Jphua Neutral Newbie September 4, 2011 Share September 4, 2011 hiz guys, encounter something which caught my attention. as refer to the pic attached below, tis area is the connection between your brake hose to the caliper itself. the chip off area is around/outside the threaded part. From wad i know, tis is a 2nd hand brake kits. 2nd user only use for daily street driving & no tracking. I would like to ask the bros/sis here: 1) anybody knows wad causes the damage, due to- a) hard braking b) normal wear & tear issue due to long usage c) OR any others reasons? Until now it still puzzled me. [confused] Perhaps other bros have met tis kinda of cases b4, can kindly enlighten me. many thanks in advance for all the input. chip off pieces damaged area ↡ Advertisement Link to post Share on other sites More sharing options...
ER-3682 Twincharged September 4, 2011 Share September 4, 2011 Maybe the mechanic used the wrong type of wrench to open the brake hose.?? Link to post Share on other sites More sharing options...
Jphua Neutral Newbie September 4, 2011 Author Share September 4, 2011 Maybe the mechanic used the wrong type of wrench to open the brake hose.?? it looks real bad damage but i did not witness any of the installation or uninstall of the caliper. poor installation could be Link to post Share on other sites More sharing options...
Aeromania 1st Gear September 4, 2011 Share September 4, 2011 When does damage take place? was it damaged when it was on your car or out of your car? Is it stock caliper or aftermarket? Link to post Share on other sites More sharing options...
Jphua Neutral Newbie September 4, 2011 Author Share September 4, 2011 When does damage take place? was it damaged when it was on your car or out of your car? Is it stock caliper or aftermarket? tis is brembo black caliper for STI's stock brake. it was sent to the workshop to check the brake kits as it was reported the brake did not bite. this brake behaves worst like a stock brake. mechanics tested it out & pump the brake, some unwanted noise can be heard. out of sudden, pressure gone, brake fluid oozing out from the caliper. mechanics take out the caliper & found tis crack. besides installation or wear & tear, i cant think of any others logic. bro Aeromania, u know something abt tis case? can enlighten me? Link to post Share on other sites More sharing options...
Johnnyx1257 Neutral Newbie September 4, 2011 Share September 4, 2011 That's in bad shape not rly to sure what could have caused that Link to post Share on other sites More sharing options...
Ken4555 1st Gear September 4, 2011 Share September 4, 2011 (edited) maybe the calipers were involved in a major accident which damaged the calipers... by the way stock STI brembo brake calipers are gold?... sorry i didnt know got black... cause your pic looks chrome... at 1st i thought ex owner send for chroming or metal polishing? this weakens any metals... just realised you said its black... Edited September 4, 2011 by Ken4555 Link to post Share on other sites More sharing options...
Good-Carbuyer 1st Gear September 4, 2011 Share September 4, 2011 Safety first. Replace them if not yet done. I believe you are worth more than the cost of the replacement. Link to post Share on other sites More sharing options...
Patricklyb Clutched September 4, 2011 Share September 4, 2011 first......how long is your ride and is the caliper stock that come with ride? from what i see from the broken parts it seen to have broken deal to age..... cos i think the materials is cast iron and when in contact with heat,it will weaken the strenght of cast iron. and when opening the hose for brake lining it cracks. unlikely it it wrong tools that cos as the hose normaly discontinue with 12 or 14 open spanner! just my 01 cent..... Link to post Share on other sites More sharing options...
ER-3682 Twincharged September 4, 2011 Share September 4, 2011 Brake hose CANNOT remove by open end spanner,it needs a special spanner,it looks like a ring spanner with an opening gap. Link to post Share on other sites More sharing options...
Patricklyb Clutched September 4, 2011 Share September 4, 2011 Brake hose CANNOT remove by open end spanner,it needs a special spanner,it looks like a ring spanner with an opening gap. it is call Double open-end spanner! Link to post Share on other sites More sharing options...
Slowpoke 3rd Gear September 4, 2011 Share September 4, 2011 someone probably over-tightened the hose, that weakened the threads and when pressure applied.... kaboom Link to post Share on other sites More sharing options...
Watwheels Supersonic September 5, 2011 Share September 5, 2011 (edited) Brake calipers are hydraulic action activated device so anything to do with hydraulics the weak link is always the seal( in this case in between the hose connection and caliper). Over time due to fatigue and wear the seal can harden and crack. And for things like brake calipers the hydraulic hose is subjected to immense pressure, vibrations and heat. Once the seal starts failing the seal area around the connection which we see in the pics starts to experience more vibrations and small cracks starts to form around it. Left unattended the small cracks will grow to become bigger ones. It's common for hydraulics to fail when the seals fail, common symptoms are the usual loss of pump pressure, not working at 100% feel, funny/weird sounds caused by vibrations. Brake calipers need to be maintained cos there are other seals in the pistons too depending on how many "pots". The so call recond are just overhauling , cleaning and changing of seals. Edited September 5, 2011 by Watwheels Link to post Share on other sites More sharing options...
Yeobh 4th Gear September 5, 2011 Share September 5, 2011 (edited) Simple open end wrench/spanner may not work well as the jaw tend to" open up" when under heavy turning force and may cause slip and damage to the hex nut. PS Insert photo of a Flare Nut Spanner with Flexi-head veryuseful where access is restricted. Flexi head 14mm Bi-hex and single hex Chrome Vanadium Allows access Edited September 5, 2011 by Yeobh Link to post Share on other sites More sharing options...
Yeobh 4th Gear September 5, 2011 Share September 5, 2011 From the photo and yr description leading to brake fluid leak , my conclusion is the brake female fitting threads are damaged due to cross threads. Most likely is due to inexperience mechanics trying to fit the flared male fitting to the thread hole without success and end up using force resulting in cross threads. The thread were pull off when the brake fluid built-up hydraulic pressure because of poor thread contacts ( cross thread). Very poor mechanical skill and definelty using improper tools. If this poor workmanship work does result in a road accident, in countries like US Uk or Aust, the insurance company will defintely arrow the shop owner.But here cars owners bear the cost to provide training for those grease monkeys !! Link to post Share on other sites More sharing options...
Jphua Neutral Newbie September 5, 2011 Author Share September 5, 2011 thanks bros for all your input. tis brake kits i bought it 2nd hand frm a guy in forum.only me to blame for not checking. (not to flame anyone/parties) tis brake kit used to be the stock brake for wrx or sti (HB), tat's wad i know. the gold brembo caliper i think is for previous model, TS maybe. any bro can correct me? i agree tat tis kinda of damage might due to long time wear & tear situation, in fact i do not know how long the seller have for tis brake or whether he track a not. though i still have some questions in mind, hopefully some bros here can enlighten/share with me. 1) normally, wad's the life span for the brake kits like tis? 2) wad's the interval range to service/overhaul the caliper? 3) does tis caliper produce metal squeal sounds during low speed braking & ESPECIALLY reverse parking braking? during reversing, the sounds is unbearable, is tis normal? many thanks in advance have a nice day bros Link to post Share on other sites More sharing options...
Jphua Neutral Newbie September 5, 2011 Author Share September 5, 2011 maybe the calipers were involved in a major accident which damaged the calipers... by the way stock STI brembo brake calipers are gold?... sorry i didnt know got black... cause your pic looks chrome... at 1st i thought ex owner send for chroming or metal polishing? this weakens any metals... just realised you said its black... i'm not too sure abt the gold brembo but i have seem many TS ride using gold brembo. they said black 1 is for the sti hatchback version. the brake kits is damn new as wad the seller claim. so i didnt suspect much. kinda of bad luck sigh... Link to post Share on other sites More sharing options...
Jphua Neutral Newbie September 5, 2011 Author Share September 5, 2011 Safety first. Replace them if not yet done. I believe you are worth more than the cost of the replacement. thanks bro. current brake kit have been re-work with some welding done. so far of the ride still alright. braking is there juz tat i wont drive tat fast like i used to be. safety 1st. ↡ Advertisement Link to post Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In NowRelated Discussions
Related Discussions
What brake pad U choose for your car? Cheap? Good? Genuine ?
What brake pad U choose for your car? Cheap? Good? Genuine ?
Brake Pads
Brake Pads
'Town council rejected compensating me': Driver at loss after Volkswagen damaged by spalling concrete at Tekka Centre carpark
'Town council rejected compensating me': Driver at loss after Volkswagen damaged by spalling concrete at Tekka Centre carpark
VW Touran Fault Code: Brake Servo Failure
VW Touran Fault Code: Brake Servo Failure
Brake squeak every morning
Brake squeak every morning
2014 Jetta Brake Servo Failure
2014 Jetta Brake Servo Failure
Brembo Debuts Light-Up LED Brake Calipers
Brembo Debuts Light-Up LED Brake Calipers
Hand Brake vs Foot Brake vs Flap Brake (aka EPB aka Electronic Parking Brake)
Hand Brake vs Foot Brake vs Flap Brake (aka EPB aka Electronic Parking Brake)