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Vibrating brake pedal...

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Offline wildgoody

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Re: Vibrating brake pedal...
« Reply #15 on: May 27, 2004, 08:15:55 PM »
After wheeling, I'd say mud in the rim
or somthing like that, but I would hope
you caught that when the brake rotors
and disks were turned.

Could the machine shop screwed up
and turned them crooked ???

Just some thoughts

Wild
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Offline Bobzooki

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Re: Vibrating brake pedal...
« Reply #16 on: May 28, 2004, 01:37:03 AM »
I wonder if your proportioning valve is flaking out?  Seems to be the only "active" part of the brake system you haven't touched.
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Offline trackermad

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Re: Vibrating brake pedal...
« Reply #17 on: May 28, 2004, 02:08:32 AM »
My sister had a recurring problem like you have.  It turned out that every time she had her tires changed the mechanic would over torque the lug nuts and warp the rotors.  It took us a while to realize what was going on but once we insisted on mechanic use a torque wrench and not an impact the problem stopped.  

Patrick
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Offline wiretap_MD

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Re: Vibrating brake pedal...
« Reply #18 on: May 28, 2004, 02:14:43 AM »
wildgoofy:  Yup you may be right.  That's why I decided to change the front rotors to a brand new set.  Still the problem persists

Bobzooki:  Hmmm..that's something worth checking.

Patrick:  That could be a good point however I changed my front rotors to a brandnew set already and still it persists.
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Offline trackermad

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Re: Vibrating brake pedal...
« Reply #19 on: May 28, 2004, 03:07:03 AM »
There's a chance that one of your hub flanges is bent.  If you can get your hands on a runout dial indicator.  if you cant find one a piece of stiff wire may work.  Find a place to bolt one end and with the rotor or drum off bend the wire until it is just touching the hub on the face.  (mark your start point)  Rotate the hub and see if your clearance changes.  (for good measure id do this from a couple start points)  If the hub is out enough to make the breaks hump then you should be able to see it using this method.  
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"First of all: what is work? Work is of two kinds: first, altering the position of matter at or near the earth's surface relatively to other such matter; second, telling other people to do so."  ~Bertrand Russell
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Offline wiretap_MD

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Re: Vibrating brake pedal...
« Reply #20 on: May 28, 2004, 07:49:26 AM »
trackermad:  I'm not familiar with a hub flange. Could you care to explain what it is? Thanks.
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'01 Sidekick: OME-Calmini Hybrid Suspension, 1.5-inch spacers, Bilstein 5125 re shocks, 2-inch bodylift, 30x9.5 BFG, Safari Snorkel, ARB bumper, Custom rear bumpe
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Offline wildgoody

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Re: Vibrating brake pedal...
« Reply #21 on: May 28, 2004, 10:16:22 AM »
Wildgoofy  >:(  I'm might just go back to "Wild"
and crash the server again  :P

Wild
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Offline wiretap_MD

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Re: Vibrating brake pedal...
« Reply #22 on: May 28, 2004, 12:10:08 PM »
wildgoody:  Ooops..my apologies man.  Typo.
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'01 Sidekick: OME-Calmini Hybrid Suspension, 1.5-inch spacers, Bilstein 5125 re shocks, 2-inch bodylift, 30x9.5 BFG, Safari Snorkel, ARB bumper, Custom rear bumpe
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mperry

Re: Vibrating brake pedal...
« Reply #23 on: May 28, 2004, 05:13:48 PM »
Quote
I noticed these problems right after I did some offroading in our mountain ranges here which included about 6 short river crossings.

Then I changed my rear brake shoes.  I noticed that the problem disappeared for about 2-3 days only for it to resurface once more.  During those 2-3 days, all I did was city driving.


I just noticed this message. It is possible that one of the shoes are dragging, overheating the drums. You could have them checked again. Also check the drums for any hairline cracks. (They are hard to see sometimes.) Occasionally you'll get warping of rotors, or cracking of drums, if they are very hot then immersed.
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Offline wildgoody

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Re: Vibrating brake pedal...
« Reply #24 on: May 29, 2004, 07:21:32 PM »
Quote
wildgoody:  Ooops..my apologies man.  Typo.


:) I know, but I had to rub it in
;D

Wild
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Offline xontros

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Re: Vibrating brake pedal...
« Reply #25 on: May 30, 2004, 11:32:32 AM »
Had the same problem for a year or so. Thought it was due to warped rotors and replaced them, but problem persisted and blamed possible incorrect installation of rotors. Vibration was felt on the floor and on glove box at certain speeds.  >:(

Turnd out to be a wheel balancing problem, although I checked it at least 3 times during last year. The 2 most balanced wheels were put in front, and everything was perfect again.  Only expanation for me is that sometimes wheel balancing equipment is not properly calibrated.  ???
« Last Edit: May 30, 2004, 11:36:15 AM by xontros »
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Offline wiretap_MD

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Re: Vibrating brake pedal...
« Reply #26 on: May 31, 2004, 12:26:45 AM »
Here's an update:  

I went to my friend's shop that had a lifter.  Followed mperry's suggestion.  Localized the problem to the rear brakes.  Swapped the brake drums of my friend's Vitara and installed it in mine.  Installed mine in his as well then we did a test drive.  My vibration disappeared whereas he felt the problem in his brake pedal this time.  Conclusion:  it was my brake drums that were warped.

So I went over to the shop where I had it previously refaced and had them re-reface it all over again.  So far, things are running smoothly.  Hope thats the end of it.  Just wanted to thank you guys for all your inputs.
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'01 Sidekick: OME-Calmini Hybrid Suspension, 1.5-inch spacers, Bilstein 5125 re shocks, 2-inch bodylift, 30x9.5 BFG, Safari Snorkel, ARB bumper, Custom rear bumpe
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Offline wiretap_MD

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Re: Vibrating brake pedal...
« Reply #27 on: May 31, 2004, 12:33:36 AM »
By the way, just wanted to share with you guys a few links with pictures of our offroad sorties.

http://www.pbase.com/zukiarkitek
http://www.pbase.com/deltarecon
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'01 Sidekick: OME-Calmini Hybrid Suspension, 1.5-inch spacers, Bilstein 5125 re shocks, 2-inch bodylift, 30x9.5 BFG, Safari Snorkel, ARB bumper, Custom rear bumpe
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mperry

Re: Vibrating brake pedal...
« Reply #28 on: June 02, 2004, 01:08:04 PM »
Quote
Here's an update:  

So I went over to the shop where I had it previously refaced and had them re-reface it all over again.  So far, things are running smoothly.  Hope thats the end of it.  Just wanted to thank you guys for all your inputs.


Kewel.  ;D I'd guess that's it for that prob.

If the prob should happen again, I'd suspect one of the rear shoes isn't releasing.

That can be from driving w/ e-brake on, a rusted/kinked cable, binding in the hydraulics (sometimes a wheel cylinder), or hydraulic pressure not releasing. That last was a bear to find on a VW. One of the hoses was deteriorated.
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