C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Front caliber nearly fell off!!!

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Old Oct 1, 2001 | 11:09 PM
  #1  
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Default Front caliber nearly fell off!!!

Driving to work this morning, get off the freeway and I get a hard clunk and a short deep vibrations. As I'm coasting into the parking lot it repeats a couple more times. Went out at lunch and find on the right front caliber that the bottom bolt which holds it on is missing and the caliber was flipping back and grinding on my chrome rim. Called the auto parts store and they have to order one which will be here in a couple of days. A couple months ago I was short on time and had a shop do some brake work which included new calibers. :mad Has anyone seen this before? All you do is tourqe them to the proper spec right? I don't want this shop to touch my car again but I am P.O.ed and want to let them know about this.

Thanks for any input.
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Old Oct 1, 2001 | 11:56 PM
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Default Re: Front caliber nearly fell off!!! (87SAM)

That's downright scary. Never even heard of sumpthin like that.

Bob
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Old Oct 1, 2001 | 11:59 PM
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Default Re: Front caliber nearly fell off!!! (87SAM)

:eek: :eek:

by chance did someone switch your "b" and "p" keys on your keyboard?
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Old Oct 2, 2001 | 12:00 AM
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Default Re: Front caliber nearly fell off!!! (BobMachus)

New to me. Never heard of that before. I would have them pay to have it fixed with all new everything that might have been damaged or part of the trouble and then have a second guy inspect it just to be sure.
92TripleBlack :eek: :confused: :boxing
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Old Oct 2, 2001 | 01:42 AM
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Default Re: Front caliber nearly fell off!!! (Glock'94)


by chance did someone switch your "b" and "p" keys on your keyboard?[/QUOTE]

Naw :crazy: :crazy: :crazy: I knew I was fighting mad, just didn't know I was thinking of what caliber to use because of my bad caliper. :blueangel: :blueangel:

Does anyone use loctite? Or just proper tourqe?
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Old Oct 2, 2001 | 02:11 AM
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Default Re: Front caliber nearly fell off!!! (87SAM)

:eek:
Try sheering all the lug bolts on a back left wheel and having the wheel fly off into opposite traffic! Nobody hurt but I had a hard time explaining to the cops!
Anyhow, just torque your new bolts to spec and try double checking it after couple of days to make sure, although that shouldn't really be necessary....oh, and don't go back to that shop!
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Old Oct 2, 2001 | 03:33 AM
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Default Re: Front caliber nearly fell off!!! (KORE YOME)

:eek:
Try sheering all the lug bolts on a back left wheel and having the wheel fly off into opposite traffic! Nobody hurt but I had a hard time explaining to the cops!
What part didn't the cops understand ?

A. The wheel came loose because the nuts sheared.
B. The laws of physics dictated where the wheel flew.
C. You didn't do it on purpose.

:rolleyes: :rolleyes: :rolleyes: :rolleyes: :rolleyes:
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Old Oct 2, 2001 | 06:20 AM
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Default Re: Front caliber nearly fell off!!! (87SAM)

I had an 87 back in the early 90s and the same thing happened to me. I parked at a restaraunt in Columbia, SC and when I came out the car would not go backward. Drove home with a scraping noise. The next mourning I found the back bolt missing and a nice ring on my rim.
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Old Oct 2, 2001 | 03:04 PM
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Default Re: Front caliber nearly fell off!!! (87SAM)

I do not have the service manual for 87's, but my 96 factory manual specifies new bolts and threadlocker for the caliper mounting bolts.


Dennis
GS-598

:cheers:
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Old Oct 2, 2001 | 03:10 PM
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Default Re: Front caliber nearly fell off!!! (GS-598)

GS-598, you are correct sir. Thread lock is a must! Even if the torque is not set correctly, the shop should be using blue/red threadlock, that will not let the bolt come loose regardless. Totally unprofessional. Bastards. :mad
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Old Oct 2, 2001 | 04:39 PM
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Default Re: Front caliber nearly fell off!!! (into01000101)

Believe it or not, the same friggin bolt fell off my car about two weeks ago. I did my own brake work. The factory service manual says to use new bolts, and that the new bolts come with threadlocker already applied. It does NOT say to apply your own threadlocker. I used brand new GM bolts with the factory threadlocker, torqued it to spec, and the thing still fell off after 4 months of driving. :rolleyes:

So you could say I don't trust the factory threadlocker anymore and use Loctite instead. Lesson learned...
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Old Oct 2, 2001 | 11:54 PM
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Default Re: Front caliber nearly fell off!!! (GS-598)

Thanks to all for you comments and tips! New bolt should be here tomorrow. Guess I should order 3 more since it looks like the shop reused the old ones. Thanks to your comments, I will be using thread lock. I have the service manual so I will be checking that out for the torque specs. Maybe we will all need to check this.

Thanks all! :flag :flag :flag
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Old Oct 3, 2001 | 02:55 AM
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Default Re: Front caliber nearly fell off!!! (87SAM)

Are you saying that the caliper itself is off and hinged back against the wheel, or that the caliper bracket is missing a bolt and hinged back against the wheel? If its the caliper and not the bracket, you need new caliper brackets because yours are stretched and it will just happen again and you'll just loose another caliper pin. I've had this problem before...
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Old Oct 3, 2001 | 01:11 PM
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Default Re: Front caliber nearly fell off!!! (White Lightning 89)

Finally have a day off of work and looked closer at it (parked in a secured lot at work). Lost the bolt which holds the caliper bracket to the knuckle, which allowed both the caliper & bracket to hinge back to the wheel. Guessing I ordered the wrong bolt. With my luck I'll have the locking bolt which holds the caliper to the bracket.

The manual says to torque to 133 ft-lb and to allow 2 hours for adhesive to set but does not give a PN for the adhesive. Would the blue/read thread lockwork here?

Also by looking at the other bolts it does not look as if the shop removed these bolts to replace the calipers. So I guess I should not get on them just yet.

FYI- I removed the top bolt to use to match up to the new one. Only needed a socket and my fingers to remove it, no ratchet.

Thanks all
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