so, thankfully this isnt my truck but it is a good friend of mine, he recently installed a edge cts race and a 4in turbo back exaust i got a call this morning and he had broken down last night while highway driving to utah. He got the truck put on a trailer and towed back to idaho where the mechanic that works for his company said the crankshaft was broken, im no mechanic and i dont have all the details but i will do my best to keep you guys posted on what happens ask whatever you want ill try to answer but like i said i dont know anymore than what i hear.if im wrong im wrong ill do my best to keep you all updated and my spelling and punctuation sucks i already know;)

Wow. More and more of these are popping up.

Quality control issue is to blame I believe. Edge CTS isn't ALL that hot. :(

he is praying for warranty hopefully it works out for him

he is praying for warranty hopefully it works out for him

They will comb it over I know. Did he put the DPF back on before taking it to the dealer?

Wow. More and more of these are popping up.

Quality control issue is to blame I believe. Edge CTS isn't ALL that hot. :(

I don't see it as quality control issue as it hasn't happened stock. My truck tows 6 tons and gets used off road and I've yet to break anything, touch wood.

I don't see it as quality control issue as it hasn't happened stock. My truck tows 6 tons and gets used off road and I've yet to break anything, touch wood.

I'm not jumping on the debate train on this one. I will tell you this, if the truck couldn't take the added 150(?) HP on top of the motor and not live, there's something wrong. And I'm not saying the motor was designed for it, but, many are running A LOT more power than that with no crank issues, pistons seem to go first on these newer ones. Cranks are becoming more popular it seems.

And just because your truck is stock doesn't mean it's fail proof. Many of the shops have seen stock trucks with broken cranks.

I'm glad your stock truck is doing well. Mine isn't stock and is doing well also. So, leave it at that.

You can read through this post of one. http://www.dieselplace.com/forum/showthread.php?t=354347

Brian

truck is at the dealership, returned to stock we will see what happens i told him he was probably screwed but he seems optimistic ill keep you guys posted on anything i find out ill stop by the dealer today if the truck is apart ill try to get some pics

I always thought the transmission was the weak link with extra power, so I got that built. Now I'm wondering if I made a big mistake sinking all this money into my LMM, so I can run my PPE for extra performance, if now I have to worry about cracked crankshaft or piston. I was under the impression the Duramax was bullet proof as long as you didn't get ridiculous with power. We don't hear Powerstroke or Cummins having these problems, so whats going on? Are they using cheaper parts to save money. If that's the case I should have done more homework before I decided to program my truck.

How much does a performance crankshaft installed cost for the LMM? Just trying to plan ahead now.

I always thought the transmission was the weak link with extra power, so I got that built. Now I'm wondering if I made a big mistake sinking all this money into my LMM, so I can run my PPE for extra performance, if now I have to worry about cracked crankshaft or piston. I was under the impression the Duramax was bullet proof as long as you didn't get ridiculous with power. We don't hear Powerstroke or Cummins having these problems, so whats going on? Are they using cheaper parts to save money. If that's the case I should have done more homework before I decided to program my truck.

How much does a performance crankshaft installed cost for the LMM? Just trying to plan ahead now.

It's a crap shoot! Some hold the power and some don't. But it really comes down to the bottom line on how you treat it. If your not pedal to the metal ALL the time the truck should do you good.

The 6.4 I don't really no anything about internal wise, I'm not sure if they're puking gaskets or anything. The Cummins crack pistons just like we do.

Bottom story, don't dog the truck all the time and you should be good for a long time.

I'm sorry if I sound disappointed, This is my first diesel. I had a Ford F250 with the V10. I wanted a diesel, so after what I thought was a lot of home work, I bought the Chevy LMM. Now I must say, I love this truck and it brakes my heart to hear about the older Duramax having less problems with major engine parts. It sound like corporate cutting cost and now problems are showing up with the same mods the older trucks have been doing for a while. I plan on keeping this truck for it's life span. I'm just very confused with some people, who are confident you can mod it with little problems and others who experience major problems. I don't dog my truck all the time, but I think it's really a crap shoot and I don't like to gamble. I try to calculate every move.

Is this something that could maybe be alleviated some by adding some form of fluid or dynamic damper to help with harmful and harmonic vibrations? Or does it just comes down to a the casting quality...

I'm sorry if I sound disappointed, This is my first diesel. I had a Ford F250 with the V10. I wanted a diesel, so after what I thought was a lot of home work, I bought the Chevy LMM. Now I must say, I love this truck and it brakes my heart to hear about the older Duramax having less problems with major engine parts. It sound like corporate cutting cost and now problems are showing up with the same mods the older trucks have been doing for a while. I plan on keeping this truck for it's life span. I'm just very confused with some people, who are confident you can mod it with little problems and others who experience major problems. I don't dog my truck all the time, but I think it's really a crap shoot and I don't like to gamble. I try to calculate every move.

Trust me, for awhile I always wanted one when the first come out, but I waited and bought mine new. Now I myself has to worry, but I honestly don't. I don't use the truck hard, I've made about 30 passes at the drag strip, and the occasional wide open.

If you want to prepare, I would find a another motor and start the build on it. Rods, Pistons, etc..

Is this something that could maybe be alleviated some by adding some form of fluid or dynamic damper to help with harmful and harmonic vibrations? Or does it just comes down to a the casting quality...

A lot of discussion so far on this, but from what I read it's a quality control issue. We may never know...

Trust me, for awhile I always wanted one when the first come out, but I waited and bought mine new. Now I myself has to worry, but I honestly don't. I don't use the truck hard, I've made about 30 passes at the drag strip, and the occasional wide open.

If you want to prepare, I would find a another motor and start the build on it. Rods, Pistons, etc..



A lot of discussion so far on this, but from what I read it's a quality control issue. We may never know...

Yeah thats what Ive been looking into. Guess Im going to get the ball rolling alil faster now since these last few threads.

Sounds like we need to find out why the crank broke, rather than worry about all the rest of the chatter. The crank may have had an imperfection in the casting, the machining may have been on the outer edge of tolerance, the block (bearings) may have an alignment problem, there may have been an overspeed of the engine and on and on. GM will determine the cause of failure and it would be nice it they will share that, not likely?

As far as crankshafts breaking, there are a few that break in all makes and models of gas and diesel engines and no, you don't hear about them because if they start to become a problem you need a recall before you have a "Toyota PR Problem".

GM as well as the other manufacturers keep a close eye on their failures as they increase horsepower etc and for the most part offer better quality parts to reduce these problems because they can't afford negative publicity.

As for warranty, good luck! IMO

If you want to prepare, I would find a another motor and start the build on it. Rods, Pistons, etc..


You better consider a new aftermarket crank too! It looks like its a problem now.

If you want to prepare, I would find a another motor and start the build on it. Rods, Pistons, etc..


You better consider a new aftermarket crank too! It looks like its a problem now.

When I build one she aint going to be stock.:D

I guess I'm just ignorant of the problem, but out of the thousands and thousands of LMM D-max's made, on this board there has been a couple instances with problems with a crankshaft. Is this really a cause for concern? Seems to me it would fall into the 1-2% of issues with any vehicle, that every manufacturer has, just a product of mass production. Just wondering if this is really a concern, IMO, just a couple unlucky people. Chris

It actually may be by design that the crank shaft breaks first, its certainly a lot cheaper to fix than the transmission. I know on Corvettes the half-shaft is the weak link and people will by an after market part if ther're going to soup up the motor.:)

The crankshaft broke in my '01 - LB7 shortly after the PDI was done with less than 60 miles on it. The problem was the block casting and bearings being out of line. Dealer replaced the motor and I had nothing but problems from their install. Shop had the truck 3 out of 6 weeks after the new motor. Turned into a Lemon buy back and I got an '02 that the ex-wife is still running.

well the truck wasnt taken apart when i stopped by yesterday and im gonna be out of town but as soon as i hear anything ill let you all know. Some more info in the truck 09 crew cab 23,xxx miles tuner and dpf delete were done about 2500 miles ago. he says he was on the 80 hp tune with cruise control on when the noise happened he pulled over and called for a tow i'm definitely harder on my truck than he was on his.

I really dont see the tuner being the cause. Wish he could get someone other than GM to see what the cause of the failure was.

I really dont see the tuner being the cause. Wish he could get someone other than GM to see what the cause of the failure was.

Really? 21,000miles with no issues and then 2,000miles after tuner and deletes his crankshaft goes...

I rely on my truck to put bread on the table... that's why they stay stock

-Rob

I'm not jumping on the debate train on this one. I will tell you this, if the truck couldn't take the added 150(?) HP on top of the motor and not live, there's something wrong. And I'm not saying the motor was designed for it, but, many are running A LOT more power than that with no crank issues, pistons seem to go first on these newer ones. Cranks are becoming more popular it seems.

And just because your truck is stock doesn't mean it's fail proof. Many of the shops have seen stock trucks with broken cranks.

I'm glad your stock truck is doing well. Mine isn't stock and is doing well also. So, leave it at that.

show me a stock one. yeah, maybe they "should" be able to take a mild tune but why should they? No one said stock was fail proof and they occasionally have problems in a small% in build...but I sure as hell would trust stock over tuned...

Really? 21,000miles with no issues and then 2,000miles after tuner and deletes his crankshaft goes...

I rely on my truck to put bread on the table... that's why they stay stock

-Rob

Yeap. This motor was probaly going to fail anyways. 80 horse tune. A heavy load towing will put more strain on the bottom end than that tune. I'm not saying tuning is helping these motors live any long but 23k on the odometer and 2k with a tune. Now if was talking bout my motor. You could blame the extra power and driver.

I agree it was probably a defective part but I also think your SOL on this because of the modifications.

Yeap. This motor was probaly going to fail anyways. 80 horse tune. A heavy load towing will put more strain on the bottom end than that tune. I'm not saying tuning is helping these motors live any long but 23k on the odometer and 2k with a tune. Now if was talking bout my motor. You could blame the extra power and driver.

good post. Im curious now what power yo're putting down from that bad boy of yours? Mad power is capable from these engines of that there's no doubt

-Rob

I guess I'm just ignorant of the problem, but out of the thousands and thousands of LMM D-max's made, on this board there has been a couple instances with problems with a crankshaft. Is this really a cause for concern? Seems to me it would fall into the 1-2% of issues with any vehicle, that every manufacturer has, just a product of mass production. Just wondering if this is really a concern, IMO, just a couple unlucky people. Chris


I agree. A person on the internet knows a guy that had a crank break at 23k. So what?

There are 106,xxx members on here, all of whom keep tabs on all the other Dmax trucks they know of. You know you'll hear about the odd failure, but keep in mind the millions of trouble free miles.

good post. Im curious now what power yo're putting down from that bad boy of yours? Mad power is capable from these engines of that there's no doubt

-Rob

I haven't had a chance to put it on the rollers yet. But she should be 600-650 with the meth. I've been running atleast a 400 horse tunes for the last 70k. I feel luck with not having any real issuse but also running on borrowed time.

Obviously Gm Has A Cranckshaft Problem Tune Or No Tune I Haven't Heard Of A Tuned Ford Or Dodge With Crank Problems Hello Were Does The Problem Lie Here Tuner Or Gm Junk Crank And Pistons. Had A Buddy In An 06 Lly 50,000 Miles On Truck Never Been Altered Or Tuned I Know This For A Fact And Melted 2 Pistons WHILE HAULING A SKIDSTEER THE TRAILER WEIGHED 4500 POUNDS AND THE SKIDSTEER WEIGHED 7000 POUNDS GM TOLD HIM HE WAS HAULING TO HEAVY OF A LOAD Gm Denied Warranty On His Truck He Paid 16,000 For New Engine LAST I NEW THESE TRUCKS WERE RATED TO HAUL WHAT 16000 POUNDS

Like MB-1 said there are x-members here and really there are very few failures stock or tuned that I see?Yes they exist but the numbers are a very low %?People who mod know the risks.I just don't have the $$ to make the repair so I opt to stay at the factory specs.Plus I dont like real fast like I use to lol?If I did it would have two wheels and go over 200 out of the box for under 15k lol.

Obviously Gm Has A Cranckshaft Problem Tune Or No Tune I Haven't Heard Of A Tuned Ford Or Dodge With Crank Problems Hello Were Does The Problem Lie Here Tuner Or Gm Junk Crank And Pistons. Had A Buddy In An 06 Lly 50,000 Miles On Truck Never Been Altered Or Tuned I Know This For A Fact And Melted 2 Pistons WHILE HAULING A SKIDSTEER THE TRAILER WEIGHED 4500 POUNDS AND THE SKIDSTEER WEIGHED 7000 POUNDS GM TOLD HIM HE WAS HAULING TO HEAVY OF A LOAD Gm Denied Warranty On His Truck He Paid 16,000 For New Engine LAST I NEW THESE TRUCKS WERE RATED TO HAUL WHAT 16000 POUNDS

He needs to lawyer up. That kinda of stuff is BS.

sorry guys its been crazy at work im gonna call my buddie tommorow and see whats going on

I always thought the transmission was the weak link with extra power, so I got that built. Now I'm wondering if I made a big mistake sinking all this money into my LMM, so I can run my PPE for extra performance, if now I have to worry about cracked crankshaft or piston. I was under the impression the Duramax was bullet proof as long as you didn't get ridiculous with power. We don't hear Powerstroke or Cummins having these problems, so whats going on? Are they using cheaper parts to save money. If that's the case I should have done more homework before I decided to program my truck.

How much does a performance crankshaft installed cost for the LMM? Just trying to plan ahead now.

Crankshaft may be made oversea's with cheaper grade of steel, and 10 times out of 9 with no quality control;)

Crankshaft may be made oversea's with cheaper grade of steel, and 10 times out of 9 with no quality control;)

That would be news to me... got anything to back that up? :eek:

That would be news to me... got anything to back that up? :eek:

I wish.........we may never know were the suppliers are or were the steel is made....... .hell our crankshaft might be made in china and shipped over here who the hell knows:mad:

Crankshaft may be made oversea's with cheaper grade of steel, and 10 times out of 9 with no quality control;)

BINGO, thats my opinion. I see it in our race shop all the time. Eagle and Scatt cranks come out of the box and are bent and or scratch real easy while balancing the rotating mass. That means a real soft material used(junk). Impurities all thru the steel. Damage not from pakage or handling but from junk steel used. Now when you step into a Sony Bryant crank you pay the big bucks but it goes with the saying "you get what you pay for".

sorry guys its been crazy at work im gonna call my buddie tommorow and see whats going on

Any updates?

ive tried to call him a few times in the past week i know the job he is working at is in the middle of nowhere with no cell service. so im waiting to hear about it also i promise ill post as soon as i hear something.

Manufacturing or Casting China or India: Quality is as good as your inspection...not your expectation. ;)

I've actually been in the plants where they make some of the V-8 Blocks and cranks in Saginaw & Flint, Michigan. I don't know where they make the 6.6L LMM. I sort of doubt that any of the casted parts come from China or India; not that GM would'nt want to do it.


Crankshaft may be made oversea's with cheaper grade of steel, and 10 times out of 9 with no quality control;)

If it is made in another Country it has to be plainly visible on the product. Are you saying that you see these cranks are manufactured in China?
:confused:
Crankshaft may be made oversea's with cheaper grade of steel, and 10 times out of 9 with no quality control;)

BINGO, thats my opinion. I see it in our race shop all the time. Eagle and Scatt cranks come out of the box and are bent and or scratch real easy while balancing the rotating mass. That means a real soft material used(junk). Impurities all thru the steel. Damage not from pakage or handling but from junk steel used. Now when you step into a Sony Bryant crank you pay the big bucks but it goes with the saying "you get what you pay for".

ugh this is the problem with forums. You get one idiot saying one thing, then someone else takes that and twists it slightly, then before long it starts going around the internet. I wouldnt be surprised if it two weeks I read on the dodge forums that "yeah, did you hear? The duramax crankshafts are cast in india out of pot metal from japan! Its true"

unless you've seen it first hand (and this goes with anything), shut it. None of this "I heard" or "my buddy said" or "Probably...."

ben

ugh this is the problem with forums. You get one idiot saying one thing, then someone else takes that and twists it slightly, then before long it starts going around the internet. I wouldnt be surprised if it two weeks I read on the dodge forums that "yeah, did you hear? The duramax crankshafts are cast in india out of pot metal from japan! Its true"

unless you've seen it first hand (and this goes with anything), shut it. None of this "I heard" or "my buddy said" or "Probably...."

ben

x2, this is why I posted in this thread about this being an issue in just a couple LMM's out of a few hundred thousands produced. Less than half a percent so far have "had" issues. I'm not losing sleep. Chris

What all the Duramax parts are made in Japan!!! :eek: And assembled in Cambodia by 7 year olds that don't wear shoes!!:eek:):h

If I had 18,000 posts right now, I'd call you an "Idiot". JK

Worse thing about a Forum is that some people think it's "OK" to call others names...all while hiding behind their computers.

I think some folks just take things a bit too serious. Simmer down....:coolio:

What all the Duramax parts are made in Japan!!! :eek: And assembled in Cambodia by 7 year olds that don't wear shoes!!:eek:):h

Out of those 18,000 post how many of them do you think were actually helping some one out? :p:

Scurries away before he can be called a name...........

Good question? I guess you'd have to look through all the posts...but I suspect you already know.:D

Out of those 18,000 post how many of them do you think were actually helping some one out? :p:

Scurries away before he can be called a name...........

guys that was not directed at anyone in particular...its just that for years Ive seen problems like this get blown out of proportion, and everyone gets scared away when there is really no need for any worry.

This is an isolated incident. How many threads have there been about this? 10? 15? Out of how many million duramax's have been produced since 2001?

I apologize if anyone took it personally as if I was targeting "them" alone... :o:

but really......for the thousanth time...people come to forums with their PROBLEMS! For every thread/post you see about a duramax that just blew up, theres hundreds of thousands of others that made it through the day just fine without any problems.

many of us got higher post counts from back when we were moderators and we accumulated lots of endless chitchat in the 'back room'. ;)

If I help out people around here or if im totally worthless is your own opinion...

ben

That's cool Ben. Appreciate your follow up. No hard feelings.

guys that was not directed at anyone in particular...its just that for years Ive seen problems like this get blown out of proportion, and everyone gets scared away when there is really no need for any worry.

This is an isolated incident. How many threads have there been about this? 10? 15? Out of how many million duramax's have been produced since 2001?

I apologize if anyone took it personally as if I was targeting "them" alone... :o:

but really......for the thousanth time...people come to forums with their PROBLEMS! For every thread/post you see about a duramax that just blew up, theres hundreds of thousands of others that made it through the day just fine without any problems.

many of us got higher post counts from back when we were moderators and we accumulated lots of endless chitchat in the 'back room'. ;)

If I help out people around here or if im totally worthless is your own opinion...

ben

so I finally got news from my friend they did not warranty his motor (we all saw that coming) new motor in and in stock form the dealer said that the last 5 tunes were not stock tunes, he says his new motor gets around 15 mpg where with the first one was lucky to get 12 mpg. dont know what to speculate about that.

so I finally got news from my friend they did not warranty his motor (we all saw that coming) new motor in and in stock form the dealer said that the last 5 tunes were not stock tunes, he says his new motor gets around 15 mpg where with the first one was lucky to get 12 mpg. dont know what to speculate about that.

How much $$$? And, do you know which tune he was running on the Edge at the time?

he said around 10,000$ not the type to inflate things says he was on one of the lower tunes im not sure which one

ugh this is the problem with forums. You get one idiot saying one thing, then someone else takes that and twists it slightly, then before long it starts going around the internet. I wouldnt be surprised if it two weeks I read on the dodge forums that "yeah, did you hear? The duramax crankshafts are cast in india out of pot metal from japan! Its true"

unless you've seen it first hand (and this goes with anything), shut it. None of this "I heard" or "my buddy said" or "Probably...."

ben

I'd have to agree with this completely.

Got any pics of the damage?

Got any pics of the damage?

x2

ill see if he got any taken ive been out of state working sense this happened it may take some time but I promise ill try. dont know if he even had any pics taken i wanted to stop by and take some while I was there but the dealer didnt have it taken apart before I left