Menu

1A Auto Video Library
Our how-to videos have helped repair over 100 million vehicles

How to Replace Engine Water Pump 02-08 Nissan Altima

Share on:
  1. step : Draining the Coolant (0:50)
    • Have a drain pan ready
    • Twist off the radiator fill cap
    • Twist off the radiator overflow bottle cap
    • Remove the radiator drain plug with a Phillips head screwdriver
    • Allow the coolant to drain
    • Reinstall the radiator drain plug
  2. step : Disconnecting the Battery (1:35)
    • Disconnect the Negative Battery Cable with a 10mm socket and ratchet
  3. step : Removing the Alternator (1:46)
    • Remove the four 5mm Allen bolts from the engine cover
    • Pull off the engine cover
    • Remove the two 10mm bolts from the alternator
    • Disconnect the alternator wiring harness
    • Remove the 12mm bolt from the alternator battery lead
    • Attach a 14mm wrench to the serpentine belt tensioner
    • Push down on the wrench to loosen the belt
    • Pull the belt off the alternator
    • Release the tensioner
    • Remove the upper 14mm bolt from the alternator
    • Remove the fuse box cover
    • Remove the 10mm bolt from the fuse box
    • Lift the fuse box out of the way
    • Remove the lower 14mm bolt from the alternator
    • Pry out the alternator with a pry bar
  4. step : Removing the Water Pump (4:07)
    • Have a drain pan ready
    • Remove the top two 12mm bolts from the water pump
    • Attach a 14mm wrench to the serpentine belt tensioner
    • Push down on the wrench to move the tensioner pulley
    • Remove the lower 12mm bolt from the water pump
    • Release the tensioner
    • Pry the water pump off with a pry bar
    • Clean the water pump mounting surface with a razor blade
  5. step : Installing the New Water Pump (5:20)
    • Put the new gasket into place
    • Put the water pump into place
    • Start the top two 12mm bolts by hand
    • Attach a 14mm wrench to the serpentine belt tensioner
    • Push down on the wrench to move the tensioner pulley
    • Insert the lower 12mm bolt into the water pump
    • Release the tensioner
    • Tighten the three 12mm bolts
  6. step : Reinstalling the Alternator (6:26)
    • Put the alternator into place
    • Thread the lower 14mm bolt into the alternator by hand
    • Thread the upper 14mm bolt into the alternator by hand
    • Tighten the two 14mm bolts
    • Insert the two 10mm bolts into the top of the alternator
    • Reconnect the alternator wiring harness
    • Reconnect the alternator battery lead
    • Fasten the 12mm nut for the battery lead
    • Insert the 10mm bolt into the fuse box
    • Push on the fuse box cover
    • Attach a 14mm wrench to the serpentine belt tensioner
    • Push down on the wrench to loosen the belt
    • Pull the belt onto the alternator
    • Release the tensioner
  7. step : Reconnecting the Battery (8:20)
    • Reconnect the negative battery cable
  8. step : Reattaching the Engine Cover (8:29)
    • Put the engine cover into place
    • Insert the four 5mm Allen bolts into the engine cover
  9. step : Refilling the Radiator Fluid (8:43)
    • Refill the radiator with coolant using a funnel
    • Twist on the radiator cap
    • Twist on the radiator overflow bottle cap

Brought to you by 1AAuto.com, your source for quality replacement parts and the best service on the Internet.

Hi, I'm Don from 1A Auto. I hope this how-to video helps you out, and next time you need parts for your vehicle, think of 1AAuto.com. Thanks.

In this video, we're going to show you, how to replace the water pump on this 2003 Nissan Altima with a 2.5 liter, four-cylinder engine. It's the same part and process on these Altimas from 2002 to 2008 and on Sentras from 2002 to 2009. The items you'll need for this are a new water pump from 1AAuto.com, 10mm to 14mm sockets and ratchet with an extensions, 5mm Allen bit, 14mm wrench, pry bar, Phillips screwdriver, drip pan, and funnel with a screen.

Start off by removing the radiator fill cap as well as your overflow bottle cap. Now, under the vehicle, in this hole right here, you'll see this is your coolant drain. Using a Phillips screwdriver just twist that plug out and make sure you have a drain pan that's clean to collect all that coolant. Once coolant stops pouring out, replace the plug.

Using a 10mm socket and ratchet, you just want to disconnect your negative battery cable. Now, you want to just remove this engine cover and it's held on by four 5 mm Allen bolts. Just go ahead and remove those. On your alternator, you'll see there is one 10mm bolt right here and another 10mm bolt right here. You want just to go ahead and remove those. Now, disconnect your alternator harness, just press the tab and pull it free. Under this cap here, you'll see that there is a 12mm bolt, you want to just go ahead and remove that. Now use a 14mm wrench and just place it on to the tensioner right here. When you press down on this wrench, it's going to loosen the belt. Pull the belt off the alternator and try and keep it on the other pulleys, and then slowly release the tension on the wrench.

The alternator is secured by two 14mm bolts right here. We will fast forward as Don removes those. The lower bolt, you're going to realize, it's a very long 14mm bolt. We actually have to lift up the fuse box so that we have better access. You want to pull off that cap, and then you want to remove this 10mm bolt right here. He did actually need some penetrating oil for that. Then, you just want to lift it up just enough, so you can get that lower bolt out the rest of the way. We actually just push it down with the pry bar, and it pulls right out. Take the pry bar and pry your alternator out.

With the alternator out of the way, you can see water pump's right here, and it's held in by these three 12mm bolts. You want to just go ahead and remove those. When you get to this lower bolt, you realize it can't come out all the way because of the pulley. You just need to grab your 14mm wrench, and push down on the tensioner. Now, you can just twist that bolt right out. Then you want to just carefully release the tension. Using a pry bar, pry your water pump out, make sure you have a drip pan under it, because coolant will come out. Using a razor blade, we're just going to clean up the area where the water pump was.

On the right is the old part, on the left is the new part from 1AAuto with a new gasket. You can see it's identical and it will mount exactly the same. Make sure your gasket is in place and then just push the water pump into place. You want to just replace the easier-to-get-to bolts, and for now you can just put each of them by hand. For the lower bolt, again, just use that 14mm wrench on the tensioner and then just twist in the bolt by hand. Now, using your 12mm wrench, tighten up those three bolts the rest of the way.

Take your alternator and put it into place. You want to put it into place with that lower bolt. Again, just kind of do it from underneath the fuse box. You can leave that bolt a little bit loose. Now, replace the upper bolt and once you hand thread that in, then tighten both those bolts up. Now, you just want to replace these two 10mm bolts along the top here, and make sure that you have that wire in place as you do that. Be sure to put this bracket back in place properly. Reconnect your alternator harness and put the battery wire back on, and tighten up that nut. Now, you just want to replace that 10mm bolt that secures the fuse box in place, and replace the fuse box cover.

Take a 14mm wrench, get it down on the belt tensioner, push it down and pull the belt on. You can see here, we get it partway up. Then we reposition the wrench and get the belt all the way on. Reconnect the native battery cable. The engine cover back into place and replace those four 5mm Allen bolts. Now, using a funnel with a screen, pour you coolant back into the radiator and replace your radiator cap.

We hope this video helps you out. Brought to you by www.1AAuto.com, your source for quality replacement parts and the best service on the Internet. Please feel free to call us toll-free, 888-844-3393. We're the company that's here for you on the Internet and in person.

Tools needed for replacement:

    General Tools

  • Razor Blade / Gasket Scraper
  • Drain Pan
  • Funnel

  • Hex Wrenches

  • 5mm Hex Wrench

  • Ratchets & Related

  • Socket Extensions
  • Ratchet

  • Screwdrivers & Related

  • Pry Bar
  • Phillips Head Screwdriver

  • Sockets - Metric

  • 13mm Socket
  • 14mm Socket
  • 11mm Socket
  • 12mm Socket
  • 10mm Socket

  • Wrenches - Metric

  • 12mm Wrench
  • 14mm Wrench

2002 - 2008  Nissan  Altima
2005 - 2006  Nissan  X-Trail
2008 - 2010  Nissan  Rogue
2002 - 2009  Nissan  Sentra

Water Pump

Nissan Altima Rogue Sentra X-Trail Engine Water Pump DIY Solutions

This part replaces:

  • Hollander 324-58596
  • Hollander 324-50154
  • Hollander 324-58534
  • OE # 20108J000
  • OE # 21010F461B
  • DIY Solutions EWP00110
Search Videos
Go To Top


Same Day Shipping

Orders ship same day when ordered by 2pm ET. Need your part faster? Choose expedited shipping at checkout.


Guaranteed To Fit

Providing you the highest quality, direct fit replacement auto parts enforced to the strictest product standards.


USA Customer Support

Exceeding customers' expectations every day, our team of passionate auto enthusiasts are here to help.


Instructional Video Library

Thousands of how-to auto repair videos specific to year, make and model guide you step-by-step through your repair.

Loading...