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post #1 of (permalink) Old 08-29-2016, 01:39 PM Thread Starter
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caliper bolt/pins proper hole

Hi everyone 1st post....I was researching the forum and found only 1 thread last year..Slimbob asked the question and he really didn't get a solid answer....there are 2 caliper slider pins/bolts....both are different...one has 3 flat surfaces machined in it and the other has a rubber type tip at the end....they are no doubt like this for a reason..or they would both be the same right?......they both fit in either hole and will tighten up....but since they are both different they have designated holes, so.....which one goes in the "upper" and which one goes in the "lower" hole anyone with a GM Impala shop manual that can give us the correct answer also why they are like this would be nice to know as well thank you
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post #2 of (permalink) Old 08-29-2016, 03:00 PM Thread Starter
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been looking for a long while now and have come up with conflicting answers.....but no real concrete evidence of which one goes where
even GM dealerships do not have an exploded view of their proper location....?
Anyone?????

Last edited by impally; 08-29-2016 at 03:02 PM. Reason: adding a question
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post #3 of (permalink) Old 08-29-2016, 03:41 PM
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The upper caliper pin bolt, has a bushing as part of the bolt.
The lower caliper pin bolt, is of a solid design.


2015 LTZ
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post #4 of (permalink) Old 08-29-2016, 04:44 PM
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Quote:
Originally Posted by impally View Post
Hi everyone 1st post....I was researching the forum and found only 1 thread last year..Slimbob asked the question and he really didn't get a solid answer....there are 2 caliper slider pins/bolts....both are different...one has 3 flat surfaces machined in it and the other has a rubber type tip at the end....they are no doubt like this for a reason..or they would both be the same right?......they both fit in either hole and will tighten up....but since they are both different they have designated holes, so.....which one goes in the "upper" and which one goes in the "lower" hole anyone with a GM Impala shop manual that can give us the correct answer also why they are like this would be nice to know as well thank you
I'm getting more curious about this. I googled it (caliper slide pins different) and got several hits on other automotive forums, but no clear consistent info about which end they go on.

I learned they're supposed to function as "anti-rattle" devices, but it's not all clear what the rattling is nor how it's fixed by these So I'd love to learn more.

The reply from Big3 herein clearly indicates the shop manual calls for them on top. And I'll do that next time I'm working on one of my Impalas. But it seems I've taken several apart over the years and found them inconsistent - one front would be on top while the other front brake caliper had that pin on the bottom. As I recall, at least in some of those cases, that was how they came from the factory (or from the dealer).

Anyway, I'd like to read more about this here.

Doug

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post #5 of (permalink) Old 08-29-2016, 07:30 PM Thread Starter
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that's what happened to me ...i was doing wife's front brake and noticed the right frt. had anti rattle pin on bottom while left side had it on top ......that's when i jumped on line to find out where it is supposed to be and spent all afternoon with no concrete evidence...the wife was taking it in to the local garage so i figured they not knowingly mixed them up anyhow i have to change them around because i put them on the bottom and big3 has about the best evidence so far as to their proper location ..would like to talk to the brake engineers at GM to find out the physics of this though
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