spun crank bearing on 06

[JHern]

A friend of mine is having the engine in his 06 CTD replaced at approx 40k miles for a spun crank bearing. Dealer tells him they have done this 4 or 5 times. This is the first i have heard of this & unable to find anything in the search forums. has anybody heard of this or is dodge dealer blowing smoke. My current truck is an 06 CTD as well & hope this is not a common problem. Thanks in advance.



Mine 2006 CTD,QC,4x4,G56,LB,Jacobs exhaust brake,Ultralinings bed liner,Air lift air bags,988s,Toyo MT 295/75/17

 

[wcjp]

I was reading "Click and Clack" some time ago. Some guy's brother managed to do this on a new Honda. Over revved the engine immediately after cold start in middle of winter in a Northern State.

 

[KWilkinson]

I replaced one engine in a 05 for the same reason... guy revved the hell out of it when it was stone cold -10 degrees #@$%! Funny thing was I just put a set of injectors in it and he was leaving the dealer lot when it happened, and I saw him leave...

 

[JCasper]

I drive very easy until my engine is up to temp.

 

[Heavyweight]

I second that JCasper.

 

[daytripper63]

I hate to be the one to say this...

But I would have to lean towards the owners driving habits such as revving a cold engine etc. andthe spun bearing as being a self inflicted problem and not a Cummins problem.

 

[JCasper]

I hate to be the one to say this...

But I would have to lean towards the owners driving habits such as revving a cold engine etc. andthe spun bearing as being a self inflicted problem and not a Cummins problem.

Very true. You shouldn't run any engine hard when it's cold.



Like I said above I always let my truck get warm, then it's go time. :-laf



Think about the tolerances changing from 0*F to 190*F. There is going to be some different things happening inside.

 

[HBarlow]

Very true. You shouldn't run any engine hard when it's cold.



Like I said above I always let my truck get warm, then it's go time. :-laf



Think about the tolerances changing from 0*F to 190*F. There is going to be some different things happening inside.

I agree with both of the previous posters. I'd be suspicious of driving habits, who did the oil changes with what products, and what mods the engine may have had. I've never heard of another Cummins engine with a spun bearing.



I have 225k miles on my '06 and my previous '01 had 325k on it when I sold it. It works daily and now has about 340k on it. I know transporters who have put between 600k and 900k on their Cummins engines, working everyday, without spinning a bearing.



Not likely to happen with proper use and service.



Harvey

 

[betterthanstock]

Although given that Cummins changed it without BS, maybe they knew they had a bad batch of improperly machined engines.



BTW, what were the symptoms? Low oil pressure, knocking noise, completely seized?

 

[DPKetchum]

Big chicken operations around here have back up generators. Best I can tell they are big Detroit diesels. Once a week at a preset time they fire up from 0 rpm to goverend rpm and back off a hair. Temp plays no bearing. Power failure same deal from 0 to wide open and a slight back off. Some have been in place for years with no engine problems. So If I had to bet I'd say Cummin had a clearance or oiling issue on those engines.

 

[EGaskamp]

Wow! Thats crazy. Never heard of in on the 3rd gens, but I haven't been on the 3rd gen side of the world that long! LOL

 

[KWilkinson]

Generators dont usually see the load that even a unloaded pickup engine will see...

 

[rbattelle]

Big chicken operations around here have back up generators. Best I can tell they are big Detroit diesels. Once a week at a preset time they fire up from 0 rpm to goverend rpm and back off a hair. Temp plays no bearing. Power failure same deal from 0 to wide open and a slight back off. Some have been in place for years with no engine problems. So If I had to bet I'd say Cummin had a clearance or oiling issue on those engines.

I was thinking about that too. Maybe peak RPM on those engines is low enough not to matter? Like 1500 or 2000 RPM? They're not run at 3600, are they?



This guy spun a rod bearing, or a main bearing?



Ryan

 

[JHern]

I want to thank every body for the response I dont think its driving habit he lives in a pretty cold area but he is a mechanic by trade on every thing from 1/2 ton pickups to large fire trucks. Pretty sure he changes his own oil & is very competent. The truck is stock no mods at all & not sure what he heard or happened to tip him off to the problem. I am leaning more twords a possible defect in the machining not sure. Thanks again & please keep the responses coming if any body knows differently.

 

['strokeThis_'07]

Some of the most cobbled-together POS vehicles Ive seen are mechanic-owned. But Id agree that its more driver error than a Cummins thing. Ive only heard of a few instances where this has happened.

 

[DPKetchum]

Don't know the rpms but it sure dosen't sound like any 1500/1800 pm. You can't hardly bare the noise if any where near them. Most test weekly late evening . One will supply enough power for like 4 400 foot long+ houses. If power goes out they come on loaded.

 

[sag2]

Cummins engines generally NEVER have oil related failures, especially at 40k. Without seeing the exact failure it is impossible to tell, but I tend to agree it was externally caused, not defective.

 

[betterthanstock]

Cummins engines generally NEVER have oil related failures, especially at 40k.

Generally, never? Anyway, if it's manmade, it will fail. I remember a couple years ago the Ferd 6. 0 had a particular number bearing that would fail. They just replaced (probably with other factory rebuilt) the affected engines. I vaguely recall some Chrysler gasser engines a few years ago having had a similar recall. Usually it's the same number bearing in all affected engines, due to the automated machining and inspecting. If I had to venture a guess, it's either a too rough a finish on the crankshaft, or too loose a clearance in the block or rod.



I guess if you really worry, then compare his engine serial number with yours. If it's apart by a lot, it probably got caught and fixed before too many engines had the problem, but it's possible that one dealership got a dozen bad engines, because they built his order that day, and all the bad engines got shipped to the same place.

 

[Ponz]

All of the stand-by generator systems I've ever seen have over-sized block heaters to keep the engines ready to rock & roll. Ponz