: Anyone else having trouble with the 6.7L Cummins?


cocco_78
10-13-2008, 08:53 PM
We have an 08 2500 crew cab long bed 4x4 with the 6.7L in it at work. We got it last november and it now has about 70,000 miles on it. The first 30k miles or so the truck was great. I loved that 6.7, it pulls pretty hard, but terrible mileage. I think the best I've gotten out of it was 16, and thats with rounding up! I don't drive it anymore, it got handed off to one of our installers who put the bulk of the mileage on it. So I can't say how it being used. I know he let it run all day long in the winter when he was at job sites, and I've seen it sit in the parking lot at work idling for a long time... I've told him not to let it idle, just for the fact its wasting fuel and probably not good for the motor...

Sometime before it hit 50k the turbo went on it. The dealer supposidly cleaned it or something and all was well for about a month before it went out again. After that the dealer replaced it... From that point on it seems like every other week its in the shop for something related to emissions. And whenever something is wrong with the truck the damn thing barely runs. Now at 70k it just went in and got a new injector. The dealer said it would have cost $1800 for them to replace 1 injector i it wasn't under warrenty...

Other than that, its a great truck! I think I'd love to get my hands on 03 or 04 crew cab short bed with a 6-speed and a 5.9!!!! I used to personally own a 97 club cab long bed with the old 12v and an auto, got rid of that at about 160k and that was the best truck i've ever owned!

Dookey
10-13-2008, 08:57 PM
yes. Plenty of people have problems with the 6.7.

cocco_78
10-13-2008, 09:21 PM
From the looks of it everyone is having the exact same problems. Man and it sounds like such a simple fix to get them running right! The guys at work are die hard chevy guys and they all love how big of a piece of shit they think this dodge is. Oh well, we have no choice in the vehicals that get leased for us, our parent company is German and they only lease Dodges for everyone from sales people to installers... The shity part is we can't even touch the damn truck or pick out what kinda tires we want on it. They put on shitty street tires on this thing and its constantly getting stuck out on jobs sites. Eh, my work sucks.

Dookey
10-13-2008, 09:23 PM
Shoulda got the 5.9. :D

ibrocun
10-13-2008, 10:28 PM
Find out what oil it's been getting.

The trucks with the DPF's require the new CJ-4 oils. The old CI4+ spec has too much ash in it for the DPF to handle.

welndmn
10-14-2008, 08:21 AM
Pretty much all 3rd Gen's would have problems idling all day long. The 6.7 are the worst.

Fool Injected
10-14-2008, 10:54 AM
DPF (basically switching to a free flow exhaust) and EGR deletes. Get the code free kit from Bay Area Diesel Performance (BADP). Those two deletes take care of the sooting problems and open the truck up. Most have no further problems after doing these.

cocco_78
10-14-2008, 02:16 PM
Find out what oil it's been getting.

The trucks with the DPF's require the new CJ-4 oils. The old CI4+ spec has too much ash in it for the DPF to handle.

Well i'm sure since its getting served at the dealer by a certified diesel tech is should be getting the right oil. :laughing:

ibrocun
10-14-2008, 05:32 PM
Well i'm sure since its getting served at the dealer by a certified diesel tech is should be getting the right oil. :laughing:

I would double check. I don't know about Dodge dealers, but I know of another dealer who will go unnamed who did not know.

BIGJMCCONNELL
10-14-2008, 05:49 PM
Pretty much all 3rd Gen's would have problems idling all day long. The 6.7 are the worst.

What is so bad about idling the 6.7? We have some older Detroits at work and we have problems with wet stacking since they idle so much.

AERONUTT
10-14-2008, 06:05 PM
What the guys in Germany don't know won't hurt them. :grinpimp: When it's time for tires, send 'em a bill for "Tires", not "Mud Terrain Tires". They don't need to know what kind of tires. Send 'em a bill for "Emission system repairs", not "DPF Delete & EGR blockoff". Shortly after that, you will be sending them much fewer bills overall and burning a lot less fuel. Sometimes, the end really does justify the means. :evil:

B-rock
10-14-2008, 07:22 PM
I havent had any issues with my '08. Most of the issues I know of were with the 07.5's But with the newer flashes those too have been mostly taken care of.

I did the DPF and EGR delete at 10K. The truck is a beast after doing those mods. Well it wasnt slow before the mods either.

The issues with poor milage is mostly due to the DPF needing to go into a regen cycle. With no DPF then there is no regen. The engine is much better off without all that.

cocco_78
10-14-2008, 08:58 PM
What the guys in Germany don't know won't hurt them. :grinpimp: When it's time for tires, send 'em a bill for "Tires", not "Mud Terrain Tires". They don't need to know what kind of tires. Send 'em a bill for "Emission system repairs", not "DPF Delete & EGR blockoff". Shortly after that, you will be sending them much fewer bills overall and burning a lot less fuel. Sometimes, the end really does justify the means. :evil:

LOL, yeah for sure. For some reason the company decided to lease this truck and we pretty much have no say in anything. We have to get it in for its scheduled service within 500 miles of when its due and they take care of everything. Stupid...

I just know that all the excesive idling is probably causing the problems to be worse than it should be. But for some reason they all think it doesn't hurt a diesel to idle. I've told them many times and they don't listen. They just don't want to jump into a cold truck after they have been on the job site for a few hours. The guy that drives the dodge now says it won't start in the cold if it sits for a few hours. BS... When my poserstroke has a working glow plug relay it would start down into the teens after sitting all night not plugged in. I'm trying to get them to write employees up for letting their trucks idle because of the waste of fuel. We put on alot of miles on our trucks, some average 100k a year.

Well work keeps track of truck repairs and who's trucks are who's... My last work truck was a 97 Chevy 1500, 350, auto, 4x4 that I drove to 270,ooo miles with only a radiator, belts, a water pump, and wore out 2 distributers. Oh and 4 transmissions. We finally retired the truck the last time the trans went out because they didn't want to put $1500 into a truck with that many miles... We sold it to a co-worker and he rebuilt the trans himself and the truck hit 300k. BTW, penzoil 10w30 every 5-7k miles since I used it, got it at 100k miles.

ddestruel
10-15-2008, 07:41 AM
What is so bad about idling the 6.7? We have some older Detroits at work and we have problems with wet stacking since they idle so much.

All 3 manufacturers new motors can not be idled for long if you do it will plug the particulate filters.

any vehicle after 2007 has MAJOR issues. we use Chevys and Fords and a couple of dodges. If i had thought for a momement that all of the 2007-2008 vehicles in a fleet would be having so many problems i would have sourced more 07's when i bought them all. Right now you couldn't give me another 6.4 or 6.0 Ford. the GM's have been OK but turbos have been a major issue as well as wiring for the allisons wish they would sell manual trannies, automatics never last. the dodges only had a few turbo DPF problems mainly on the trucks that do alot of stop and go driving.
overall most of them are clearing 100k miles before major issues arrise tranny/ clutch etc. The Ford's OMFG the price might have been right but the discount hasnt even come close to paying for the headaches and down time

85blue4runner
10-15-2008, 04:32 PM
put a 12 valve in it and all your problems will be solved.. :D

72blazer
10-17-2008, 10:34 PM
A buddies got an 07.5 with a superchips tuner, BADP DPF delete to 6" stack...The thing moves and sounds pretty decent, but he's taken into the dealer a couple of times within the first couple of months that he got it and he's had a leaking radiator since then as well (about 8-10 months)...I'm not too sure how happy the Dodge dealer will be to be touching the truck after losing the DPF :laughing: I'd rather have gone with the 5.9/six speed. Good thing I got the dirty max...

jbt
10-19-2008, 12:00 AM
LOL, yeah for sure. For some reason the company decided to lease this truck and we pretty much have no say in anything. We have to get it in for its scheduled service within 500 miles of when its due and they take care of everything. Stupid...

I just know that all the excesive idling is probably causing the problems to be worse than it should be. But for some reason they all think it doesn't hurt a diesel to idle. I've told them many times and they don't listen. They just don't want to jump into a cold truck after they have been on the job site for a few hours. The guy that drives the dodge now says it won't start in the cold if it sits for a few hours. BS... When my poserstroke has a working glow plug relay it would start down into the teens after sitting all night not plugged in. I'm trying to get them to write employees up for letting their trucks idle because of the waste of fuel. We put on alot of miles on our trucks, some average 100k a year.

Well work keeps track of truck repairs and who's trucks are who's... My last work truck was a 97 Chevy 1500, 350, auto, 4x4 that I drove to 270,ooo miles with only a radiator, belts, a water pump, and wore out 2 distributers. Oh and 4 transmissions. We finally retired the truck the last time the trans went out because they didn't want to put $1500 into a truck with that many miles... We sold it to a co-worker and he rebuilt the trans himself and the truck hit 300k. BTW, penzoil 10w30 every 5-7k miles since I used it, got it at 100k miles.

The service intervals also gets messed up by the excess idling. The service schedule should be tighten up which costs the the company more money.
I think the best thing to do is to install diesel heaters in the trucks. The company will safe lots of money in fuel and service.
http://www.webastoshowroom.com/blueheat/blueheat_heaterselection.html

BUDSTER
10-19-2008, 07:58 PM
It doesn't hurt to idle a diesel. It hurts to idle a diesel with a DPF. Between the DPF and ULSD, mileage is a thing of the past, especially in town.

As far as the turbos and transmission on the GM's, sounds to me like it's isolated. What kind of problems are they having, cause I haven't heard of hardly any on Diesel Place. As far as the Allison goes, I'll take it any day. Only problem there is if you go over 500 hp.