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Old 06-08-2013, 08:50 PM
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Caliper Guide Pin Bushings

Hi,
Just did a brake job on the X last weekend and replaced all 4 pads/rotors. While replacing the front passenger brakes found out that the cap for the lower guide pin was missing and not having the part on hand I ordered it online. So the part comes in this week and when I tried to put in on the guide pin bushing seems to have expanded and the cap went right into the bushing instead of fitting on it.

So long story short it looked like I needed to replace the bushing itself and went to NAPA auto parts since I have heard they carry OE parts for BMW but ended up getting a NAPA brand bushing instead. Got home took the tire and caliper off and was going to remove the old bushing but decided to double check the part I got and it doesn't seem to resemble the old one. I have attached an image of the part I got and would appreciate if someone could take a second look and see I am missing anything. Also I have read that the new bushing gets installed from the inside of the caliper. Is that right?

Further more I tried to place the cap and it wouldn't fit either end of the NAPA bushing.

Thank you
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Old 06-08-2013, 10:05 PM
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Are you talking about the rubber dust cap??

Thats all they are. The guide pin bushings are the metal pins...

most people dont have them on.

there is about 10mm of space between the face of the opening and the face of the bolt, so other than dirt and grime, they can be exposed.
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Old 06-08-2013, 11:13 PM
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Quote:
Originally Posted by jgold47 View Post
Are you talking about the rubber dust cap??

Thats all they are. The guide pin bushings are the metal pins...

most people dont have them on.

there is about 10mm of space between the face of the opening and the face of the bolt, so other than dirt and grime, they can be exposed.
No, the guide pin bushings are distinctly different from the pins -- They are what is pictured by the OP. The pin slides inside of this bushing, and the dust cap plugs the end.

To the OP: In your picture of the bushing, the right half is what goes into the bore on the caliper. They're simply a push in bushing, and the expanded lip in the end is what prevents it from coming back out. They usually require some squishing and finessing to fit in. The bushings are pretty flexible...so again with the dust cap it may be a bit tight.

Whether or not thats the "correct" bushing though.....its easy enough to pull out the old ones and compare.
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Old 06-09-2013, 01:33 PM
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Quote:
Originally Posted by X5SND View Post
No, the guide pin bushings are distinctly different from the pins -- They are what is pictured by the OP. The pin slides inside of this bushing, and the dust cap plugs the end.

To the OP: In your picture of the bushing, the right half is what goes into the bore on the caliper. They're simply a push in bushing, and the expanded lip in the end is what prevents it from coming back out. They usually require some squishing and finessing to fit in. The bushings are pretty flexible...so again with the dust cap it may be a bit tight.

Whether or not thats the "correct" bushing though.....its easy enough to pull out the old ones and compare.
Thanks for your reply. Yes that's what I thought, the right half is what is supposed to fit in the caliper but comparing it to the old one without taking it off it looks like it's the right part sticking out of the caliper where the dust plug goes. Also the left part is tapered which none of the installed bushings look like.
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