moshem74 Posted July 6, 2005 Share Posted July 6, 2005 hi i changed all the front breaks last week, the mechanic open the front wheels and took out the caliper of both sides ,took out the old breaks and put me a new set. now, he didnt touch the oil breaks at all.when i asked him, he told me that he dont need to touch the oil breaks at all. after i went home and from than, i feel that the car its hard to stop, i need to press hard on the breaks, i calld him and he told me that because the breaks are new and the plates are new, it will take some time till they will work good...is it true? also he change me a new plates of both sides. can he change all the front breaks without touching the oil breaks? thank you all. moshe. Link to comment Share on other sites More sharing options...
MilesFox Posted July 6, 2005 Share Posted July 6, 2005 did he turn the pistons on the calipers to recess them, to allow room for the new pads? the parking brake is on the front calipers and the pistons must be turned because of this design suppose that is why the old ones have been replaced because the last mechanic didnt do the same thing also if the brakes are now with new rotors, the film of protective oil on the rotors needs to be cleaned off with brake parts cleaner. the rotors should have a non directional finish, they should have been sanded to scuff them up if they are turned, or new if they didnt come sanded. also new pads its a good idea to burnish them in, make a run a nd a hard quick stop to burn the surface off the pad to expose fresh material Link to comment Share on other sites More sharing options...
moshem74 Posted July 6, 2005 Author Share Posted July 6, 2005 how long it takes till the breaks peds will sit in there place? Link to comment Share on other sites More sharing options...
MilesFox Posted July 6, 2005 Share Posted July 6, 2005 the brakes should work as soon as you install them. my bet is the guy pushed the pistons in with a c-clamp and broke the calipers Link to comment Share on other sites More sharing options...
moshem74 Posted July 6, 2005 Author Share Posted July 6, 2005 if the caliper is broken, how should i see it or how would i know it? about the hand break, its work fine , after he replace the front breaks he adjest it. also , whan i press the breaks let say in the light, after, i release the breaks,i hear the noise like 2 stones touching togetter =good noise that tell you that the breaks are fine. what should i do now? Link to comment Share on other sites More sharing options...
MilesFox Posted July 6, 2005 Share Posted July 6, 2005 maybe he didnt bleed the system properly. the parking brake working is a good sign so lets rule out the piston idea sorry i didnt think of this forst, but since the calipers have been replaced the brake lines have been disconnected. subarus are tricky to bleed even for experienced mechanics, even for myself tell the mechanic its a dual diagonal brake system, and see if he will re-bleed the system starting from the wheel farthest from the master cylinder. he should be familiar with this practice also its best to use a foot long lencth of clear hose and a jar to watch for any air. just be sure to let him know that subarus are tricky to bleed, its not to say hes not a good mechanic, but to say thats just how these cars are and can be rather particular for someone who doesnt see a lot of subarus Link to comment Share on other sites More sharing options...
moshem74 Posted July 6, 2005 Author Share Posted July 6, 2005 "brake lines have been disconnected" the brakes - the mechanic didnt disconnect no line....he did all with connected lines. why the brake become spongi, or why do i need to press hard on the brakes? Link to comment Share on other sites More sharing options...
MilesFox Posted July 6, 2005 Share Posted July 6, 2005 have him go and bleed the brakes anyway. suppose there is not enough brake fluid. just tell him you want to flush oput th ebrake system, with new fluid. brake fluid is hygoroscopic, which means that it will absorb moisture over time. moisture in the brake lines can boil into steam in extreme conditions such as mountain driving or racing where the brakes become very hot, although this is not your case. another point is moisture in the lines will promote corrosion and rust out the brake lines fom inside out flushing the brake system willbleed out any air and promote the life of the brake lines so what you are saying is he dismounted the caliper and just hung it out the way, without disconnecting the line? the only thing i can think of air getting into the system is the brake fluid was low enough, that after the brake pads wore down so much, that it may have drained out the master cylinder enough to suck in an air bubble. and when the mechanic intalls new pads the pistons being turned/pushed in will push the brake fluid back into the master cylinder, but the bubble would have worked its way hro the line 2 main points i stress is ask the mechanic if he turned the pistons in(most likely did if the parking brake is working good) and ask him if he will bleed the brakes for you, pretty much change the fluid. print this thread out and take it to him so he understands what your concerns are Link to comment Share on other sites More sharing options...
moshem74 Posted July 6, 2005 Author Share Posted July 6, 2005 there is a pipe that going from the booster to the engine, maby this pipe need to be changed? Link to comment Share on other sites More sharing options...
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