Brake caliper hitting top of rotor

[tjfeakbk1]

Have a 97 Chevy Tahoe. Have replaced every component of the brake system including all the lines as well. My passenger caliper keeps tilting forward when braking coming into contact with the rotor. Have already tried new rotors and calipers and continues to happen. Have used reman and brand new calipers and it is the same. Even had a local shop check it over and they cant find anything wrong. Any Ideas?

 

[Schurkey]

97 Chevy Tahoe

Have replaced every component of the brake system including all the lines as well. My passenger caliper keeps tilting forward when braking coming into contact with the rotor.

Faulty mounting pins for the caliper? Worn-out female threads in the knuckle?

Steering knuckle worn out or bent? Excess clearance between caliper and knuckle?

What if it's not the caliper moving towards the rotor, but the rotor moving towards the caliper--failed wheel bearings?

 

[movietvet]

IMO, it's amazing that a "shop" could not immediately inspect for what @Schurkey said. Mounting pins was my first thought. As problem was being described, I was waiting for that to be brought up. Female threads problem should show immediately, if that is the cause.

Are you saying caliper tilts forward when braking? How is it you see that. 4x4 off the ground and rotor spinning and apply brakes and can see?

 

[1998_K1500_Sub]

OMG, this thread is so much like this other thread-in-progress:

HELP! caliper dragging on rotor.

1993 chevy k2500 5.7 6 lug Just did my front brakes on the truck and my driver side caliper is hitting the rotor and dragging. my passenger side isn’t so i already switched the rotors to double check to see if they gave me a bad rotor or something, still the same result, this makes me thing...

www.gmt400.com

Are there some bad calipers out in the wild?

What's going-on here?

 

[tjfeakbk1]

I got mine sorted out. There was not enough grease on slide pins. The caliper was able to move just enough to make contact with the rotor.

 

[movietvet]

I got mine sorted out. There was not enough grease on slide pins. The caliper was able to move just enough to make contact with the rotor.

Having a hard time picturing that. Caliper slides side to side on pins. How does grease stop contact that would be an up and down motion?

 

[1998_K1500_Sub]

... Have already tried new rotors and calipers and continues to happen. Have used reman and brand new calipers and it is the same.

I got mine sorted out. There was not enough grease on slide pins. The caliper was able to move just enough to make contact with the rotor.

So the same problem existed across multiple calipers, and then now "grease on the slide pins" is claimed to be the root cause?

As @movietvet noted, a problem like this doesn't seem rooted in the slide pins.

This still sounds fishy to me... as though the problem is still elusive and is lying in wait.

 

[Schurkey]

Grease is not the fix. There's something else going on.

I'm reasonably sure you're going to find the actual problem is in the steering knuckle...but I'm not there to see it in person.

Photos of the caliper fitment on the knuckle might be useful.

 

[GoToGuy]

Have you checked the rotor diameter? Are the slides worn to the point there is slope forming, allowing contact.
Moving parts, heavy, harsh operating environment, insufficient maintenance, everything adds up to more wear and tear. Just something to consider.

 

[1998_K1500_Sub]

Have a 97 Chevy Tahoe.

I've a couple relevant questions:

How long have you owned the truck, namely, has it had this rotor interference problem as long as you've owned it, or has it happened sometime after you bought it?

Does your truck have aftermarket spindles installed, e.g,. "drop spindles", etc? Were they on the truck when you bought it, or did you install / have them installed?

The caliper should come in close proximity with the abutments on either end (pictures attached, courtesy of @sethturbo). Do yours look like this?

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