I need to relace the water pump on my 1997 cadillac seville sts
4.9 disconnect negative battery cable,drain the coolant from radiatorremove coolant reservoir, loosen waterpump pulley bolts,a screwdriver can help keep the pulley from turning,remove drive belt,remove idle pulley,remove waterpump mounting bolts(they are different sizes,some are star shaped) do not pry on waterpump until all bolts are removed,clean gasket surface,use gagket sealant and install new water pump(start all bolts before you torque any down.)
First, you will have to buy the special water pump removal tool available at most auto part stores for about $35. Next, drain the cooling system from the radiator and remove the upper & lower radiator hoses. At the lower radiator hose connection, there is a housing with 5 bolts. (before you go that far, remove the drive belt off of the water pump pulley by inserting a 1/4" ratchet into the tensioner to remove the belt)
Remove those 5 bolts and separate the housing. You now have access the the water pump. With the special tool & a 1/2" ratchet or breaker bar, turn clockwise to remove the water pump. The remainder of the steps is the reverse of removal. Make sure you use a new o-ring on the new water pump and put RTV sealant on the housing to prevent leaks. While you're at it, it's not a bad idea to replace your thermostat and hoses to make it a complete, thororugh job.
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