Photo 2/5 | 001 Diesel Tech Questions Ram 6 7 Waterpump | Stock water pumps on some 6.7L Cummins engines experience water-bearing failure or their plastic impellers breaking away from the shafts at less than 70,000 miles. A good fix is replacing the pump with Cardone Industries’ version (PN 5531412), which uses roller bearings and a cast seven-blade impeller. The same water pump can be used on 5.9L powerplants as well.
Photo 3/5 | 002 Diesel Tech Questions Sandblasting Bumper Bws 6967 | Cleaning old parts during a restoration or rebuild can be done in just about any enclosure. Proper ventilation and protective clothing are the key factors for protecting the person doing the media-blasting from inhaling the dust.
Photo 4/5 | 003 Diesel Tech Questions Mpg Filling Diesel Pickup | Fuel economy numbers typically don’t match up between what is indicated on the driver information center and what we figure doing our own hand mpg calculations. That’s because the indicated mpg is derived from a computer algorithm and not by measuring actual fuel used against miles driven.
Photo 5/5 | 004 Diesel Tech Questions Icy Def Def Filling Ram 3500 | DEF gets slushy when ambient temperature drops below 12 degress F (-11 deg C). When that happens, it’s tough for the little heater in the DEF tank, and those that might be heating the feed line, to get the fluid warm enough to circulate properly. When the metering system senses a flow issue, codes such as “P20B7” (“Reductant metering unit heater-control circuit low”) tend to pop up, alerting the driver there’s a problem within the SCR/Reductant heater circuit. Such a code may or may not indicate there’s an actual DEF heater or heater circuit failure.