Just enjoy your truck. It is not as common as it may seem by this thread with suck a large gathering of Duramaxs. No matter the truck you choose they all have their problems there are more achieving and approaching 300,000 miles than braking.,.
Broken Crankshaft Count?
- Thread starter EDP
- Start date
Just enjoy your truck. It is not as common as it may seem by this thread with suck a large gathering of Duramaxs. No matter the truck you choose they all have their problems there are more achieving and approaching 300,000 miles than braking.,.
Doing my build now with a new lml crank makes me sick as it's all I can think about now 
Sure hope this isn't common ^
Sure hope this isn't common ^
Add one more lbz to the list. Early lly code 123,000 miles
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk
Most of the broke cranks that my buddies at different GM dealers in different parts of the country see are in stock trucks between 160 000 and 260 000 km. It isn't just these sites that are seeing the majority. It's more rampant than GM wants to admit and indiscriminate on the year.
As of currently, I believe the only true fix is the Wagler Callies or Winberg crank that runs the narrower Hemi journal rods with a larger, more radiused and larger fillet... none of those have broken to my knowledge
If I remember right I read that the narrower journal wasn't supposed to work great for a daily driver? Correct me if I'm wrong.
This Callies you mean
If someones broke one, they must have dropped it on the concrete unloading it... Mine haven't spun under their own power yet.
The narrow journal approach and larger filet is being used by several manufactures I spoke with while exploring options. Stock and stroker.
BTW: I've been working with Ivan at Fluid Damper on getting a zero balance setup to test next month on the engine dyno. Maybe some of you guys interested internally balanced setups might call him and express your interest in seeing this. His engineers keep pushing it back.
Attachments
Last edited:
Add another to the list 369k LLY going to put an LML short block in with 29k miles. Wish me luck
Callies doesn't do them in other than stock stroke and bearing diameter. Winburg does though. I have a couple of Winburg 3.650 stroke cranks with the narrow journal in dmax diameter on the way for a few builds we are doing. Then some stock stroke Callies cranks for a few other high power street trucks, including my personal truck.
Oh and we just tore down another LLY with a broken crank at the #2 main. Truck had a Danville 68 Stg 2R, 60 overs, and 10mm stroker on conservative tuning to keep rods happy. Hadn't been raced or pulled, just snapped while driving.
Looks like GM may of finally fixed the broken crank issue with the new L5P Duramax guys!!! Wonder if we will be able to use this crankshaft in builds with the excitor ring moved to the back
Attachments
Last edited:
Me. Mine is stock internals and fuel but it's always in my mind. I occasionally feel an odd bit of harmonics from the motor at idle which scares me but I guess I'll drive her till she let's go somewhere
Now I'm concerned... seems like it's all a matter of luck. Mine almost seems to pulse occasionally at idle and now the crank is on the list of possible causes..
I look at it from time to time but never do i live my life in fear, if it goes... It goes. If anyone is afraid of breaking a crank sell your truck and buy a Prius