[APKhaos]

I was impressed with your first para, because it indicated that AASCO had learned a lot about Pcar specifics since they did my stuff back in 2002. Back then I had to specifically mark and mask the areas I did not want them to coat. Sounds like they have [the front desk knew the right stuff], but the word has not made it to the workers yet! They should make it right.

The net is that the coating can be removed from where it should not be, particularly in the seating area for the alternator. Believe me, the alternator will not fit if there is any residual coating in that area.

Its perfectly OK to have the entire blade surfaces coated. In fact, that's the best way to do it. The aerodynamic efficiency of the fan is improved if anything by the reduced drag of the smoother surface. One thing to watch out for is the clearance between the outer edges of the fan and the shroud. If both are coated, the cumulative reduction in clearance can cause problems. Best bet it to carefully file off around 0.5mm from the outer edge of each blade before coating. This ensures that the clearance is OK after coating.