What's with all the articles when talking about the LMM being an "interim" model engine? I know the emissions change in 2010, but how soon would we find out if the 6.6 Duramax is changing with the next 2 years or so? I know the only real change from the LBZ is the emission stuff, but I don't won't to own an engine that's only going to be configured like this for a couple years and then completely change. Is there any cause for concern because of this? I know most of this is speculative, but something is going to change for the 2010 GM diesel. I'm almost convinced to just get an LBZ and wait for 3 or 4 more years before getting into the emission equipped diesels. Any thoughts? Chris

That was my driving factor, that and I'm not crazy about the looks of the new trucks, Chevy or GMC. :cool:

There was an article in Diesel Power about this. They didn't have a ton of information but just a blurb. From the sounds of it, the LMM is just an interim engine. Personally I would go with the LBZ because it doesn't have all the emission crap on it.

ya in 2010 Gm is gonna make a different diesel engine..not sure if its gonna be a duramax?:(

ya in 2010 Gm is gonna make a different diesel engine..not sure if its gonna be a duramax?:(

Get the LMM while you can

ya in 2010 Gm is gonna make a different diesel engine..not sure if its gonna be a duramax?:(

New motor is supposed to be a Duramax 6.6L with a SOHC actuating 4 Valves per cylinder.

Piezo injectors might make their debut in this motor.

Not to rain on anyone's parade, but we also thought the LLY motor was in interim motor.
Look where things have gone since then.
Who knows what tommorow will bring, right?

They are all interim motors IMHO. Technology gets better and of course the EPA sets up more regulations and restrictions as time goes on.

They are all interim motors IMHO. Technology gets better and of course the EPA sets up more regulations and restrictions as time goes on.
Good point...Unless they've never changed them they are always interim motors

Last year a friend who is in the cng business said that he was told the Duramax was going to be 7.1L in a few years.

New motor is supposed to be a Duramax 6.6L with a SOHC actuating 4 Valves per cylinder.

Piezo injectors might make their debut in this motor.

I thought I had read on more than one occasion that they were using piezo injectors in the LMM.

I checked out the article in Diesel Power again and according to them, that rumor has that it will be a 6.9L UMAX. Now what that means I have no idea.

Trucks are always changing, its just the nature of the business. If you are waiting for the truck that finally has it all, you will never buy a truck.;)

I guess my main concern is the DPF. Will this become a basic part of a diesel engine like a catalytic convertor has become to a car? Or will the new diesel not have to rely on this DPF, but through piezo injectors and new design technology be able to achieve the new 2010 standards. I'm really going back and forth between the LBZ GMC and the LMM GMC. Chris

There are new stricter government regulations for 2010. If you don't like the DPFs now, you are really going not like 2010. I believe they need Urea injection in the exhaust plus the DPF to meet emissions. There probably be a new RPO in 2010 for all the new components to meet the emissions.

There are new stricter government regulations for 2010. If you don't like the DPFs now, you are really going not like 2010. I believe they need Urea injection in the exhaust plus the DPF to meet emissions. There probably be a new RPO in 2010 for all the new components to meet the emissions.


Easy to refill though. Nobody gets to pull over and pee in the bushes. Just pass the catheter around!:eek:

ive heard something about a 454 d-max that would be cool. but who knows

ive heard something about a 454 d-max that would be cool. but who knows


I hope that is not true. People seem to have a fascination with that number, for whatever reason I dunno. Keep the diesel a diesel, and if the CID happened to work out the same, fine, but hopefully just a coincidence.

I'm sure they only thing they would share is the displacement.. Nothing else would be similar. 7.4 liters would be nice :) Imagine how much power you can make with that motor, twin pump'd and a GT60 :D

I'm sure they only thing they would share is the displacement.. Nothing else would be similar. 7.4 liters would be nice :) Imagine how much power you can make with that motor, twin pump'd and a GT60 :D


I am sure they want to continue being the king. I would love to be a fly on the wall in the R&D department.

you can't get all that fuel and air threw a dpf though -:t

ive heard something about a 454 d-max that would be cool. but who knows


Yeah I heard 7.4l too. I have no Idea if its true though.

I wonder if the Urea injection will happen? I also wonder if they will program it to limp when thet tank runs empty? It will be interesting.

I think is was in a diesel power mag? They said that GM has been testing 7.4l duramax engines:confuzeld

I would be surprized if they do 7.4L for the pickups. Most likely the 7.4 will be for the Medium Duty trucks.

blah blah blah...a million things could change between now and 2010. None of the magazines or media know jack IMHO...for all we know they could be putting an 8.3l cummins in...until the 2010's actually hit the lots, no one knows anything. :)

ben

blah blah blah...a million things could change between now and 2010. None of the magazines or media know jack IMHO...for all we know they could be putting an 8.3l cummins in...until the 2010's actually hit the lots, no one knows anything. :)

ben

I agree. I don't put faith in the printed media, DP is getting pretty close to a tabloid now. It would be even better if the put a SISU in, rather than a Cummapart. :p:

I am sure they want to continue being the king. I would love to be a fly on the wall in the R&D department.

"Man, I can't come up with any new ideas for the Dmax! You think of anything Fred?"
"Nope, nothin here.....what about you Zeke?"
"Nope, nothing..."

"Wait a sec, I wonder what those guys on Diesel Place came up with this week?!?"



later......


"DUH.why didnt WE think of that!"

"Man, I can't come up with any new ideas for the Dmax! You think of anything Fred?"
"Nope, nothin here.....what about you Zeke?"
"Nope, nothing..."

"Wait a sec, I wonder what those guys on Diesel Place came up with this week?!?"



later......


"DUH.why didnt WE think of that!"

:hail:

I wonder if the Urea injection will happen? I also wonder if they will program it to limp when thet tank runs empty? It will be interesting.
From what I've read, that's the only way that the EPA will accept SCR (selective catalytic reduction) as a diesel emission control. The engine has to go into a reduced power mode eventually if the urea tank isn't refilled. I believe most manufacturers will make the urea tank large enough that refilling it will coincide with a normal oil change interval.

From what I've read, that's the only way that the EPA will accept SCR (selective catalytic reduction) as a diesel emission control. The engine has to go into a reduced power mode eventually if the urea tank isn't refilled. I believe most manufacturers will make the urea tank large enough that refilling it will coincide with a normal oil change interval.

Thanks. I wonder what the feed rate of the Urea will be, and where will the tank be located?

Dodge says the 6.7 is meeing 2010 emissions now, without urea. So there's hope Chevy won't need it either.... but the D-max needed EGR earlier that the Cummins.

2010 is already here in development terms though.... so they already know what they're doing and are working to bring it to reality.

Thanks. I wonder what the feed rate of the Urea will be, and where will the tank be located?

....and will it be a tank, or will it be a bladder... :)

Or until the tank sensor is defeated. Heck that might be easier that defeating the DPF!