What's new
The Grenadier Forum
Register Now for enhanced site access.
INEOS Agents, Dealers or Commercial vendors please contact admin@theineosforum.com for a commercial account.

Failed Bolt - Suspension Arm

stickshifter

stickshifter

Local time
3:39 PM
Joined
Nov 14, 2021
Messages
1,172
Reaction score
2,423
pete54 said:
Thanks - in answer to your questions:

1) Are you running larger tires or stock size?
Stock tires
(2) Are you running a suspension lift, or stock height?
No - stock height
(3) Have you been cycling the suspension off-road?
Nothing remotely extreme other than Edinburgh potholes yet

Took delivery early last month so it’s not one of the early production models. Been driving well within limits while running in so nothing out of the ordinary/expected done.

Hopefully it’s just a defective bolt rather than a wider problem.
Click to expand...
Yeah - the defective-bolt explanation seems like the most likely. Occam's Razor.
 
Rab

Rab

Grenadier Owner
Lifetime Supporter
Local time
3:39 PM
Joined
Nov 16, 2022
Messages
202
Reaction score
557
Location
N.Ireland
Looks like a bolt failure originating in the square corner of the washer locating keyway. Manufacturing defect.
 
Clark Kent

Clark Kent

Grenadier Owner
Lifetime Supporter
Local time
1:39 AM
Joined
Jul 26, 2022
Messages
644
Reaction score
1,649
Location
Toowoomba QLD, Australia
There's some bruising on the flats of the nut in @pete54's 2nd pic. I wonder if someone has put a rattle gun on it and sheared the bolt inside the nut. I suspect torquing from the bolt head with the nut still at final installation torque could also shear the bolt. The keyway will be a stress point.

That joint is eccentric to correct tracking issues. The eccentric washer under the bolt head is part of the bolt. The eccentric washer under the nut is keyed to the bolt. Loosen the nut (important!) then rotate the bolt and the radius arm will shift inside the axle bracket. I can't get a brand from the bolt head markings but they're grade 10.9 and perhaps APO or AP0 (AP zero). The bolts at the front of the radius arms are marked 10.9 and KX2. Google says KX2 could be KAMAX Holding GmbH & Co. KG. They produce specialty fasteners including eccentric suspension bolts.
 

Attachments

  • PXL_20240122_024429405.jpg
    PXL_20240122_024429405.jpg
    2.7 MB · Views: 81
  • PXL_20240122_024403259.jpg
    PXL_20240122_024403259.jpg
    2.7 MB · Views: 60
  • PXL_20240122_024345888.jpg
    PXL_20240122_024345888.jpg
    2.8 MB · Views: 58
  • Front.jpg
    Front.jpg
    5.8 MB · Views: 96
Last edited:
Sela Green

Sela Green

Green Grenny - now the fun starts...
Grenadier Owner
Lifetime Supporter
Local time
9:39 AM
Joined
Nov 18, 2023
Messages
63
Reaction score
193
Location
Colorado, USA
Take a good look at the initial picture. That bolt has been compromised for a while. Good catch though, much better than coming apart at high speed.
 
Clark Kent

Clark Kent

Grenadier Owner
Lifetime Supporter
Local time
1:39 AM
Joined
Jul 26, 2022
Messages
644
Reaction score
1,649
Location
Toowoomba QLD, Australia
There's no hiding the tool damage on the nut and the bolt keyway has been damaged by the washer. This joint has had maintenance after assembly.
But what really matters is that it fell apart while parked on the driveway and @pete54 spotted it. How lucky was that!
 

Attachments

  • Screenshot_20240122-181211.png
    Screenshot_20240122-181211.png
    2.6 MB · Views: 82
Tazzieman

Tazzieman

Grenadier Owner
Lifetime Supporter
Founding Guard
Local time
2:39 AM
Joined
Sep 30, 2021
Messages
6,649
Reaction score
13,233
Location
Tasmania
btw I can't see a witness mark on that bolt?
Mine has them, as it should.
 
pete54

pete54

GG-2562
Grenadier Owner
Lifetime Supporter
Local time
3:39 PM
Joined
Apr 27, 2023
Messages
82
Reaction score
335
Location
Scotland
Tazzieman said:
The OP seems to have Silent Witness marks
Click to expand...
There were check marks on mine but failed to take a photo of them and left the offending pieces with the dealer.
 
  • Like
Reactions: PBD
parb

parb

Grenadier Owner
Lifetime Supporter
Local time
8:39 AM
Joined
Sep 10, 2023
Messages
849
Reaction score
1,239
Location
Silicon Valley, CA, USA
Clark Kent said:
There's no hiding the tool damage on the nut and the bolt keyway has been damaged by the washer. This joint has had maintenance after assembly.
But what really matters is that it fell apart while parked on the driveway and @pete54 spotted it. How lucky was that!
Click to expand...
Got to be some amazing force put down on that bolt if its due to a tool creating the damage. Isn't that bolt class the ISO equivalent of an SAE grade 8 bolt?

...and even crazier that it came out while parking or parked! what a luck, I had a similar defect from metal fatigue on an offroad vehicle, but it broke the control arm (a 3/4" part) under heavy stress while climbing a mountain. i didn't enjoy that experience a bit and i travelled at low speed. I can't image that happening while going fast...
 
Trialmaster

Trialmaster

Grenadier Owner
Local time
3:39 PM
Joined
Nov 10, 2022
Messages
1,212
Reaction score
2,896
Location
North of Watford!
David van Breda said:
I'm no prophet of doom but Ineos better get a grip on the Grenadier before they find out the unforgiving nature of this market in the 21st century!
Click to expand...
This Forum will kill the Grenadier. I don't disagree this is a major problem. However, reading all these negatives doesn't bode well for the Ineos on this Forum.
 
  • Like
Reactions: PBD
anand

anand

Photo Contest Winner
Forum Moderator
Grenadier Owner
Lifetime Supporter
Local time
11:39 AM
Joined
Mar 12, 2023
Messages
2,938
Reaction score
4,720
Location
Maryland
David van Breda said:
I'm no prophet of doom but Ineos better get a grip on the Grenadier before they find out the unforgiving nature of this market in the 21st century!
Click to expand...
Not sure how many other ways to say that this bolt was a known problem in earlier productions and has been updated/fixed; and while this is unfortunate to see happen, appears to be the only one from the nearly 5000 people on this site
 
You must log in or register to reply here.

Similar threads

MileHigh
Steel Wheel Stud and Bolt Covers (3D Printed)
Replies
0
Views
140
MileHigh
MileHigh
TheDocAUS
FITTING 20 INCH LED LIGHTBAR TO THE ROO BAR
Replies
14
Views
1K
TheDocAUS
TheDocAUS
ZEN_OWT
Harsh Vibration at high speeds
Replies
19
Views
873
ZEN_OWT
ZEN_OWT
ZemTyrion
Long road trip report
2 3 4
Replies
67
Views
2K
Dokatd
D
W
Right hand driver grab handle
Replies
14
Views
807
Dual Grenny Guy
Dual Grenny Guy
Forum Store
The officially unofficial podcast for INEOS Automotive Grenadier Works Podcast
INEOS Grenadier Configurator

Latest posts

Share this page

Back
Top Bottom