How do you replace the water pump on a 1991 Buick Regal?

Answer 1

The best way to find out is go to your local auto parts store, ask for a haynes or chiltons manual on your vehicle. This will tell you everything you need to know about working on your vehicle. It is probably one of the easiest jobs on a 3.1L engine. On the 3.8 first take off the overflow bottle for the radiator. There is one bolt in the left support, take the cap off, pull the bracket off the bottle and pull bottle straight up and put in between the motor and radiator. You don't have to take off the radiator hoses to replace the pump. Then you want to take off the serpanteen belt. Once you have that off take off the 4 bolts on the pump pulley. I held on the pully and used a wratchet to break them loose. Then there are 4 big bolts and 4 small bolts. 3 of the small bolts are on the top and there is on on there bottom. Once all the bolts are taken off use a rubber mallet to tap the pump and it should pop off. Scrape all the left over gasket off the surface and clean all the debris out off the coolant passages. Spread gasket sealer on the gasket on both sides and put the gasket on the pump area lining up the guide pins and coolant areas with the holes on the gasket. Then place the pump back on using the pins on the block as a guide. Reinstall bolts tightening them in a criss cross patteren. If you know what torque the bolts are suppose to be set to and have a torque wrench tighten to spec. I didn't have on so i tightened the bolts till they were tight and about a 1/4 of a turn more. Once tightened down put the pulley back on and then your belt and overflow bottle. Fill your radiator with fluid and press out the air bubbles by squeezing the upper radiator hose. Put the cap back on and start car for about 1 min or 2 and turn off car wait till radiator coolant is cold. Take off radiator cap and fill radiator again if needed and again take out air bubbles. Do this until radiator stays full. When full add some cooalnt into you overflow botlle if needed. Check all hoses and thermostat also.