Unless it actually fails - the best time to do it would be at the same time you have the timing belt replaced. To get at it you have to go through much the same procedures and it is just plain cost-effective to have it done at the same time even though it seems to be okay. Odds are it will fail BEFORE the next time the timing belt needs replacement and you'll wind up paying double labor charges.
How do you change a water pump on a 2002 Nissan Sentra?
how do you remove the water pump in a 2002 ford escort
over a grand
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Remove and replace it.
see "how too replace water pump on 2002 Trailblazer"
Yes, Always change water pump at same time, save ya lots of work later,
its impossibe!
You will need to drain the water from your 2002 Montero cooling system. Remove the water pump belt. Remove the water pump return hose. Remove the water pump retaining bolts. Reverse the process to install the new water pump.
Inside the crankcase (oil sump)
The water pump on a 2002 Hyundai Accent is replaced by removing the engine accessories, disconnecting the radiator hoses, and unbolting the pump. A new gasket and pump can then be attached.
YOU DON'T!!! I have a 2003 avalanche and I had to replace the water pump you can't replace the seals!!! It's a defect in the 2001 to 2003 avalanche the seals fail.