LBZ: Broke my crank
- Thread starter BHoward6.6
- Start date
My point is that there is very little info there. Like I said I have seen zero LLY/LB7 crank failures and about a dozen LBZ/LMM failures in our shop. I do agree power. Has little impact as all of the failures I have seen personally have been stock trucks, although most were heavy medium dutys or tow heavy quite a bit.
I find it quite interesting that I have seen a bunch more failures of one vs the other than the poll shows, that's why I suspect there are more variables that need to be factored in.
I find it quite interesting that I have seen a bunch more failures of one vs the other than the poll shows, that's why I suspect there are more variables that need to be factored in.
Agreed.
I don't work at a GM dealer, all I have is the forums & sometimes you have to read between the lines. That's why I was asking for more info, better pics & broken parts.
I may start thread and offer to pay shipping on crank pieces if they can be cut off. Flat rate boxes aren't bad.
We should start a fund to help cut the shipping cost for you :hug: it would be great figure out why they randomly fail.
I think this is a good idea guys burndown may be able to find something under the microsope that we are unaware of and he may find something that could help solve this issue you never know? It could be just a couple bad apples or he might find some other good intel for us
Absolutely, When I pull the rest of the crank, I will pm you for your address and send you the cut off pieces.
Also I'm not claiming to be able crack the code (no pun intended) but Id like give it a shot. I have few avenues that the average guy doesn't have & some training, experience with failure analysis. I have a hunch that it is just a few bad apples out of a ton of good ones. It would be nice to try and chase some answers down with out any ulterior motives clouding the results.
No doubt! I unfortunately don't get much chance to do any investigation as I spend most of the time trying to get the customer covered under warranty. Any answers I get from GM are usually clouded in legal bs, like it was on "fire" isn't an acceptable term but experienced a thermal event instead. Which bring the new description, a thermal event with visual indicators!
I Think that Burn Down is on to something for sure. It still confuses me though as to why there were still failures of billet custom cranks in some builds. Maybe they broke in a different way or place...we may never know since pictures don't seem to exist. Maybe the actual issue was always made worse by 1 or 2 other issues like flexing mains and tight bearing clearance. if I can get Dylan to pick up his phone, ill have him send you his lb7 crank for analysis.
Last time I talked with Todd (6-7 months ago) He closed shop and said he was going to start working from home.. But yes Todd ended up with a bunch of parts from my original build, what he did with them or if he still has them I have no idea..
The answer to your text yesterday is yes (having cell phone issues) and if you talk to Todd ask him if he still has the crank I gave him out of the motor I bought from you (he was going to have it keyed for me).