Rear Brake Bolt-sheared off - RX7Club.com - Mazda RX7 Forum

New Member RX-7 Technical Post your first technical questions here, in an easy flame free environment, before jumping into the main technical sections.

Rear Brake Bolt-sheared off

Reply

 
 
 
Old 05-17-18, 06:56 AM
  #1  
Junior Member
Thread Starter
 
Join Date: Dec 2005
Location: MN
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Rear Brake Bolt-sheared off

Car is a 94 FD Touring with 34k miles. No mods and this was its second trip waking from winter hibernation.

Was out and about last night and heard a loud metal clanking sound post braking. Stopped to find the lower rear brake bolt broke off causing the caliper to come out of alignment with the rotor.

this is the bottom bolt that goes through the hub and then through the brake caliper clip and then bracket. The threads on the hub looks to be gone with the threads on the caliper bracket still intact.

I will take some pictures after work today. Looking for suggestions on causes and potential fix. Was hoping not to replace the hub now with missing threads for a new bolt.

Last edited by accord917; 05-17-18 at 06:57 AM. Reason: More info
accord917 is offline  
Reply With Quote
Old 05-17-18, 08:55 AM
  #2  
Viable fossil
iTrader: (10)
 
Sgtblue's Avatar
 
Join Date: Oct 2003
Location: Mid-west
Posts: 9,657
Thanked 75 Times in 64 Posts
Can’t remember for certain...but not sure the bolt hole in the hub is threaded. Are you sure that the bolt doesn’t just thread into the caliper bracket? Maybe just need another bolt? If that’s correct the bolt probably just worked loose and eventually failed. Those are torqued from the factory pretty tight IIRC. Possibly with thread locker. But heat cycles, time and moisture can do things.

And 10 years and six posts??? You need to come out of your shell man!

Last edited by Sgtblue; 05-17-18 at 09:06 AM.
Sgtblue is online now  
Reply With Quote
Old 05-17-18, 09:12 PM
  #3  
Junior Member
Thread Starter
 
Join Date: Dec 2005
Location: MN
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Thank you for the response. Had some more time to look at it this evening. I will be ordering new bolts and tightening things down to the proper torque spec. Look to be old age as the culprit. Checked the other side as well as the front brakes and they are all now torque to spec.

Thank you for calling me out. I have been lurking too long 😁
accord917 is offline  
Reply With Quote
 
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
thetech
Race Car Tech
6
06-12-08 08:39 PM
C's-7
3rd Generation Specific (1993-2002)
12
05-28-06 04:03 PM
garlic
2nd Generation Specific (1986-1992)
4
11-20-05 05:09 PM
Mombodogs
2nd Generation Specific (1986-1992)
0
09-09-05 05:57 PM
avoges
2nd Generation Specific (1986-1992)
7
05-15-03 02:27 PM


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: