zep Posted August 27, 2009 Share Posted August 27, 2009 Hey peoples, Just went for my WOF and failed on uneven rear brakes, 140 and 190, which is about 25% out on the left. What might be causing this and is there an easy fix? I'm sure it was fine last time I went for a WOF and I haven't done crap all driving since then really. Anything I should check? Got 28 days to get this done! Cheers Leon Quote Link to comment Share on other sites More sharing options...
Toucan Posted August 27, 2009 Share Posted August 27, 2009 Was that handbrake or under pedal? Quote Link to comment Share on other sites More sharing options...
kyteler Posted August 27, 2009 Share Posted August 27, 2009 Whip the pads out, give them a rub/scuff on the concrete (I'm serious) so they're "fresh" but even, slap them back in. Try again. If that doesn't work, then move on to other slightly more dramatic things. Quote Link to comment Share on other sites More sharing options...
zep Posted August 27, 2009 Author Share Posted August 27, 2009 Escorta: under the pedal/ Ky: Sweet, so I should just scuff them up a bit, or should I scuff them down until they are of even thicknesses? Quote Link to comment Share on other sites More sharing options...
Hemi Posted August 27, 2009 Share Posted August 27, 2009 i thought the brake imbalance was 30% , maybe thats just for heavy vehicles , have you pulled them apart?? , mildy leaking wheel cylinders can cause that symptom. , id take both side apart , sand down shoes and then take one show from each side and swap them over..... im serious that amount of times is managed to even up brakes doing that is stupid , its standard practice at my work before we go any further . Quote Link to comment Share on other sites More sharing options...
kyteler Posted August 27, 2009 Share Posted August 27, 2009 Escorta: under the pedal/Ky: Sweet, so I should just scuff them up a bit, or should I scuff them down until they are of even thicknesses? Nah, just scuff 'em up, no need to even them out. As long as the braking surface is freshened up, should be good. Then do a few wee braking runs before you take it into re-test. Quote Link to comment Share on other sites More sharing options...
kyteler Posted August 27, 2009 Share Posted August 27, 2009 i thought the brake imbalance was 30% , maybe thats just for heavy vehicles , have you pulled them apart?? , mildy leaking wheel cylinders can cause that symptom. , id take both side apart , sand down shoes and then take one show from each side and swap them over..... im serious that amount of times is managed to even up brakes doing that is stupid , its standard practice at my work before we go any further . Pretty sure he's disc rear, but if you're not Leon, then what he says... same shit different layout. Quote Link to comment Share on other sites More sharing options...
Black Francis Posted August 27, 2009 Share Posted August 27, 2009 yeh cylinders fail me b4 but i think leone has comodore disks or someshit dont you leone? Quote Link to comment Share on other sites More sharing options...
Hemi Posted August 27, 2009 Share Posted August 27, 2009 i thought the brake imbalance was 30% , maybe thats just for heavy vehicles , have you pulled them apart?? , mildy leaking wheel cylinders can cause that symptom. , id take both side apart , sand down shoes and then take one show from each side and swap them over..... im serious that amount of times is managed to even up brakes doing that is stupid , its standard practice at my work before we go any further . Pretty sure he's disc rear, but if you're not Leon, then what he says... same shit different layout. id be worried if disc rear end has managed to uneven itself , thats siezed calipers usually Quote Link to comment Share on other sites More sharing options...
kyteler Posted August 27, 2009 Share Posted August 27, 2009 Yeah, but that's easy enough to remedy too unless they're well fucked, which I doubt. Remove caliper, pop piston, emery the bore, clean and re-install piston, slap back in, bleed brakes, done. Quote Link to comment Share on other sites More sharing options...
Hemi Posted August 27, 2009 Share Posted August 27, 2009 Yeah, but that's easy enough to remedy too unless they're well fucked, which I doubt. Remove caliper, pop piston, emery the bore, clean and re-install piston, slap back in, bleed brakes, done. nah nah dude , talking about the caliper pins if its a float type arrangement , if the boot for the pin comes off and shit / water gets in its causes the pin ..not to slide .. etc. my l/h caliper had this prob and hava guess which one had the higher reading /locked up first Quote Link to comment Share on other sites More sharing options...
kyteler Posted August 27, 2009 Share Posted August 27, 2009 Oh yeah. Still, that's no drama really either? Remedied my mates Poolude with that problem. Quote Link to comment Share on other sites More sharing options...
Hemi Posted August 27, 2009 Share Posted August 27, 2009 Oh yeah. Still, that's no drama really either? Remedied my mates Poolude with that problem. damn just re-read my first post .. my apologees (sp?) , made that sound like its wrong and bad etc . oi pm etc Quote Link to comment Share on other sites More sharing options...
shizzl Posted August 27, 2009 Share Posted August 27, 2009 free up ya caliper slides if its disc rear.. clean them up and rub some rubber grease on them so they slide in and out real nice.. this will solve it.... and brake inbalance should allow up to 30%. but if it spikes above that at all its a fail... thats with heavys anyway,not 100% sure on light private vehicles... we have a brake machine at work, my rears pulled in a 42% on the rears= fail, so i took it to a shop with no brake roller= pass.. have since freed up caliper slides.....mint Quote Link to comment Share on other sites More sharing options...
Hemi Posted August 27, 2009 Share Posted August 27, 2009 free up ya caliper slides if its disc rear..clean them up and rub some rubber grease on them so they slide in and out real nice.. this will solve it.... and brake inbalance should allow up to 30%. but if it spikes above that at all its a fail... thats with heavys anyway,not 100% sure on light private vehicles... we have a brake machine at work, my rears pulled in a 42% on the rears= fail, so i took it to a shop with no brake roller= pass.. have since freed up caliper slides.....mint lmao you sound exactly like me . me = fuck that i aint having warrent here , tapley meter ftw! . other wise youve said just everything i already have , you work in heavy? Quote Link to comment Share on other sites More sharing options...
shizzl Posted August 27, 2009 Share Posted August 27, 2009 yup,heavy passenger... did you say grease them up?didnt see it... but yeah,love having the brake rollers at work.. used them to check the loaded weight of my trailer with the stockcar on it... Quote Link to comment Share on other sites More sharing options...
Hemi Posted August 27, 2009 Share Posted August 27, 2009 yup,heavy passenger...did you say grease them up?didnt see it... but yeah,love having the brake rollers at work.. used them to check the loaded weight of my trailer with the stockcar on it... nah was referring to what you told him to do etc . so buses? yea brake rollers rule bar warrent time. Quote Link to comment Share on other sites More sharing options...
Bling Posted August 27, 2009 Share Posted August 27, 2009 For disc rear end i've managed to get away with scuffing the pads/ discs up, but next time that didn't work so took the calipers in and got them checked over / regreased whatever for like $40 and they are perfect now. Quote Link to comment Share on other sites More sharing options...
mx_freak69 Posted August 27, 2009 Share Posted August 27, 2009 Light vehicles tis 20% max imbalance. Agree with scuffage of pads if disc rear. If drum, scuff shoes and drum friction surface and swap drums side to side. Too easy. Quote Link to comment Share on other sites More sharing options...
zep Posted August 28, 2009 Author Share Posted August 28, 2009 Alright, I'll give them a scuff and see what happens when I take it back in. I wonder if a local garage will check the balance for me for free... Also have to change the steering coupling which is going to be a pain in the ass! Quote Link to comment Share on other sites More sharing options...
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