In the EPA04 EGRengine, there are minor changes to the oil pump. The EGRengine has a higher oil output now. There are larger internal gears compared to the EPA98 non-EGR version which has smaller internal gears. See Figure 44187 .
Comparison on Oil Pump Internal Gears
The oil pick up tube in 3mm longer in length. The removal and installation procedures are the same for the non-EGRand EGRengine. See Figure 44189 .
Oil Pick Up Tube in the EPA04 EGREngine