Whelp, I waited too long to get around to this, and the pump finally gave out on my son yesterday. We’re hoping to tackle this Friday, along with the serp belt and pulleys/tensioner.
Going to use R-Pow3R3d’s awesome sticky for the belt and pulleys. Volvo XC90 & S80 V8 - How-To: Serpentine Belt, Tensioner & Idler Pulleys Replacement
Plan is to follow VIDA for the rest of the ps pump replacement steps, but I welcome any tips/tricks from those who have already been down the path!