caliper mounting bracket bolt size
Team Owner
Joined: Dec 1999
Posts: 34,873
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From: Lacey WA RVN 68-69
NCM Sinkhole Donor
On my 87 it's a 21mm socket. Make sure you use a 1/2" drive 6-point socket as the bolts are torqued to something like 133 ft-lbs. A 12-point socket might round off the edges of the bolt face. Use a 16" or longer breaker bar to loosen the bolts.
Factory bolts have a threadlocker already on them. The old bolts can be reused by removing the old threadlocker and using some Blue Loctite on the threads and re-torquing.
Factory bolts have a threadlocker already on them. The old bolts can be reused by removing the old threadlocker and using some Blue Loctite on the threads and re-torquing.
Team Owner
Joined: Aug 2005
Posts: 34,988
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From: Riverside County Southern California
Co-winner 2020 C4 of the Year - Modified
2018 Corvette of Year Finalist
2017 C4 of Year
2016 C7 of Year Finalist
St. Jude Donor '09 thru '20
1. You grab, lets say a 18mm and if that one doesn't work, go back to the tool box and grab a 19mm.
2. If that one still too small repeat first step.
Le Mans Master
Joined: Aug 2007
Posts: 8,735
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From: WV
..........
... Come on Pete, he's just trying to save a trip back to the tool box......WW
Last edited by WW7; Mar 18, 2011 at 08:12 PM.
Team Owner
Joined: Aug 2005
Posts: 34,988
Likes: 515
From: Riverside County Southern California
Co-winner 2020 C4 of the Year - Modified
2018 Corvette of Year Finalist
2017 C4 of Year
2016 C7 of Year Finalist
St. Jude Donor '09 thru '20
Thread Starter
Instructor
Joined: Dec 2009
Posts: 124
Likes: 0
From: glens falls ny
Its my first break job by myself and i do have a decent tool box! Ive done up new pads on the back but just needed to get new rotors and pads on the front. It just seems everything i try is stripping it but ill head back out tomorrow and try an 18 or 19 mm thanks keep you guys posted!!
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Melting Slicks
Joined: Dec 2004
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From: Manteca CA
Thread Starter
Instructor
Joined: Dec 2009
Posts: 124
Likes: 0
From: glens falls ny
Everything went great got the new rotors and pads on the front end and the breaks are feeling better than ever!! It was an 18 mm on my 84 after that the job was a breeze i could yank those things right off by hand no breaker bar necessary with the hood poped! Thanks for all the advise it definitely made a difference!!!
