how do you change a water pump on a 99 chevy malibu?

[Steve P]

my girl's car keeps over heating.coolant comes out of over flow i don't know where the water pump is located?i think it might be the thermostat and all the electric fans are working.how can i know please help.

 

[Charlie]

get yourself a repair manual. If it is the 2.4L, you are in for a nightmare if it is indeed the waterpump. It's down underneath the back of the motor. Most garages get about $600 for this job and hate it. If it is the 3.1, water pump is a snap cause it;s right on top in front. Might be a thermostat, Hope so, but he radiators have a habit of going bad on them. If you know of someone who has a thermal gun, it's easy to tell if the radiator is plugged.

 

[diesel boy]

overflowing can be caused by over filling. the thermostat might be closed.but i doubt its the water pump, and if your asking to replace one let me tell you that you probably cant. so look at the thermostat. check your coolant levels. and be sure that there is a proper mixture of antifreeze. and right amount of water if there is any of course... goodluck...max

 

[tronary]

NEVER replace any part 'till you KNOW the problem. The water pump or thermostat is not the problem. Your radiator is plugged and you need the services of a RADIATOR SHOP. If you know how you can remove it and take it in thus saving some bucks. You can NOT flush it or do anything yourself to correct the problem. If you drive it in the shop will check it for you and verify my diagnosis.