So a few months ago I had the front drivers side brake caliper freeze up on me. Since they were near 20 years old (96 XJ Sport I6) I replaced both calipers.
Skip forward a few months and suddenly one of the new calipers (front passenger) froze on me. I came to this board and it was suggested that when I replaced the brake calipers I should of flushed the brake system and put in new rubber lines so I did.
Yesterday the front passnger side caliper froze on me again. I pulled over, opened the bleeder, and the caliper opened up. I drove it home with no issues.
So what am I missing? The MS and the PB are original so 18 years old. Is it possible that they are the issue? Any help/advice is welcome.
Love my XJ but she is annoying me right now with this issue.

 

It can be many things. You may have some crap in the new caliper from the old fluid or maybe you got a defective caliper since it's only happening on the passenger side. I would check those out before you move to the master cylinder. Let us know what you find and if you still have the problem we can go from there.

 

Gotcha...lets assume that I have crud inside the new caliper. Is it work the time to try to clean out the caliper and if so how does one do that...like is there a special way to clean a brake caliper?
Or am I better off just to replace it?

 

Personally, I would just take it back since you just got it and still have a warranty on it and tell them that it is defective. That way you don't have to mess with it and take it all a pat to clean it out.

 

Sounds like a plan.
I will get to work on it today, thanks for your help bro.

 

Not a problem. That's what we are all here for. Let us know what you find.

 

Before you take the calipers back, make sure the problem isn't that the pads are hanging up on the carriers (steering knuckle). I had this problem on my XJ, and I noticed the pads had worn a groove where the backing plate slides along the steering knuckle, and they'd get stuck in the groove when I got on the brakes hard and wouldn't retract. I ended using a dremel to smooth out the surface (wish I took a pic), and that fixed it. All my other cars are FWD, and the carriers are separate from and bolted to the steering knuckle, making replacement much easier.