Caliper Pin Won't Go Back In

[RoyDaGeneral]

After changing my pads and rotors recently I started having brake noise. I read on it a bit and realized I had not done a good job cleaning and removing grime and stuff. So, I got a new set of brake hardware for front brakes and got everything cleaned and lubed properly. I did one side fine, but passenger's side caliper's pin, one with rubber sleeve, will not go back in. It has new sleeve and got cleaned and lubed very well. I used a clamp to push it back in, but it reaches a certain point and won't budge, not enough to allow caliper to go in. I removed it and used old sleeve, but still. What's the problem?

[RoyDaGeneral]

The only thing I could think of that would prevent pin from going back in was the grease I placed in caliper, so I removed some and it finally went in, but I'm still puzzled. I'd think the extra would seep out, but it didn't.

[AZhitman]

Weird. Must have been some damn tight tolerance!

[brickbox]

There must have been too much grease in there. Given the tight tolerance between the pin and the tube, the grease will get compressed to a certain point and without any venting, it will prevent the caliper pin from going in all the way. I learnt that when I did my first brake job....

[RoyDaGeneral]

That's good to know, but why are the pins different, lower one with a rubber sleeve and the upper without?