Sorry to say it but EGR = guts ache. The US went to the wrong emission technology. You wont like me saying that, but its true. When US04 came in you should have jumped straight into SCR like Europe (Euro4). Here in Australia we have been running US04 & Euro4 since 2008, so we have had experience with both EGR and pure SCR (no EGR) for nearly 3 years. Have seen both technologies at work next to each other. EGR has a far higher guts ache factor - VGT / Coolers / Valves / Fan hubs - all the stuff you guys know about - trucks with 5 VGT turbos in 2 years, 3 coolers etc. SCR is inconvenient, but the engines are pre US04, so they last and are a lot more reliable. Either buy / use urea or you buy / use egr spare parts / downtime. In January 2011 we go to US07 / Euro 5 and Mack will offer a MP8 rated at 535hp with pure SCR (no EGR) & drop EGR all together. This motor will be million km + unit, like the D13 520hp SCR is today. A Mack MP8 EGR / Volvo D13A 500hp EGR is only half as reliable as the SCR version - true story. As far as Cummins goes, they are going to EGR / DPF next year here (US07) same as Detroit. Their engines are pretty unreliable now - so things cant get any better for them. We Aussies havent a time table for going to US10 yet - hopefully they will defer it as long as possible - anything to avoid EGR in 500 hp+ / 145,000lb +( 65 tonnes application) in our heat!
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Sorry to say it but EGR = guts ache. The US went to the wrong emission technology. You wont like me saying that, but its true. When US04 came in you should have jumped straight into SCR like Europe (Euro4). Here in Australia we have been running US04 & Euro4 since 2008, so we have had experience with both EGR and pure SCR (no EGR) for nearly 3 years. Have seen both technologies at work next to each other. EGR has a far higher guts ache factor - VGT / Coolers / Valves / Fan hubs - all the stuff you guys know about - trucks with 5 VGT turbos in 2 years, 3 coolers etc. SCR is inconvenient, but the engines are pre US04, so they last and are a lot more reliable. Either buy / use urea or you buy / use egr spare parts / downtime. In January 2011 we go to US07 / Euro 5 and Mack will offer a MP8 rated at 535hp with pure SCR (no EGR) & drop EGR all together. This motor will be million km + unit, like the D13 520hp SCR is today. A Mack MP8 EGR / Volvo D13A 500hp EGR is only half as reliable as the SCR version - true story. As far as Cummins goes, they are going to EGR / DPF next year here (US07) same as Detroit. Their engines are pretty unreliable now - so things cant get any better for them. We Aussies havent a time table for going to US10 yet - hopefully they will defer it as long as possible - anything to avoid EGR in 500 hp+ / 145,000lb +( 65 tonnes application) in our heat!