How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask ssnyder Your Own Question
ssnyder, ASE Certified Technician
Category: Chevy
Satisfied Customers: 34
Experience:  16 yrs service tech gm dealership
Type Your Chevy Question Here...
ssnyder is online now
A new question is answered every 9 seconds

How do i replace a water pump on a 2005 chevrolet malibu classic?

This answer was rated:

how do i replace a water pump on a 2005 chevrolet malibu classic?
hello i ll see if i can help what engine do you have
Customer: replied 7 years ago.

ok well i commen you if you are attem pting to do this yourself its a tough job but with a little patience you can do it

  1. Drain the coolant.
  2. Remove the thermostat housing pipe-to-cylinder bolt near the front of the engine.
  3. Remove the exhaust manifold heat shield and bolts.
  4. Remove the water pump access plate from the front cover.
  5. Remove the right hand wheel nuts and wheel assembly.
  6. Remove the right hand inner push-pins and splash shield
  7. Disconnect the engine coolant temperature sensor electrical connector
  8. Important: A drain plug has been provided at the bottom of the water pump assembly for additional coolant drainage from the engine block and water pump. Drain the coolant from the plug at the bottom of the water pump.
  9. Remove the thermostat housing bolts.
  10. Move the thermostat housing toward the left hand side of the vehicle while twisting the water feed pipe from the rear of the water pump assembly. Leave the coolant hoses and thermostat housing cover connected.
  11. Remove the water feed pipe.
  12. Discard the water pipe seals
  13. Important: The water pump holding tool supports the sprocket and chain during water pump service. The tool must be used or the balance shaft must be re-timed. Install the J 43651 into position.
  14. Tighten the bolts on the water pump holding tool into the threads on the water pump sprocket.
  15. Install the access cover bolts that were removed earlier to secure the water pump holding tool to the front cover assembly.
  16. Remove the 3 inner water pump sprocket to water pump blots
  17. Important: Be sure to remove both water pump retaining bolts from the front of the engine block. Remove the 2 water pump assembly bolts.
    1. Remove the rear 2 water pump assembly bolts.
    2. Remove the water pump assembly and water pump O-ring seal.

    Installation Procedure

  18. Important: Prior to installing the water pump assembly, read the entire procedure. This will help avoid balance shaft chain re-timing and ensure proper sealing. Install a new water pump assembly seal


    1. Important: A guide pin can be created to aid in water pump alignment. Use a M 6 m x 6 mm stud. Thread the pin into the water pump sprocket. Using the guide pin, align the pin with the water pump holding tool.
    2. Position the water pump assembly against the engine block and hand tighten the water pump bolts.
    3. Notice: Refer to Fastener Notice in Service Precautions. Install the inner water pump sprocket bolts. After 2 are snug, remove the guide pin and install the 3rd bolt.
      • Tighten the water pump bolts to 25 Nm (18 ft. lbs.) .
    1. Tighten the water pump socket bolts last.
      • Tighten the water pump sprocket-to-water pump bolts to 10 Nm (89 inch lbs.)
        1. Remove the J 43651.
        2. Install the water pump access plate and bolts.
          • Tighten the water pump access bolts-to-front cover to 10 Nm (89 inch lbs.) .
        1. Important: The water feed pipe seals can be lightly lubricated with silicone gel to aid in assembly. Install a new O-ring seal on the water feed p
        1. Install the thermostat housing to block seal onto the thermostat housing, if damaged.
        2. Install the water feed pipe into the water pump assembly.
        3. Align the water feed pipe to the thermostat housing assembly.
        4. Seat the water feed O-ring seal by pushing and twisting toward the water pump. Take care not to tear or damage the O-ring.
        5. The water feed pipe has a locating tab to assure proper alignment.
        6. Position the thermostat housing against the engine. Be sure that the thermostat housing pipe is properly positioned against the support bracket near the front of the engine.
        7. Install the thermostat housing to block bolts.
        1. Connect the electrical connector to coolant temperature sensor.
        2. Install the right hand inner splash shield and push pins.
        3. Install the right hand tire assembly and wheel nuts.
          • Tighten the wheel nuts to 125 Nm (92 ft. lbs.) .
        1. Lower the vehicle.
        2. Install the thermostat pipe bracket to cylinder head bolt.
          • Tighten the thermostat pipe bracket-to-cylinder head bolt to 8 Nm (71 inch lbs.) .
Customer: replied 7 years ago.
what is the J43651 and do u have any visual help with my instalation
Customer: replied 7 years ago.
sorry i i still dont know what the J43651 is. I would also like to ask how can i make sure i dont mess up the timebelt?
ok the j43651 is a special tool you will need to hold the timing chain in place so you dont have to re time it you can probably rent one at a local advance auto for around 10 - 12 bucks if not you wioll have to retime the whole thing but thats a whole nother bear
ssnyder, ASE Certified Technician
Category: Chevy
Satisfied Customers: 34
Experience: 16 yrs service tech gm dealership
ssnyder and 3 other Chevy Specialists are ready to help you

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

  • I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money. Todd L Rochester NY
< Previous | Next >
  • I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money. Todd L Rochester NY
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland

Meet The Experts:

  • GM Tech (Cam)

    GM Tech (Cam)

    Chevy Technician

    Satisfied Customers:

    GM Grand Master Technician 2007. 14 years experience.
< Last | Next >
  • GM Tech (Cam)'s Avatar

    GM Tech (Cam)

    Chevy Technician

    Satisfied Customers:

    GM Grand Master Technician 2007. 14 years experience.
  • Tim's Auto Repair's Avatar

    Tim's Auto Repair


    Satisfied Customers:

    Have owned a repair shop for 25 yrs.
  • Gary's Avatar


    Chevy Technician

    Satisfied Customers:

    15 years GM master tech
  • Dave Nova's Avatar

    Dave Nova

    Chevrolet Technician

    Satisfied Customers:

    ASE Master Certification. GM World Class Certification
  • John's Avatar


    Master A.S.E Automotive technician

    Satisfied Customers:

    A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician
  • Don 'Mo Lurch''s Avatar

    Don 'Mo Lurch'

    Auto Mech / Electronics

    Satisfied Customers:

    Chevrolet Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.
  • Ron Z.'s Avatar

    Ron Z.

    - Chevy Tech -

    Satisfied Customers:

    18+yrs experience. State Inspector and Chevy Diagnostics