DMax Serpentine Belt
 

When I bought my truck 3 years ago, the PO had sprayed belt dressing all over the serpentine belt. Squeaked like hell. So, I changed the serpentine belt, but the residue on the pulleys made it start squeaking again. For another 10k miles this thing has squeaked. Despite multiple efforts to clean it with engine cleaner and brake cleaner, squeaking keeps coming back. I wonder now if the belt is impregnated with goo that just won’t come out of the grooves. I can swap the belt again, but I am worried a new one will squeak too due to pulley contamination.

Thoughts?

Re: DMax Serpentine Belt
 

I assume the tensioner and the idlers are in good nick.

Belt dressing is bad juju. You can probably get it off with chemicals and elbow grease.
Steel wool and WD-40, Goo Gone, or worst case Acetone or Toluene or Xylene.
Take care with the more enthusiastic chemicals like Acetone, Toluene, Xylene, and probably Goo Gone because they can melt nylon and other polymers that they make pulleys out of. Not to mention the grease seals on the idler pulleys, wiring jackets, sensor bodies, your intake manifold, and other such stuff so you need to be very careful to not splash it around.

Re: DMax Serpentine Belt
 

Squeaking definitely is not a bearing. Slightest whiff of WD40 on the belt and it stops squeaking.
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