steering and suspension Broke A Front Subframe Bolt...aarrgghh!

[Buckeye]

On 6/14/2013 at 3:17 PM, jmiller said:

So I was installing my newly powder-coated front subframe with zinc-chromate re-plated bolts.  With a touch of antiseize on each bolt.  The front bolts have a lot of friction; is this normal?  I tighten them with the normal ratchet wrench.  The Haynes manual says torque to 55 ft.-lbs., so I start with the front bolt.  It doesn't seem to want to tighten up.  I'm worried, so I stop and move to the next bolt back.  It doesn't seen to want to tighten up either, but as I'm pulling...BAM!  Bolt has sheared off!  These are 8.8 hard bolts!  

 

Thanks,

 

Jeff

 

 

Haynes manual torque value for sub-frame to frame rails is incorrect. it should be 4.3 +0.5 mkp / 31 +4 lb/ft

 

http://www.bmw2002faq.com/forums/topic/185033-torque-specification-front-axle-sub-frame/

 

Google spreadsheet has been updated:

https://docs.google.com/spreadsheets/d/1VzY_ydaeqp_lN-NT_dpMSjvD9_rbh5g27BunmTNRKKI/edit#gid=7