Any opinion on the 6.7 engine?

[AClayton]

I have to agree..... the early 07' 6. 7's appear to have the worst reputation. I have been researching the newer trucks for a couple of yrs now and many say the 09' and up trucks are the best to get used. However, they are not fuel efficient like the pre-emmision trucks. TDR is not the only resource for Cummins equipped vehicles! I will say it is the best resource but to make a bold statement based on one 07' owner not having any problems is kinda ridiculous at best. And If I remember, he is a transporter. That means he used the truck as it was intended. Not everybody was aware of the emmisions crap requiring so much special consideration when operating the vehicle... . meaning it requires the vehicle be challenged regularly.

That is one of the reasons I don't purchase an emmision vehicle. I use my truck unloaded as well! I decided to keep my old 01'..... it gets better mileage, I have no driving restrictions and it still runs very well. I wish I had the more refined cab and 6 spd auto but I truly hate what the Govt. has forced us to do with these new trucks. I had my truck painted, added new wheels and Michelins, installed new bumpers and am considering an air suspension for the rear to improve the ride.

 

[HBarlow]

As I stated in my first post, negative comments will be heard from some of those who don't own a 6. 7, very few from those of us who do own one.

 

[RVTRKN]

I know of only one '07. 5 or '08 that was a buyback.

Well its official then, only one 07. 5 CTD had a problem. :-laf:-laf:-laf:-laf:-laf:-laf



Are you kidding me, why do you think they modified the turbo by adding cleaning ports and all the turbo's that were replaced as a secondary option. First option was Turbo cleaning and modification and then it was replaced as a secondary option, when D/C knew it was coming back needing a turbo. That is what the Car-fax is for, Bonehead.

 

[HBarlow]

Perhaps you were unable to read my first post:

"

If you ask folks who don't own one and never have you'll often hear negative comments. Most of us who own one are very pleased with our trucks. My '08 has 120k troublefree miles. So far it's been a great truck.

TDR member EB, who is an oilfield hotshot hauler, has more than 450,000 miles on an '07. 5 6. 7 cab and chassis. His truck pulls a huge flat bed tandem dual wheel gooseneck trailer every day loaded with heavy oilfield equipment. He has had a couple of maintenance item failures but the engine, Aisin six speed transmission, and basic truck have been troublefree for him.

Another TDR member who has disappeared, TulsaOkie, is also a commercial hauler. He put similar miles on one before he sold it and bought another new one.

Some of the early '07. 5s and '08s that were only used for short trip basic transportation, aka grocery getters, had smog issues with dpfs, egrs, and turbos. Minor hardware and software changes by Cummins/Ram eliminated those issues but the fact remains, because of the emissions crap forced on the manufacturers by the Economy Punishment Agency, these new trucks are not well suited for a daily unloaded short trip duty cycle. If your duty cycle will allow the truck to work as intended they are great trucks.

"

 

[Bob4x4]

I only work on 1 cc to every 50 pickups (6. 7) for cel's

 

[RVTRKN]

Thanks Bob, that is my point of comparing a C&C to the reg truck, but the early 6. 7 in the regular trucks are more suspect to having issues. My C&C has had only two cel's and were caused by the right side battery being weak.



HBarlow, I did read your first post, and more than once, and the replacing of the Turbos are not a minor repair or cost, so if the OP doesn't run a Carfax, the Turbo may never have been replaced and would be a very expensive out of warranty repair.

 

[Wygate]

I have had a TON of problems w/ my 09, most documented here on TDR and Ram has done everything except a buy back (yes that includes cash to help ease my pain)

That said the truck when working for me dose pull and drive very nice. The auto and ehx brk is wonderful!

Keep doing homework and I would take it to a dealer and have it read and read the work history if it has been serviced @ a dealer

My 2 cents

 

[Jim W]

Well its official then, only one 07. 5 CTD had a problem. :-laf:-laf:-laf:-laf:-laf:-laf

Are you kidding me, why do you think they modified the turbo by adding cleaning ports and all the turbo's that were replaced as a secondary option. First option was Turbo cleaning and modification and then it was replaced as a secondary option, when D/C knew it was coming back needing a turbo. That is what the Car-fax is for, Bonehead.

I have an early 08 built and sold in 07, so I have most of the 07. 5 features on the truck such as axles and steering gear. I have been too the dealer six times since I bought the truck five times for oil changes most where free and one time for a recall to provide a flash to the engine ECM. Since then the truck has been trouble free and never ever been back to the dealer. I do all my own maintenance and a CAR Fax would never show this information on it so in my opinion they are worthless.
My oldest son bought a 2002 Jeep Grand Cherokee to use as a work vehicle, did not want to scratch up his two CTD trucks, last year. Dealer provided a CAR FAX saying the car had been serviced at every time period that the manufacture required and everything was great on this vehicle. Will two months later he was replacing the transfer case on the Jeep and he claims the transfer case was never every service, the unit was low on fluid and the fluid that was there was burnt. So what good is a CAR FAX then?
Jim W.

 

[Bob4x4]

Jim. I am not a big carfax fan either but sometimes it works.
The jeep transfer case output seal can go away and sling the fluid going down the freeway in one trip and never show on the driveway. Luckily I caught it on my wife's Jeep before any damage was done

 

[Bob4x4]

For the owner of ONE truck it is unrealistic to make an accurate statement about a full run of vehicles. Reading forums is also not the most accurate. People that are happy tell a couple of people,those that are unhappy tell everybody who will listen.
Even in my situation of working on them day in and day out is not 100%. I see many broken ones but the ones that do not break the % is much lower.

 

[RVTRKN]

I have an early 08 built and sold in 07, so I have most of the 07. 5 features on the truck such as axles and steering gear. I have been too the dealer six times since I bought the truck five times for oil changes most where free and one time for a recall to provide a flash to the engine ECM. Since then the truck has been trouble free and never ever been back to the dealer. I do all my own maintenance and a CAR Fax would never show this information on it so in my opinion they are worthless.

My oldest son bought a 2002 Jeep Grand Cherokee to use as a work vehicle, did not want to scratch up his two CTD trucks, last year. Dealer provided a CAR FAX saying the car had been serviced at every time period that the manufacture required and everything was great on this vehicle. Will two months later he was replacing the transfer case on the Jeep and he claims the transfer case was never every service, the unit was low on fluid and the fluid that was there was burnt. So what good is a CAR FAX then?

Jim W.

Jim, I know the Carfax is not perfect, but if the vehicle is a buyback or has had several trips to the dealer for major warranty it should show up.



But it is well known that the early 6. 7's had issues with the Turbo's and the DPF's and for that reason, I would not consider buying one. But Carfax is a minor cost and the dealer selling the truck should pay for it, but if its a private deal the cost is minimal. In 06 when I ordered my C&C the reg pickup had not hit the market yet, so little was known about them, and I was lucky that the C&C version of the 6. 7 is a winner.

 

[HBarlow]

Can you cite any sources for all the claims you continue making about all the trucks with all these imaginary problems you are reporting? Since you started throwing mud at your screen you have made exaggerated or false claims about all the trucks that were repurchased by Chysler under lemon laws and more exaggerated claims regarding entire model years of trucks that you claim are unreliable but have provided no actual proof of your claims.

Please provide evidence of all the problems you are reporting.

A handful of complaints here tells us nothing. You have no idea what the duty cycle has been on the trucks where owners have complained but most of all you have no idea what tiny percentage of trucks sold in each model years have actually experienced problems either in warranty or out when compared to overall numbers sold and in service.

Some of the trucks with complaints have been run on dirty fuel or fuel contaminated with gasoline either by distribution errors made in the fuel pipeline or by accidental misfueling by owners who are not likely to admit it.

A few early trucks had problems. So what? A few that continue to be used by their owners for home to work or home to grocery store short trips may have problems. Again, so what?

The blame should mostly be placed on the Economy Punishment Agency for forcing the emissions crap on the manufacturers.

Most of these trucks work great when used as trucks as intended.

Volkswagens with the TDI engine which uses a very similar Bosch HPCR fuel system have has some injection pump failures. VW claims it is caused by diesel fuel contamination either by the US distribution system or by owners. VW claims the same cars with the same Bosch HPCR systems are completely reliable in Europe.

 

[HBarlow]

Well, I guess we could say that if i didn't puncture your hot air balloon once in awhile you'd spout a lot more slanderous nonsense about Cummins ISB6. 7 engines in late Gen III and early Gen IV trucks. You should thank me for defending the reputations of our trucks against the wagon loads of crap you're spreading.

Exaggerating the numbers of problems actually experienced by the overall population of trucks discourages some from buying them and devalues the market value of lots of good used trucks that their owners might wish to sell. if you have facts to back up your criticism we'd all appreciate reading them.

Satisfied owners don't show up here everyday saying my truck works great. Those that occasionally complain here sometimes do have legitimate troubles with their trucks but if all we read are the negatives it creates a false impression that all the trucks are faulty. That is simply not true. We have no way of knowing if something the owner did or failed to do caused his problem.

 

[RVTRKN]

You should thank me for defending the reputations of our trucks

We have no way of knowing if something the owner did or failed to do caused his problem.

B-Block, Dowel pin, lift pump, injector pump and the various others I have forgot about on earlier CTD. Earlier 6. 7 HAVE HAD ISSUES, you can bury your head in the sand if you want to. Why don't you warranty all used 07. 5 trucks that are purchased from this day on, if your so convinced they are a good investment. And now your claiming that it was owner related failures. Your words!

 

[HBarlow]

RVPoser,

If your reading comprehension was a little better you might understand my comments.

When someone says, "we have no way of knowing if something the owner did or failed to do caused his problem" the statement means we cannot rule that out as a possibility. It is not a flat statement meaning "the problem was caused by the owner. " Words have meaning.

Cummins has built about two million engines for installation in the Dodge platform. What percentage of them have had any of the mechanical failures you claim is epidemic?

I drove an '01 325k miles. I experienced one fuel transfer pump failure. It occurred when the truck was young and in warranty. It stumbled on mild acceleration a mile or two from the Lubbock dealer so I drove it in and told them what was wrong and the pump was replaced. I never had another failure. I've never had an injector pump failure. Have never had an injector failure. I've never seen any need for a fuel pressure gauge and have never used fuel additives except anti-gel in very cold weather.

Do you believe everything you read?

 

[RVTRKN]

OK, your right, I'm wrong.



Now move on.

 

[EB]

To get back to the original post of "opinions of the 6. 7", I think it is a great engine. My truck has a build date of 10-06 and like Harvey reported has a lot of miles (nearly 454,000) probably 90% pulling a 40 ft gooseneck trailer. It is sitting in front of my house right now with 12,400 lbs of drill pipe on it. Truck, trailer and load combined weighing around 29,000 lbs. That is a typical load for me, sometimes heavier, sometimes lighter. To be fair, my truck is completely deleted, has been since around 150k. That's when the DPF cracked and I was told that was the average life expectancy of them and they cost at that time around $2300. I had already had a EGR cooler failure and decided then to lose the only problems I was having. I have had no engine issues with the truck since. The 6. 7 engine is very strong and very reliable. If the emissions issues are fixed I wouldn't think twice about getting another one or telling anyone that would listen, that was the truck to buy. Used, if everything is up to date on the emission fixes, even up to 100k, I wouldn't think twice about it if the price were right.

 

[RVTRKN]

EB, it was your threads and posts that sold me on the 6. 7 back in 2006, if I had to wait a year or more to purchase my C&C, I probably would of went with the Aisin auto. But I might have purchased a used 3500 5. 9 with the NV5600, in 07 they would have been low miles then. I would of hesitated when the 6. 7 regular trucks started having cel's and turbo issues. But the choice I made seems to be a good choice so far, I agree, the 6. 7 is a very strong engine, even in the reg pickup, its the stringent emissions that have burdened the reg pickup 6. 7 engine.

 

[LNaugle]

My 2 cents... I work on more 5. 9s than 6. 7s, especially not the ones that have been deleted... . hardly ever see em except the usual, lofs,bjs,steering upgrades, etc... Have only HAD to do injectors in 2 of em...

 

[NIsaacs]

My 2 cents... I work on more 5. 9s than 6. 7s,

Some of that is probably because there are more 5. 9's on the road, all out of warranty. The 6. 7's are only 6 years old with most still under warranty so they mostly go to dealers for repairs. I think this also fits with Bob4x4's repairing one Cab Chassis to 50 pickups. That might be close to the ratio of C&C v/s pickups... 50 to 1...



Nick