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
After breaking a crank in my first built motor I have reason for concern....
Broken Crankshaft Count?
- Thread starter EDP
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After breaking a crank in my first built motor I have reason for concern....
I understand there is alot to lose, but I just don't worry about what i cannot control.
na i have a game plan already figured out if the time comes. its helps that i have not had one break on me personally but it gives me a chance to do upgrades inside ive wanted to do
. kinda like when i put twins on and knew i would be building the engine at some point soon. 2 months later they shrank on me and off i went for the build.
Mines at idle and right off idle 700-800 RPM's them levels out until 120-1600. No load
Pretty sure that's the nature of the beast, my LLY shone pretty bad under part throttle with the stock motor
Just got a lml in today broken crank 129k miles bone stock.
Guy said it made a fuel knock then died so I assumed cp4 when I went to crank it made a God awful racket and then we started digging no crank sensor code or anything but the crank is definitely broke
Guy said it made a fuel knock then died so I assumed cp4 when I went to crank it made a God awful racket and then we started digging no crank sensor code or anything but the crank is definitely broke
Add me to the list. My crank broke in my 06 LBZ. It was twinned but was on my stock tune and it just broke cruising down the highway under no load has 149k on the clock.
Now I'm gonna stop reading this thread because I'm in middle of a new build using a new lml crank and af cam and reading through this is making me wanna sell everything and abandon ship
Now I'm gonna stop reading this thread because I'm in middle of a new build using a new lml crank and af cam and reading through this is making me wanna sell everything and abandon ship
Short of using a more massive crank with wide radius fillets, rolled fillets are THE fix for fatigue cracking at the crank journal. This technology has been proven for decades on nodular cranks. I don't know why it took GM 16 years to implement it on the DMax. Given the gasser-crank dimensions of the DMax crank it should have had rolled fillets from day 1.
Well I know LML cranks are prone to breaking just like the others, but I feel like I made the right decision putting a brand new lml crank in my lmm build. I wouldn't be able to sleep knowing I had a 150k lmm time bomb in my brand new motor.
THE improvement is the enlarged rod journals. That increases the rod/main journal overlap greatly increasing the cross section. The throws are just too thin and do not provide adequate resistance to twist.
Everything else is icing on the cake.
More than likely that has to do with the years of service and probably less modded lml's running around. Time will tell. I bet the data source is a tad misleading in that manner vs. having a set number of variables.