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To remove the water pump, first, make sure engine is cool and no pressure in the system,

remove the belt. Then hold the pump pulley tightly and remove the 4 10mm bolts that hold

on the pulley. Tap the pulley to remove. Then remove the 5 5/16 (or 8mm) bolts that hold

the pump. Be sure a drain pan is under the car to catch the coolant. Clean the mounting

surface of old gaskets. Install new pump, pulley, belt, and bleed the system

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Q: How do you replace water pump on Chevy impala 2004?
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