I had to replace the alternator on my Toyota Tacoma V6 4L and I noticed an ungodly amount of gunk collected on and around the old one. The truck is 2007 with just over 100K mi on it. The old alternator had literally 1/2" of greasy, muddy, black gunk over it but also on other pulleys around that area (tensioner, idlers, AC pump etc.).
Is this something normal for a truck this old or is it a sign of some problem? Should the front part of under the hood (so the radiator and the serpentine belt hang-ons) be taken apart every once in a while and cleaned to prevent this?