Here are your instructions and some pics. Hope this helps.
Using a 15 mm socket or wrench on bolt attaching drive belt tensioner pulley, rotate drive belt tensioner clockwise on 3.0L (2V) and 3.0L (2V) FF, rotate the drive belt tensioner counter clockwise on 3.0L (4V) to remove drive belt from pulleys. Make sure spring keeper engages into slot.
1.Drain engine cooling system as outlined.
2.Release drive belt tensioner (6B209) and remove drive belt (8620)
3.Remove radiator and water heater hose from the water pump connections
4.Remove four bolts retaining water pump to engine and remove water pump
Place water pump onto engine and carefully install into position until seated.
Install four retaining bolts. Tighten to 20-30 Nm (15-22 lb-ft).
Install radiator and heater water hose to the water pump.
Position clamps securely.
Install drive belt.
Yes it is a tight fit To be honest I never use a socket or wrench I just pull the belt with my hand.
But do you have a breaker par to put the socket on instead of a socket wrench? The breaker bar head is not as big as the ratch and gives you a little more clearance.