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Go Back   Hummer Forums by Elcova > General Hummer Talk > In the News

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Old 06-19-2006, 04:09 PM
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Default GM revamping Duramax diesel for new standards

GM revamping Duramax diesel for new standards

Posted Jun 19th 2006 8:01AM by John Neff
Filed under: Trucks/Pickups, Green, Chevrolet, GM, GMC


General Motors has decided to go ahead with plans to rework its 6.6L Duramax diesel V8 engine in anticipation of the new Tier 2 Bin 5 emissions standards that will take effect on January 1st. The new standards call for a 90-percent reduction of oxides of nitrogen and particulate matter. Though the changes won't interrupt production of the Chevy Silverado and GMC Sierra heavy-duty pickups in which the engines are used, they will sharply increase the cost of building the engines. GM Powertrain expects to meet the standards by using a new variable geometry turbo, enhancing the engine's exhaust gas recirculation and using a closed crankcase ventilation system. The exhaust system will also be supplemented with an oxidizing catalytic converter and particulate filter like those first introduced on many European diesels a couple of years ago.

You may remember Ford's plans to meet the new standards, which include using expensive piezo injectors on its new 6.4L twin-turbo Powerstroke diesel. Dodge has not revealed yet how it plans to get the Ram's Cummins diesel up to snuff by January 1st.
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Old 07-04-2006, 07:42 AM
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Default Re: GM revamping Duramax diesel for new standards

It'll be interesting to see how the automakers pull this one together....
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Old 10-13-2006, 01:14 AM
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Default Re: GM revamping Duramax diesel for new standards

Hope GM gets it right
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