Little info for the Gm drivers.

[c5racer]

SEMA eNews, Vol. 9, No. 36 - September 6, 2006

DETAILS ON GM’S NEW DIESEL

As discussed in Market Snapshot previously, automakers are working on developing cleaner, more efficient diesel engines that will meet the new U.S. emissions requirements taking effect next year. General Motors Corp.’s powertrain division recently unveiled its heavy-duty Duramax V8 turbodiesel.

The new 6.6L Duramax is the first GM engine to be sold in the United States equipped with a soot-reducing diesel particulate filter (DPF) as part of its exhaust system. The Duramax, along with all other 2007 diesel engines, is designed to run on ultra-low-sulfur diesel (ULSD) fuel that becomes available nationwide on October 15.

The upgrades to GM’s Duramax will allow the engine to meet new U.S. EPA-mandated Tier-2 emissions standards for medium-duty diesel engines manufactured after January 1. These new regulations call for a 90% reduction in particulate matter and a 50% cut in oxides. The addition of a DPF reduces particulate emissions by trapping soot in a “honeycomb-like ceramic filter after it passes through an oxidizing catalyst. Once the DPF is full, an automatic, high-temperature regeneration process periodically burns off the trapped particles to clean out the filter,” according to Ward's Auto. This requires extra amounts of fuel to be injected into the exhaust system to raise temperatures from 250°F to near 600°F. The regeneration process should allow the DPF to operate reliably for about 100,000 to 150,000 miles. “After that, it may be necessary to remove the filter and blow out the accumulated ash with compressed air.”

Other upgrades to the 6.6L Duramax include: new electronic controls; a more efficient variable geometry turbocharger; an enhanced exhaust gas re-circulation system with improved cooling and ventilation; strengthened block, cylinder heads and internal components; a higher fuel-injection pressure at 26,000 psi; a new fuel-delivery system with 7-hole injectors; new independently controlled glow plugs for faster startup; and a larger capacity cooling system.

The new Duramax will be available January 1 in the heavy-duty GMT800-based Chevrolet and GMC pickups.






04 Silver Dodge Laramie QC 3500 DRW, HO Diesel, 2wd, 6spd, LB, 4.10, Sport pkg, Bun warmers, Jake.

2004 Big Sky 3670RL, Fireplace, Sat Dish/Dig Readout, Cent Vac, Big Sky & Value Pkg, 2 Fantastic Fans, Basement Tray, Safety Glass, 2 Batts, Pressure Pro

[ronnilu]

Lester - thanks for the information. I've been wondering about where this new formulation diesel fuel was and why I havent seen any pumps for it. Are other makes going to be able to use this fuel or just the GM's? Do you know what happens if you put the new fuel in an older diesel?
mike

Mike & Ronni Sorrell
Bakersfield, Calif.
'06 3295RK
'03 GMC Duramx/Allison,4 door, long bed, supersprings,starboard running boards LineX

[richfaa]

Once the DPF is full, an automatic, high-temperature regeneration process periodically burns off the trapped particles to clean out the filter,” according to Ward's Auto. This requires extra amounts of fuel to be injected into the exhaust system to raise temperatures from 250°F to near 600°F. The regeneration process should allow the DPF to operate reliably for about 100,000 to 150,000 miles. “After that, it may be necessary to remove the filter and blow out the accumulated ash with compressed air.”


All of the new diesel motors use this process..It means lower fuel milage as that fuel does not run the motor.The clean air standards may be a good thing but it comes at a price to the consumer in may ways.As the date for these motors to hit the showrooms draws near more bad consumer news will follow..

Rich& Helen N.Ridgeville,Ohio.

F-350SD, Lariat, V-10,4:30 Diff, tow command Long bed, Crew Cab Dually, 06 3400RL
Mor-Ryde Pin Box

[BirdingRVer]

Ronnilu

Here in California stations are only allow to sell the new ultra-low fuel after September 1st of 2006 so you have no choice but to use the new fuel. This url discusses using the new fuel in older engines http://fleetowner.com/mag/fleet_ulsd_changeover_ready/

Grant
2007 Silverado Classic 3500, DRW, D/A, CC
Montana 3075, soon maybe.

[mobilrvn]

Sure that it will be a long time, if ever, before you'll be able to get ULSD in Mexico. If you want a new rig and drive it in Mexico, get a Classic 2007 before 1 Jan.

MoBillTuxRex&Princess
Fulltiming since '93
'04 3575; '06 2500HD Duramax/Allison

[ronnilu]

Grant - thanks for the link. It appears to only address a potential problem with fuel filters at this point, but I can just bet we will see other issues crop up that haven't yet been identified. I was hoping there would be something like an additive that would be recommended, but that still may come about. Will just have to wait and watch.
mike

Mike & Ronni Sorrell
Bakersfield, Calif.
'06 3295RK
'03 GMC Duramx/Allison,4 door, long bed, supersprings,starboard running boards LineX

[richfaa]

That is a good article and the 1% less energy number is the best I have heard or seen in the seminars we have been to.I hope that is true. , In any case the new motors will cost more, the new fuel will cost more, they will be less efficient and the under 07 trucks will suffer some ill effects..only time will tell what the real values and effects will be. I just get the feeling that a lot of what we are hearing is being suger coated so as not to scare the consumer away..

Rich& Helen N.Ridgeville,Ohio.

F-350SD, Lariat, V-10,4:30 Diff, tow command Long bed, Crew Cab Dually, 06 3400RL
Mor-Ryde Pin Box

[Cat320]

c5racer..."The new Duramax will be available January 1 in the heavy-duty GMT800-based Chevrolet and GMC pickups."

Word from several Chevy and GMC dealers is that the new 1500s will start production in Jan. 2500hd/3500 diesels will not start production until Mar/Apr. That means the average guy on the street will be lucky to have an 07 D/A by June 2007.

That's why I got a classic...plus I would not trust a new engine from any of the big three. Honda/Toyota maybe, but not from the others.

[Mac]

Cat,

I heard from my Chevrolet dealer yesterday that the anticipated price increase was going to be even more than they originally heard for the new diesels. I think he said $7100 list. OUCH!

mac

[Cat320]

Could be, when I was researching vehicles a few months ago they said around $2500, who knows.