake! So today, I put it back up in the air...
Slider pins were really stuck in the calipers!! So I pull them out, degrease it, and use a lighter, lithium based 'engine assembly lube' on them instead...
I also replaced the rubber brake line, just in case it was pinched.

I pumped the brakes to extract the piston to look for corrosion/dirt, but the boot is in good shape and the piston was clean...

I re-assembled the brake and tested it in drive...the rotor spun just fine off the brakes...

So I go for another spin down the highway...seemed okay. Until I pulled over to feel the rim...and again, it was hot!!!! Smelled burnt too...

WTF!!?!?

Tested some heavy braking at highway speed, and some serious pulsing, thudding from that front rotor!

Why is it doing this!?!?!

The pads are healthy, maybe 30% worn...

For some reason, the piston isn't retracting or the caliper isn't sliding on the pins...
Why!?!

Anyone, please help!!


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Old 06-05-2010, 09:37 AM   #2
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1) You need what is called "brake parts grease" it is a special grease that is designed to stand up to the high temperatures of being on a caliper. Don't use any other type of grease as it could solidify and lose it's lubrication. This is sometimes called caliper slide grease depending on your parts store.


2) It's likely that won't fix it. Your problem is most likely to be a stuck caliper. You can try cleaning the caliper, and using- very lightly- brake parts grease on the outside edge of the caliper. Wipe on- wipe off, then without pads pump the brakes a couple of times to extend the piston. Pop the cap (if it's not already off), push the piston back in, wipe off excess grease, and put your pads back on with anti-squeal on the backs. That might fix it and save you the cost of a caliper. If not- you need a new caliper.
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Old 06-05-2010, 09:44 AM   #3
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Canadian Tire has a sale on for calipers...I think I might just grab one...and hope this fixes it!!!

I'll have to ask about the grease, 'cause I couldn't find any brake specific stuff last time I was there...
Thanks!!
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Old 06-05-2010, 09:55 AM   #4
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Keep looking or order some from another parts store if not available where you live. Nothing else will do from what I understand, and I think you already learned that by experimentation.
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Old 06-05-2010, 10:53 AM   #5
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With it running hot and dragging, I would check that rotor for being warped now. Doesn't take much sometimes.
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Old 06-05-2010, 11:23 AM   #6
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Got a new caliper (remanufactured) for $70 with a $40 core exchange...not even worth doing maintenance on 'em!! Just replace them!
Anyways, car feels peppy again and no brake drag!!

I wonder if they have SVT rears on core exchange? :)
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