I have an '05' ,about 12000 miles , recently upgraded a few things , but noticed a noise previous to it , and still there but maybe slightly different now, kind of a slight valve rattling or gurgling type sound. , when accelerating , no load , I had a 90 model ,but it was typically so loud you would never notice something like this, could be normal, anyone have anything similiar, hopefully is normal,
i would think that as long as there is no power loss or abnormal readings from the gauges or funky feelings from the motor it's ok... the cummins motor is pretty loud (even the new common rail ones) so it might just be a noise the motor makes. does it change with engine temp?