disc brake rotor not in the centre
My driver side front disc brake rotor has less outside clearance than the inside one. The out side clearance is < 1 mm. What could be the reason ? All other components looks good and in place. I appreciate your help. Thanks, Bob
I'm not sure what you're talking about exactly. Are the pads wearing more on one side than the other? Is the venting clearance between the pads different side to side? Is the thickness to the rotor vents different from inner to outer? Do you have rotor run-out?
Hi Adam, Thanks for the reply. please see the attached picture. ( I used a picture from Jim's site, Thanks Jim) In order to make the clearances equal on both sides, I put 2 mm washer on upper and lower 17 mm bolt as shown in the picture. I don't see any disadvantage of using washer, but my concern is why the gaps are not equal in the first place. Thanks, Bob
I forgot to mention that the picture in above post is for illustration only as it is originally shows passenger side view and I have problem on driver's side.
Firstly, I would not recommend putting a washer that isn't meant to be in the braking system there. Secondly, it does not appear to be a critical dimension so there is no reason to take the risk. It's hard mounted and still a much larger gap than the venting clearance between the pad and rotor. So don't worry about it, take the washers out and torque it to spec. Only worry about it if there appears to be contact.
like to help not sure i understand what you are asking- when you say "clearance" you mean from where to where? from the outside of the rotor to the wheel? is it draging when you have the wheel on? did you check the clearance on the other side to see if the specs match up? that may be normal clearance based on wheel size and rim depth. have the rotors been cut on that car? if so they may have cut more on the inside due to bad grooving. another thing- the rotor may just be warped- it happens more often then you think especially if wheels are torqued too high. let me know how it goes. make sure your bracket bolts are in corectly- not cross threaded- and tight
you got a good pic there! ok so i completly agree with adam- i have done hundreds of brake jobs and was always taught not to add any shims anywhere. a new set of pads will change the clearance- unless you have done them recently. you may just have uneven wear or slightly warped rotors. hes right though if they bolt down tight and arent grinding or touching anywhere, you dont have a real problem- why does no one respond to me? is it because i am a girl_lol- i have years of experience, finishing my degree right now and am ase certified! listen to me damn it! jk guys good luck!
lol, My guess... I don't know... We're a fairly ignorant forum here so you may be right....
The only place for any discrepancy in the clearance is at the hub bearing. It's likely that someone has had the rotor off and replaced the bearings. There are lots of reasons why things might not line up - worn spindle, wrong bearing, wrong retaining washer, etc etc. Pull the rotors off both spindles and start fresh. It's not something to mess around with.
I understood him to mean the clearance from the caliper housing to the rotor. Measuring to the pads isn't too helpful I guess, since they will wear as needed and the caliper housing should shift on the posts accordingly. By the time most ppl need brakes, nothing is centered anymore.
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