How do you replace the water pump on a 1991 Buick LeSabre?
First you will need to draw a digram of the belt patter if you car dosent have one on the front by the hood latch. Now you need an 18 mm socket. This is used to loosen the belt tensioner that is spring loaded, and is between the power stering pump and the alt. . Pull up on the belt tensioner and slip the belt off at the altanator or wherever it will come off the easiest. Then remove the alt. It only has 2 bolts. Then you need to remove the pully off the water pump (you will need it for the new one, so keep up with it) to be able remove all the bolts from the water pump. The pully has 4 small bolts. And the water pump has 3 large bolts, and i belive 4 or 5 small bolts. There are no hoses conected to the pump so that makes it a little easier. After you remove the old pump you will need to clean the block and remove all the old gaskest completly. Then with the new pump comes a gasket, make sure you put a thin layer of gasket glue on both sides of the gasket. then bolt it back on the the b
