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.
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.