Im thinking with proper care and maintnance it can live as long as the cummins. What do you say about it?

 

Yeah...it'll live as long as a Cummins as long as it's on a trailer being pulled by a Cummins.... ....I kill me...

 

The bottom end of a Duramax is not designed to be nearly as strong as the Cummins. While there is less rotating mass, it turns at higher RPM. The connecting rods and crankshaft are not nearly as meaty, and there are fewer main bearings to support the crankshaft.

 

Well, if you service them exactly the same within there lift time. I would think the D-Max would have less life than a Cummins due to overall design and operating specs.
Lower RPM`s, In-line configuration, 30% less internal parts by design, No glow plugs, one head gasket. The K.I.S.S. method wins every time...

 

I don't think you'll see it happen..

 

It will happen if you keep it in the garage and don't use it at all. Lol.

 

It just wont happen. Its a V-8 diesel. V-8 Diesels were always short lived in tractors, and semi trucks. While the d-max seems to be a decent motor, it wont last like a cummins. You will see some major $ repairs coming into play if it makes 250k.

Eric

 

who knows.I seriously doubt it.They simply havnt been out long enough to see.There are so many high mileage cummins out there still running great.Of course there is the odd 6.5 and some old fords too.So who knows,maybe.Just look at the engine internals and take a guess.That should tell you right there.Also its my opinion that anything new is not designed to last.How are companies gonna keep selling trucks if no one has to buy one every 5 or 10 years?Look at the fords,every guy I know has to get rid of them every few years to keep from losing so much value.They tell me "youre dodge has like 300k on it ,its not gonna be worth anything when youre done with it".I say good,I never plan on getting rid of it anyways.

 

They have shown life when used over the road. You can put a lot of miles on them in a short period of time. You can do this with a lot of vehicles. Not as many heat and cool cycles really helps.

I don't think they are a durable in the 20-30,000 mile a year trucks.

 

I don't know anyone with a high mileage D-Max, but I know two guys who had high mileage 6.9 Fords. Both had well over 300,000 and ran fine. One smoked (blue) on start up.

 

My company truck is an '03 D-Max in a C4500. Lemme see here, Including the factory parts, its had 4 injection pumps, 3 sets of injectors, 2 water pumps (and is getting a 3rd one Monday due to leaking) 2 a/c compressors, 1 set of a/c lines, 1 power steering pump, 1 power steering gearbox, 1 transmission cooler, 1 fuel filter base, 1 transfer pump ( rear tank to front tank pump) 1 body control module, and numerous flash file updates. There have been other things such as several headlight switches, intake heater relays, rear pinion seals, brakes...etc... but that is on the GM side, not the Isuzu side. The truck has 92,000 miles on it. I've also seen 4 3/4 ton pickups at the local dealership that had broken crankshafts (these were personal trucks, not company trucks) The tech's at the local dealership were saying that this was a common problem for the 03 models...
We haven't broken any crankshafts, but we have washed down cylinders and have had to replace 2 engines.
Personally, I bought a cummins because every GM and Ford I've ridden in have rattling dashes and leaking door seals after they get some miles. Even my father in laws 1/2 ton GMC leaks air around the passenger door, new when bought and never wrecked. That, and the fact that I had an 89 Dodge that I HEAVILY abused and the dang truck just WON'T DIE!!!..

 

The EPA and Federal govt recognize the Duramax(and PSD for that matter) as light heavy duty engines,and the Cummins as medium heavy duty engines.The decision is based on the construction of the engine,its design,its size/displacement ,and how it is built.They then make the engine maker design its emission compontents for the 1/2 life of the engine,they say 125K light heavy duty,and 185K medium heavy duty.

So it is unlikely for a duramax to live as long as a cummins,stacking the odds in its favor,might skew the results,like neglecting the oil changes,and filters on the Dodge,and running synthetics and taking good care of the duramax,that is the only way i see it happeneing. Also with the bigger trucks like 4500/5500 GMs with duramax,they seem to go thru engines like crazy,it seems like the pickup is really about as much as the engine was designed for,where as the cummins,even in f750s holds up well.

 

There is something there when they put our Cummins in the big Fords. Heck Ford doesn't even put their PSD in the F650 and up but they option the 5.9 and now 6.7 Cummins. GM should forget the Dmax in anything bigger than a pickup.

How would you like this being responsible in your area? I can't think of a way to make it any uglier.

 

I have seen the washed cylinder effect a couple of flat bed tow trucks. Rebuilt those engines at 140,000 mi and 115,000. $9500 later back on the road 5,000 miles after that injectors and injector pump.Another $3000 this owner was upset to say the least. Bent conneting rods but no broken cranks.Head gaskets are common. But fuel injector pumps are a very common problem $1400 a pop. So get a new pump before warranty is out!

 

The Chevy guys say they will definitely outlast a Cummings and have more power too. No doubt they are right and the Duramax will break all records for durability, reliability, and power. Given the outstanding truck that it comes in and the Allison, why buy anything else. JMHO.