* Wrenches: A socket set (metric) with both 6-point and 12-point sockets in various sizes (likely including 10mm, 13mm, 15mm and potentially larger). Ratchets and extensions are crucial. Open-end wrenches might be needed for awkward angles.
* Screwdrivers: Both Phillips and flathead screwdrivers, in various sizes.
* Pliers: Needle-nose pliers might be helpful for small parts.
* Socket wrench(es) for crankshaft pulley bolt: This is often a very large bolt requiring a substantial amount of torque to loosen. You might need a breaker bar, impact wrench, or a suitable pulley holding tool to prevent the crankshaft from turning.
* Drain pan: To catch coolant.
* Coolant: The correct type and amount for your Eldorado's engine.
* Jack and jack stands: Essential for safe working conditions.
* Torque wrench: To properly tighten bolts to the manufacturer's specifications, preventing leaks and damage. This is critical for ensuring the water pump is properly seated.
* Possibly a serpentine belt tensioner tool: Depending on the configuration, you might need a specific tool to relieve tension on the serpentine belt to remove or replace it around the water pump.
In summary: No truly *specialized* tools, but a good, well-stocked mechanic's tool kit is essential. The difficulty lies in accessing the water pump and potentially the strength required to remove certain stubborn bolts. An impact wrench can be a significant time-saver. Before starting, consult a repair manual specific to your 1996 Cadillac Eldorado to get the exact torque specifications and procedure for your particular engine. This will list the specific tools required.
