Sam92 New Member 5 Member For: 7y 8m 23d Posted 28/04/17 11:57 PM Share Posted 28/04/17 11:57 PM Hey guys, not sure if this is the right spot to post or not but I recently bought a xr6turbo and the brakes are sticking. Im allready aware that it is quite a common problem on ba / bf models that the brake boostee bolt is too long and and needs to be adjusted to stop the piston constantly touching the master cylinder. My problem is even after changing my rotors (which had heat spots all over them) and adjusting the brake booster rod back in, im still getting the notorious shudder, however its not nearly as bad as it was. Ps the brake booster rod is adjusted in as far as it phyiscally go's. Sooo im running out of options. Should I just replace the booster section itself or is there another work around or fix? Any help would be greatly appreciated. Cheers, sam. Link to comment Share on other sites More sharing options...
skidxr6t skids Donating Members 2,754 Member For: 12y 23d Gender: Not Telling Posted 29/04/17 12:26 AM Share Posted 29/04/17 12:26 AM (edited) have fun, I took my ba to so many shops and they all mis diagnosed it........to save you some time and FUN: the rubber diaphrams in the boosters can fail and the pedal still feels normal. Eventually got to one brake shop that said they are doing 1-2 boosters a week on b series falcons. you could also have soft bushings in the front end, like the lower control arm bushing causing the shudder. but if the brakes are sticking on you'll definitely get shudder, I remember this scenario in my old BA MK2. Edited 29/04/17 12:27 AM by skidxr6t Link to comment Share on other sites More sharing options...
Sam92 New Member 5 Member For: 7y 8m 23d Posted 29/04/17 12:54 AM Author Share Posted 29/04/17 12:54 AM Yes the amount of times ive had to repeat myself to different mechanics saying that its not the calipers or the rotors that's causing the problem... I feel like im running out of problems, last resort would be changing the booster itself. Yeah I thought the same thing with the control arms but after jacking up the car when getting home from a drive, you try turn the wheels and can feel it holding it. After putting my foot on the brake a couple of times releasing the air left in the booster I can turn it freely Link to comment Share on other sites More sharing options...
HI PSI Member 1,586 Member For: 18y 7m 26d Gender: Male Location: Central Queensland Posted 29/04/17 01:45 AM Share Posted 29/04/17 01:45 AM Wheel bearings? 1 Link to comment Share on other sites More sharing options...
Sam92 New Member 5 Member For: 7y 8m 23d Posted 29/04/17 03:28 AM Author Share Posted 29/04/17 03:28 AM Ill jack it up and check if there is any play, although this problem never occurs on a shorter drive... only ever seems to kick in after ive been driving for atleast say half an hour, or have been using the brakes. Definately feels brake related anyway. Thanks for suggestion though ill have a look into it Link to comment Share on other sites More sharing options...
skidxr6t skids Donating Members 2,754 Member For: 12y 23d Gender: Not Telling Posted 29/04/17 05:05 AM Share Posted 29/04/17 05:05 AM (edited) good point hi psi, the sticking brakes cooks the bearings.. also sam that sounds more and more like my BA...only happened after driving for about half an hr or heavy braking Edited 29/04/17 05:05 AM by skidxr6t 1 Link to comment Share on other sites More sharing options...
Sam92 New Member 5 Member For: 7y 8m 23d Posted 29/04/17 05:53 AM Author Share Posted 29/04/17 05:53 AM Ok just jacked it up after driving the car for a bit and the shudder started. Both sides of the car feel really tight, not loose in the slightest.... I turned the wheels while they are both off the ground and its quite hard to turn. Concidering ive allready backed the booster bolt all the way off, I think skidxr6t might be on the money. Might just change the brake booster and see how I go ? Link to comment Share on other sites More sharing options...
4321 Bronze Donating Members 257 Member For: 10y 9m 25d Posted 29/04/17 06:34 AM Share Posted 29/04/17 06:34 AM Go for a drive to get the brakes hot, then with two people (dont try it on your own) park it on a slight hill, take it out of gear, hand brake off & see if it rolls ( it should ) now with someone behind the wheel open the bonnet & with a 13mm spanner lossen the master cyl. If the car starts to roll youvé worked out the sorce of the problem Don't think because the frount bearings (hubs) are tight that there ok Remove the rotors & spin them by hand- if there's noise or you feel roughness - change them they relativly cheap and a consumable item (they dont like potholes or being bashed into gutters as well as they wear out with age. A crook hub will give the exzact problem you have but not the brake dragging Hope this helps Link to comment Share on other sites More sharing options...
OZYWALKER XR50T Gold Donating Members 2,795 Member For: 11y 8m 19d Gender: Male Location: Western Sydney Posted 29/04/17 10:11 AM Share Posted 29/04/17 10:11 AM Really sounds like worn out caliper slide pins. The standard brakes will "stick" if the slides are worn as they don't run true. They're a consumable part and chances are they've not been replaced. Link to comment Share on other sites More sharing options...
Sam92 New Member 5 Member For: 7y 8m 23d Posted 04/05/17 10:13 PM Author Share Posted 04/05/17 10:13 PM (edited) Hey guys thanks for all the input and suggestions. Ive since replaced the brake booster with a refurbished one and so far my brakes are feeling a lot better, ill give it a good run and post the outcome. Cheers Xr50t, I had the slide pins checked by a mechanic to be sure before changing the booster, I was told they are in "good working order" and I have to admit the calipers themself seem very tidy, possibly allready been replaced by previous owner. Edited 04/05/17 10:13 PM by Sam92 Link to comment Share on other sites More sharing options...
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