How do you replace the water pump on a 1988 Pontiac Grand Prix?
first you wanna drain cooling system of course, you need to remove the four bolts off the water pump pully, it’s better to loosen them up when the belt is still on.Then remove serp. belt by using a regular 3\8 rachet on the tensioner. Remove the water pump pully.Then whith a paint stick mark where the position of the pump is because you can move the pump to any position but it will only blot up one way.Remove the five water pump bolts,(they are 8mm bolts) then remove water pump.