How to Replace Engine Water Pump 02-08 Nissan Altima
Difficulty: Advanced · About 90 min · Nissan Altima
Replace the engine water pump on a Nissan Altima after draining coolant, moving the alternator, and refilling with the specified coolant using the proper bleed procedure.
Tools you will need
- Drain Pan
- 10mm Socket
- 12mm Socket
- 14mm Wrench
- Razor Blade / Gasket Scraper
- Funnel
Parts and supplies
- Water pump
- Water pump gasket
- Vehicle-specified coolant
Steps
Drain the cooling system
Let the engine cool completely. Place a drain pan below the radiator, remove the cap only when cool, open the drain, and collect the coolant for proper disposal.
Disconnect the battery and move the alternator
Disconnect the negative battery cable. Release the belt tension, remove the alternator wiring and mounting fasteners, and move the unit aside without straining its wiring.
Remove the old water pump
Remove the pump fasteners and work the pump loose carefully. Clean the engine mating surface without gouging it, and keep debris out of the cooling passages.
Install the replacement pump
Fit the new gasket in the correct orientation and position the pump. Start all bolts by hand, tighten them evenly to the vehicle specification, and check that the pulley turns freely.
Reinstall the alternator and belt
Reinstall the alternator and connect its wiring. Route the serpentine belt according to the underhood diagram, release the tensioner slowly, and verify the belt is seated on every pulley.
Refill and check the cooling system
Reconnect the battery and fill with the specified coolant using the vehicle's bleed procedure. Run the engine while monitoring temperature and leaks, let it cool fully, then recheck the level.
Check your vehicle’s repair manual for exact specifications and fit.