- Dilbert.
- Feb 20, 2006
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two thumbs uuughhlp
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Kip posted:
I'm pretty sure both of them do that.
Beat me to it.
That BMW curb mishap reminded me of this incident:
http://www.liveleak.com/view?i=a28_1246390274
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Nov 12, 2009 09:59
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May 8, 2024 04:02
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- Dilbert.
- Feb 20, 2006
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two thumbs uuughhlp
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BigKOfJustice posted:
Now if the H2 broke a tie rod in a mall parking lot.. that would be funny 
I know this is old and lacks enough photos to make up for the amount of text, but it's still relevant I think.
Hummer Ball Joint Failure Analysis
chemaxx.com posted:
Hummer Ball Joint Failure Analysis
An individual was driving a Hummer west bound on a State Highway and had pulled into the left hand turn lane to turn left (south) onto another street. According to the police report, the Hummer's steering locked up and the Hummer skid and hit an oncoming vehicle that was traveling eastbound.
Hummer Damage
At the time of the accident, the driver's side wheel assembly of the Hummer was not immediately found. It remained outdoors for about two days, during which time it is said to have rained. The wheel assembly was found north of the Highway and east of where the Hummer came to a final stop. Total distance from the Hummer to the wheel assembly was said to be about 20 feet.
Upon close examination the steering knuckle was found to have fractured. Chemaxx was asked to examine this fracture an to assess whether the fracture caused the accident or the accident caused the fracture.
Close-Up of Lower Ball Joint Portion of Hummer Steering Knuckle
Information provided to the National Highway Traffic Safety Administration (NHTSA) indicates that there have been at least 11 previous incidents involving Hummer steering knuckles.
It did not go without notice that the Hummer's airbags did not deploy and that the collateral damage to other portions of the Hummer appeared relatively light. In other words, other parts of the Hummer might be expected to bend or break before the steering knuckle if the failure was in fact due solely to impact overload. Sometimes, what is not seen is as important as what is seen. The lack of significant collateral damage suggests that there was something going on that was not a simple impact overload. This is not to say that there was no collateral damage, just that it was not very heavy.
It was noted that the steering knuckle is made from alloy SAE J434 Grade D4512, which is a type of cast iron. According to the 9th Edition of the Metals Handbook, this alloy is suitable for "moderately stressed parts." Considering that all of the Hummer's front end weight is supported by the ball joints of the two steering knuckles, it is questionable that the Hummer's steering knuckle could be considered as a "moderately stressed part." The preferred alloy type for the steering knuckle would be forged steel. A second choice might be cast steel. Cast iron would not be a first choice.
The investigation is on-going.
Grede Foundries part linked to Hummer crashes
Milwaukee Business Journal posted:
Federal traffic safety officials are investigating a series of Hummer H2 crashes and their possible link to a failure of a part supplied by Grede Foundries Inc. of Wauwatosa.
No official cause for the crashes has yet been determined under an ongoing investigation by the U.S. Department of Transportation's National Highway Traffic Safety Administration. In reports to the agency, Hummer manufacturer General Motors Corp., Detroit, denies that the cause stems from a defect in the suspect part.
The federal agency is investigating 26 incidents of wheels falling off or front suspensions collapsing on Hummer H2 sport utility vehicles. The incidents are accompanied by an apparent fracture of a part called a steering knuckle, which connects the upper and lower ball joints that serve as pivot points for the front steering system.
The knuckles were supplied to GM from the Reedsburg plant of Grede Foundries, a lower-tier automotive supplier that provides the parts to upper-tier suppliers like Delphi Corp. Grede supplies the parts for numerous models of cars and trucks from a variety of manufacturers, Grede president Bruce Jacobs said.
Jacobs said he is not aware of any manufacturing defect in the suspect part and that GM has not requested any modifications in the manufacturing process of the parts.
The National Highway Traffic Safety Administration had given General Motors (NYSE: GM) and other automakers like Ford and Toyota until Sept. 22 to reply to a request for information in the investigation. GM says other makes and models of GM trucks use the same part, but those vehicles are not included in the investigation.
In responses to NHTSA's requests for information, GM claims that the knuckle fractures are the "consequence -- not the cause -- of vehicle crashes," according to agency documents. The automaker says analysis of the incidents, accompanied by material analysis and field performance and testing, indicates that wheel separations or suspension collapses occurred after impact.
I know it's also old, but still. Anyone know anymore about this possible issue?
Oh and:
from what used to be automags.org posted:
I thought y'all might enjoy this. This is a brand spankin' new GM H2 in all its "glory" that went for a little joy ride at La Sierra University in Riverside, CA (my gf works for PR there and took the pics, good job DJ!).
Heres what happened: This chick took her mom and kids out for a ride at 3AM and saw construction and dirt and so forth around the campus. She thought to herself "hey, this is an H2, i saw it in a commercial and it could do anything. Its an all terrain vehicle, right?"
She then procedes to dive around campus for a while and then broke through the cable barrier (took 2 tries) that prevents idiots from running into the schools brand new samaritan statue. she then hit a 1' dirt curb at about 40mph, and then right into the statues cement base. Needless to say, the curb and cement were victorious.
When asked why she did it, she repiled "I wanted to jump the statue, i saw it on tv"
She wasnt drunk or under any kind of influence and yes, the kids were inside when it happened. This is all very true. here are the pics:
(click for original size)
[IMG]http://i50.tinypic.com/2e3ogti.jpg][/IMG]
Also, yes, I know this was all hosted on fuh2.com and I'm not affiliated with them. No, I don't know if the story is real.
I actually read an article about an H2 or H3 driving around a parking lot and accidentally bumping into the curb, breaking a knuckle, but I can't remember where it was. Anyone know what I'm talking about?
edit: I am an idiot
Dilbert. fucked around with this message at 03:15 on Nov 20, 2009
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Nov 20, 2009 02:58
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Nov 12, 2009 09:59
