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Discussion Starter · #1 ·
put on front pads and rotors over the weekend. went on test drive and heard noise. apparently when i was distracted by phone call, i didnt tighten up the caliper bolts on one side. one bolt was missing and other one was starting to loosen

i checked all bolts on both sides and tightened again to be sure.

however after taking it on my long drive to work i now hear something loose. its only moderate and not as loud as when i lost a bolt. but when i go back under there if the bolts are loose, should i use loctite?

never used loctite on SS and never had issues. also changed out the rotors 50K ago and never had issues. of course until i get under there i dont truly know if this is even the issue. i used the new clips. perhaps i didnt put them on quite right. ugh. i just know the noise shouldnt be there.
 

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From my experience being a former Master certified AUTO/DIESEL tech, I would clean the threads on the caliper mounting bracket bolts and caliper bolts. Id add blue loctite and torque each bolt to spec. Never an issue at all.
 

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put on front pads and rotors over the weekend. went on test drive and heard noise. apparently when i was distracted by phone call, i didnt tighten up the caliper bolts on one side. one bolt was missing and other one was starting to loosen

i checked all bolts on both sides and tightened again to be sure.

however after taking it on my long drive to work i now hear something loose. its only moderate and not as loud as when i lost a bolt. but when i go back under there if the bolts are loose, should i use loctite?

never used loctite on SS and never had issues. also changed out the rotors 50K ago and never had issues. of course until i get under there i dont truly know if this is even the issue. i used the new clips. perhaps i didnt put them on quite right. ugh. i just know the noise shouldnt be there.
I don't like Loctite being used on the caliper mounting bracket bolts nor the slide pins. I've dealt with it removing someone else's handy work. It can be a bear getting the bracket bolts out after they've been glued in. (Remember, red Loctite is red super-glue, albeit a little milder.)

If they're torqued properly (and not somehow damaged), I cannot see them coming loose. Keep in mind, the torque specs on the bracket bolts is on the order of 100 foot pounds - they ain't coming loose :)

So now you need to find out what's wrong with yours. After you re-tightened them, they should not have come loose, unless there's some damage there, such as a stripped bolt or hole.

Or maybe it's something else making the latest noise. Whatever it is, I hope it's an easy fix for you.

BTW, what did you use for the replacement bolt?

Doug

[Edit] That said, in the manual it says to use thread locker:


Apply THREADLOCKER, GM P/N 12345493 (Canadian P/N 10953488) or equivalent, to the threads of the brake caliper bracket bolts (2).​


That crosses to high temp red Loctite.

Permatex 24026 - Threadlocker RED | O'Reilly Auto Parts

I was looking up the bracket bolt torque, 133 foot pounds for my 07 SS, when I saw that recommended.

I don't like contradicting the manual - I follow it 99% of the time - but I'm still not a fan of using thread locker on those bolts :|

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Discussion Starter · #4 ·
10 bucks for slider kit at autozone. didnt know was 100 lb. heck i can use my airgun with my torque stick but it wont fit lol

guess ill get out the torque wrench..what is the spec for the caliper bolts?

pretty sure loctite was on the bracket bolts, my breaker bar took lotta juice to break them free.

what is the official wrench to use to hold the inside of the slider while you tighten the caliper bolt? on one , the 11/16 worked but on the rest i had to use vice grips. i tried 2 different 11/16 and the lip was too close to let the wrench in.
 

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For what it is worth, I have never reapplied locktite to caliper bracket bolts and most certainly never on the slide pins. Getting the bolts torqued to spec is the key... They will never come loose.

Make sure you can clean the slide pins and grease them when you reassemble. Also, if you didn't get new hardware clips with your pads, take a wire brush and scrub the old ones to get all of the built up brake dust and gunk off of them. Dab some lube on them so the brake pad ears can move easily. Lastly, make sure you cleaned the brake rotors really good with brake cleaner or dish detergent and a scrub pad. New rotors are coated with oil to keep them from rusting while sitting on shelves. This oil must be cleaned off before install. All 3 of these steps if not done can result in noise, at a minimum.
 

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Discussion Starter · #9 ·
i had new clips

crap forgot to clean off rotors..well they have 1500 miles on them now...guess too late

turns out i lost another bolt..not happy. put another one on and it wasnt getting tight. the slider must have been stripped. thankfully i had my kit from last week. so new slider was greased up and boot put on and i did not use any locktite on it. however as i was tightening it with the torque wrench, just appears wasnt good idea to keep tightening. i cannot explain it but i didnt get it to 100 with the wrench.

also i know its a silly issue but if you do use the 11/16 on the inside of the slider, its a mother to get it off once u tighten things up. is it suposed to be like that? i'm just using vice grips from now on. i'm glad i bought that slider kit last week. i went on a test and did one or 2 emergency stops and didnt hear anything

i'm amazed i could drive 700 miles this week with no issues with that one bolt missing.
 

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i cannot explain it but i didnt get it to 100 with the wrench.
To be clear, the front bracket bolts are 133 ft-lbs. The bolts for the front guide pins are 26 ft-lbs.

Rears are: bracket 88 ft-lbs, guide pins 32 ft-lbs. Data for 2006-2010 Impalas, Haynes Repair Manual. I assume it still applies to the 2014 models.

Doug

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Discussion Starter · #11 ·
To be clear, the front bracket bolts are 133 ft-lbs. The bolts for the front guide pins are 26 ft-lbs.

Rears are: bracket 88 ft-lbs, guide pins 32 ft-lbs. Data for 2006-2010 Impalas, Haynes Repair Manual. I assume it still applies to the 2014 models.

Doug

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well then that explains why the old pin was stripped. lol..did it too tight. my guess is i may have messed up the new bolts now since i tightened so tight. sigh. ill wait for them to snap, lose the bolt and buy another kit i guess.
 
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