Ford Focus Forum, Ford Focus ST Forum - View Single Post - 2012 Titanium Front Strut Low Speed Noise (Clunk/Rattle)
View Single Post
Old 11-01-2012, 11:24 AM   #1451
PratoN
Focus Fanatic
 
PratoN's Avatar
 
Join Date: Jul 2011
Fan#: 88058
Location: Milwaukee, WI
What I Drive: 2012 Kona Blue Ti Hatchback, DCT

Posts: 3,853
Points 2,794, Level 32
Points: 2,794, Level: 32 Points: 2,794, Level: 32 Points: 2,794, Level: 32
Level Up 30% Completed
Level up: 30% Level up: 30% Level up: 30%
Forum Activity 28%
Activity: 28% Activity: 28% Activity: 28%
FF Reputation: 11 PratoN Great Standing Member
Buy-Sell-Trade Rating: (0)
Quote:
Originally Posted by hand-filer View Post
The existing bolts are the equivalent to a grade 8 rating which is pretty strong in terms of tensile strength.
A 12.9 rated bolt would be better but at some point we need to consider the strength of the material you are installing the bolt into.
The engineering technologist in me is saying that we should not take this too lightly.
These 6, 8mm bolts are holding our front ends together.
Correction *barely holding

8mm!? Sweet Jesus. It looks like proof load is 22ft-lbs and maximum is 29ft-lbs - 1.25 coarse pitch (24/32 1.0 fine pitch) I use this site: http://www.futek.com/boltcalc.aspx?mode=metric

M8x0.5 bolt would bring us to 27ft-lbs recommended 36ft-lbs maximum. My head hurts.
__________________
2012 FF Ti HB Kona Blue, Built 5/24/2011, 401A + Ti Handling Package, Parking Technology Package, Winter Package, Moonroof, and MFT w/NAV at v3.6 96k miles and counting...
PratoN is offline  
    Reply With Quote