wrenchman30
Veteran Member
being in the industry and working on the 07 compliant diesel engine and the dpf (diesel particulate filter) with the constant requirement to run the aftertreatment system. when the soot builds up the engine has a injector that sits behind the turbo and puts fuel into the exhaust to raise the temps to 1000 degrees. which in turn cooks the soot and turns it into ash. when the ash builds up you have to have the dpf cleaned. which you must be very careful about the ash we have been told turns to concrete like substance when mixed with water so any dust in you lungs will be hardened. just recently going thru the egr failure due to sooting at the shaft. which i will clean and hopefully be able to swap out when the new one soots. we are seeing egr failures on the cummins engines as low as 50000 miles. most are covered to 300000 miles. they are 750.00 plus labor and at times we cant keep them in stock we put on so many.