Focus Fanatics Forum banner

WHY does caliper scrape rim ?

36K views 29 replies 13 participants last post by  Geezer  
#1 · (Edited by Moderator)
[?|]Cant figure out why my left front brake caliper scrapes on the wheel rim ? the bearing is tight and doesn't move around with bars and wedges ,visually cant see if it is worn out ([shameful]), Do I "change the hub "and hope for the best" [dunno]"? Has this happend to your Focus ? theirs not much clearence between the (Inside rim) and the Back of the brake caliper and the caliper started scraping on the front inside the wheel rim in certain places ,(Loud oh ye ) does anyone know what is going on with this,can some one help with this thing ?
Thanks Pablodidit


wow, thats a bit easier to read
 
#2 ·
There are only a few reasons (i can think of) that the caliper would hit the rim; Wheel bearings fried, bent wheel, loose bolts, damaged hub, improper wheel size for the brakes. Did you have the car off the ground when you wiggled the wheel? It might be a dumb question but I don't understand the bars and wedges comment.
I have seen this before and it is usually the bearings.
 
#5 ·
]No aftermarket wheels, and i had the car off the ground whiles a chekin the bearing with the long bar used for leverage ,I don't have special Gage tool used to check disc/hub run out with a maximum aloud reading of 0.002 inch .SO I'm just using old school methods ,maybe i should just change the hub n bearing ?
 
#7 ·
1/2 in to make it sit flush/

With the brake caliper bolted on it seems like it flaps around ,like it doesent fit real tight to the hub ,hard to explain in witting,after it's bolted on you can push the caliper 1/2 in to make it sit flush/snug on the hub,that's about all i can say about it ,
THANKS[chair] RICK
 
#9 ·
With the brake caliper bolted on it seems like it flaps around ,like it doesent fit real tight to the hub ,hard to explain in witting,after it's bolted on you can push the caliper 1/2 in to make it sit flush/snug on the hub,that's about all i can say about it ,
THANKS[chair] RICK
Is it missing the retaining clip on the caliper?
 
#14 ·
" i can just feel it "

[read]I was reading up on those Calipers today their is two typs of calipers and 1 is a floating caliper and the other is fixed solid ,mine is definitly a floater ,like if you pull on it with your hand it will move a bit in and out,the other caliper is on the same and its quiet,could the lower control arm be worn out and contribute to the out of line Caliper~hub~Rim ?I was driving the car[driving] today and their seems to be a creaking sound comming from the strut when i turn right or left ,its hard to see but it sounds like its moving a little also ,[idea]could the strut have anything to do with it ? Still got my 125$ cause thats what its gona take [boxface] " i can just feel it "
 
#17 ·
strut now instead of the caliper

[confused] The rotor's was new with the brakes i did myself,they were good for 2~3 weeks then it started to make small ticking sound while you drive ,today i really noticed the creaking sound coming from the strut when i turn the wheel ,and the ticking sound~~~{in the wheel}~~~would come and go as i drove (turning Left/right ) is when it "the ticking" would change ,I'm beginning to lean toward the driver side strut now instead of the caliper ,this could be where the problem is coming from ,not sure rite now ,continuing to look for movement in front end .[:(] what cha gonna do ?
 
#18 ·
that ticking is probably the pad retaining clip hitting the inside of the rim. i had this happen to me a while back. caused by really really really roasted wheel bearing and worn hub. the clip actually came off the pad when i was driving and made a big fuss when it did.
 
#19 ·
Yes ,well if it is the wheel bearing and hub ,its being very quiet and unnoticeable ,like micro ,So the strut is very creaky and grinding sound when turning the steering ,i've got to look closer to that and see if it could cause the effing problem ,but thanks
 
#20 ·
I think one of the slider bolts fell out and that allowed the caliper to swing forward and contact the wheel. I had this happen to me on one of my past cars (but I don't remember which one!...) No matter, if you take the tire/wheel off, I'll bet the problem will become immediately obvious.
 
#21 ·
yes ,as I start to explore other area's of the front end ,i found that the left front strut spring is always loose ,whether the cars is in the air or on ground ,and if it is ,would this cause the front end section to move around ,Lots of creaking whilst turning ,some times the noise stops and starts ,also pulls some times on left side ,? anyone ?
 
#23 ·
Something sounds bent. Either the mounting point for the caliper, the rim or both.

If the caliper is tight on the mounting point, then that's where I would check.
 
#30 ·
these typ of brakes are called floating calipers that's why their is movement of 1/2 in play ,they move when you brake so not to be rigid [read]

Sorry don't agree with your statement. A "floating" caliper is simply when the piston is on the inside of the caliper and the only movement is the sliding of the caliper over caliper pins. This is by far the most common type of caliper as it is cheaper to produce. The movement is minimal...hundreths to maybe a tenth of an inch is not an exaggeration....not a half an inch as quoted above. A "fixed" caliper is when there are pistons on both sides of the caliper and no caliper pins and thus no movement except the compressions of the pads. Naturally these are more expensive and found on premium vehicles or as aftermarket performance enhancements.