How do you replace the water pump on a 1991 Pontiac Sunbird 4 cylinder?

Hey Le==Some of these cars have to have the engine supports removed to get to the water pump. I suggest getting a manual on your car from a parts store. It will have pictures and everything. GoodluckJoe

i recently did this repair for a friend. It was excruciating. it was all day.

There are two pulleys running in this engine, and the water pump runs on the second pully behind a case. so you have to take almost everything off to get at it. Then, the water pump is actually the belt tensioner for that pulley system. it is excentric (sp?) so when you turn it in place, it tightens the belt. then you secure it back with three bolts. The belt system in question connects the drive shaft with the cam shaft, So you do have to be Very Careful with the belt/ pulley alignment.i marked the pulleys very very carefully so i could get everything lined up again.

This was a challenging repair. The one thing i did was had my GM Dealer parts person print the screen showing the breakdown of all the parts in that location so i had a reference point. Good luck