Replaces

Engine Water Pump ACDelco 251-742 - ACEWP00002

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How-To & Tools
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Vehicle Fit

Part Details

  • Product Line:   GM Original Equipment

Specifications:

  • Brand New AC Delco GM Original Equipment Water Pump
  • Direct replacement
  • Built to strict quality control standards
  • No core charge

Your water pump is a major component of your engine cooling system. If the water pump fails, the engine will overheat causing it to shut down. Water pumps have an indicator that tells you when they are going bad. There is a small hole in the water pump right under the shaft in the middle that the pulley bolts to. As the water pump's bearings wear out coolant seeps by them and leaks through this hole. If you notice a few drops of coolant under the front of your engine this is an indicator your pump is failing. If a water pump fails it will cause engine overheating, and possibly further engine damage. If you have noticed little drops of coolant under the front of your vehicle then inspect the bottom of the water pump to see if it is dripping out of the indicator hole. If your water pump is the problem, then this part is for you.

Item Condition: New

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser.

  1. step : Draining the Coolant (0:42)
    • Twist off the coolant reservoir cap fill cap
    • Jack up the vehicle
    • Remove the eight clips from the plastic cover underneath the engine with pliers
    • Remove the six clips from the front panel with a flat blade screwdriver and pliers
    • Have a drain pan ready underneath the radiator hose
    • Push the teeth together on the pliers onto the hose
    • Allow the coolant to drain
    • Reinstall the radiator drain plug
  2. step : Remove the Air Intake Box (2:21)
    • Remove the oil cap and the engine cover
    • Twist the oil cap
    • Disconnect the vacuum hose from the air intake box
    • Loosen the two hose clamps
    • Pull the air intake box up and out
  3. step : Removing the Tensioner Belt (2:58)
    • Use a 1/2 inch ratchet into the tensioner belt slot to release the slack
    • Remove the belt from the pulleys and slowly let up on the ratchet
    • Loosen the four 10mm bolts from the water pump pulley
    • Tuck the belt behind the tensioner to release it
  4. step : Removing the Water Pump (3:35)
    • Remove the four 10mm bolts from the water pump pulley
    • Remove the six 10mm bolts from the water pump
    • Place a drip pan below
    • Remove the water pump
    • Remove the gasket and clean with an emery cloth
  5. step : Installing the New (5:00)
    • Feed the water pump into place
    • Twist the a 10mm bolt on by hand
    • Tighten the six 10mm bolts onto the water pump
    • Torque each to bolt to 11 ft/lbs and then 22 ft/lbs
    • Put the pulley in place and replace and tighten the four 10mm bolts
  6. step : Installing the Tension Belt (6:10)
    • Feed the tension belt under the crank, up behind the pulley, and over the pulley
    • Push down on the tensioner with a 1/2 inch ratchet
    • Follow the tension belt diagram
    • Torque the pulley bolts to 11 ft/lbs
  7. step : Reinstalling the Air Intake Box (7:10)
    • Place the air intake box
    • Reattach the hoses
    • Tighten the hose clamps with a flat blade screwdriver
    • Replace the vacuum hose into the intake air box
    • Remove the oil cap
    • Replace the engine cover
    • Replace the oil cap
  8. step : Refilling the Coolant Reservoir (8:10)
    • Replace the panel beneath the engine
    • Replace the six clips on the front of the panel
    • Replace the eight clips on the panel
    • Fill the coolant reservoir bottle to the max fill line
    • Replace the cap
    • Start the vehicle and let the coolant run through
    • Run the engine and check the coolant level
    • Work the air out of the system

Tools needed for replacement:

    General Tools

  • Drain Pan
  • Floor Jack
  • Funnel
  • Jack Stands

  • Materials, Fluids, and Supplies

  • Anti-Freeze
  • Cloth Rags

  • Pliers, Cutters & misc Wrenches

  • Needle nose pliers

  • Ratchets & Related

  • 1/2 Inch Ratchet
  • Ratchet
  • Torque Wrench

  • Screwdrivers & Related

  • Flat Blade Screwdriver

  • Sockets - Metric

  • 10mm Socket

  • Sockets - SAE

  • 1/2 Inch Socket

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Year Make Model Description
2005-2010Buick Allure Buick Allure Engine Water Pump GM Original Equipment V6 3.6L ACDelco 251-742
2010Buick Allure Buick Allure Engine Water Pump GM Original Equipment V6 3.0L ACDelco 251-742
2008-2017Buick Enclave Buick Enclave Engine Water Pump GM Original Equipment ACDelco 251-742
2005-2008Buick LaCrosse Buick LaCrosse Engine Water Pump GM Original Equipment V6 3.6L ACDelco 251-742
2010Buick LaCrosse Buick LaCrosse Engine Water Pump GM Original Equipment V6 3.0L ACDelco 251-742
2010-2016Buick LaCrosse Buick LaCrosse Engine Water Pump GM Original Equipment V6 3.6L ACDelco 251-742
2004-2006Buick Rendezvous Buick Rendezvous Engine Water Pump GM Original Equipment V6 3.6L ACDelco 251-742
2013-2015Cadillac ATS Cadillac ATS Engine Water Pump GM Original Equipment V6 3.6L ACDelco 251-742
2004-2007Cadillac CTS Cadillac CTS Engine Water Pump GM Original Equipment V6 3.6L ACDelco 251-742
2005-2007Cadillac CTS Cadillac CTS Engine Water Pump GM Original Equipment V6 2.8L ACDelco 251-742
2008-2010Cadillac CTS Cadillac CTS Engine Water Pump GM Original Equipment (8th Vin Digit V) V6 3.6L ACDelco 251-742
2008-2009Cadillac CTS Cadillac CTS Engine Water Pump GM Original Equipment (8th Vin Digit 7) V6 3.6L ACDelco 251-742
2010-2014Cadillac CTS Cadillac CTS Engine Water Pump GM Original Equipment V6 3.0L ACDelco 251-742
2011-2015Cadillac CTS Cadillac CTS Engine Water Pump GM Original Equipment V6 3.6L ACDelco 251-742
2004-2009Cadillac SRX Cadillac SRX Engine Water Pump GM Original Equipment V6 3.6L ACDelco 251-742
2010-2011Cadillac SRX Cadillac SRX Engine Water Pump GM Original Equipment V6 2.8L ACDelco 251-742
2010-2011Cadillac SRX Cadillac SRX Engine Water Pump GM Original Equipment V6 3.0L ACDelco 251-742
2012-2016Cadillac SRX Cadillac SRX Engine Water Pump GM Original Equipment ACDelco 251-742
2005-2007Cadillac STS Cadillac STS Engine Water Pump GM Original Equipment V6 3.6L ACDelco 251-742
2013-2017Cadillac XTS Cadillac XTS Engine Water Pump GM Original Equipment ACDelco 251-742
2010-2014Chevy Camaro Chevy Camaro Engine Water Pump GM Original Equipment V6 3.6L ACDelco 251-742
2012-2016Chevy Caprice Chevy Caprice Engine Water Pump GM Original Equipment V6 3.6L ACDelco 251-742
2008-2009Chevy Equinox Chevy Equinox Engine Water Pump GM Original Equipment V6 3.6L ACDelco 251-742
2010-2012Chevy Equinox Chevy Equinox Engine Water Pump GM Original Equipment V6 3.0L ACDelco 251-742
2012-2017Chevy Impala Chevy Impala Engine Water Pump GM Original Equipment ACDelco 251-742
2008Chevy Malibu Chevy Malibu New Body Style Engine Water Pump GM Original Equipment V6 3.6L ACDelco 251-742
2009-2012Chevy Malibu Chevy Malibu Engine Water Pump GM Original Equipment V6 3.6L ACDelco 251-742
2009-2012Chevy Traverse Chevy Traverse Engine Water Pump GM Original Equipment ACDelco 251-742
2007GMC Acadia GMC Acadia Engine Water Pump GM Original Equipment ACDelco 251-742
2010-2012GMC Terrain GMC Terrain Engine Water Pump GM Original Equipment V6 3.0L ACDelco 251-742
2007-2009Pontiac G6 Pontiac G6 Engine Water Pump GM Original Equipment V6 3.6L ACDelco 251-742
2008-2009Pontiac G8 Pontiac G8 Engine Water Pump GM Original Equipment V6 3.6L ACDelco 251-742
2008-2009Pontiac Torrent Pontiac Torrent Engine Water Pump GM Original Equipment V6 3.6L ACDelco 251-742
2006-2009Saab 9-3 Saab 9-3 Engine Water Pump GM Original Equipment Turbo V6 2.8L ACDelco 251-742
2010-2011Saab 9-5 Saab 9-5 Engine Water Pump GM Original Equipment V6 2.8L ACDelco 251-742
2007-2009Saturn Aura Saturn Aura Engine Water Pump GM Original Equipment V6 3.6L ACDelco 251-742
2007-2010Saturn Outlook Saturn Outlook Engine Water Pump GM Original Equipment ACDelco 251-742
2008-2010Saturn Vue Saturn Vue Engine Water Pump GM Original Equipment V6 3.6L ACDelco 251-742
Only 2 left in stock
Part #: ACEWP00002


Order must be placed by 4pm ET

Get it in: 2 - 4 Business Days

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AC DELCO
Brand #: 251-742

How-to Video:

(09:50 min)