Why can't I just take out the valves from the old pump and put them on the new pump? The valve looks so simple... I would just leave the spring and everything else alone, just unscrew the valves and screw the new ones in. Sounds simple enough One of the guys at my work told me that it might ruin the pump because it's not pumping as much fuel it is designed to, but I'm assuming the pump will fail over time and not immediately. Right now I am willing to do this process and buy another pump later on and just get this fixed right now; my girlfriend keeps bugging me to just sell the car but I don't want to It's a diesel mercedes kiss haha