Having just remedied a fuel leak coming from my HP fuel pump I am now contemplating the damage that is possible from the diesel that has leaked all over the engine. The 2 main concerns are the serpentine belt and the alternator. I dont think that the leak had been happening for that long but there has been diesel on the belt and the alternator is really gunked up but still working fine. Should i be concerned with this? Are there actions i should take? Pull the alternator and clean it? The belt looks fine at the moment. what effect with the diesel have on it? Anyway thanks for your input.