How to service the water pump on a 2.3L engine on Mercury Mariner?

Start coolant pump servicing of a 2.3L engine by hoisting the vehicle while keeping transmission in neutral. Start by draining the cooling system before proceeding to remove the accessory drive belt. The service begins by disassembling the three bolts holding the coolant pump pulley then removing the pulley before reinstallation requires tightening the bolts to 25 Nm (18 ft. lbs.). The process requires bolt removal from the three coolant pump anchors followed by O-ring seal disposal. Follow these steps to install the new pump while tightening it to 10 Nm (89 inch lbs.), then coat the new O-ring seal with clean engine coolant before performing the reversal of the removal process. Bleeding and filling of the cooling system completes the service operations.

OEM Mercury Mariner Water Pump

H2O Pump

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7 Water Pumps found

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Mercury Mariner Water Pump Part Number: EU2Z-8501-D
$120.59 MSRP: $194.55
You Save: $73.96 (39%)
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Product Specifications
- Other Name: Pump Assembly - Water; Engine Water Pump; Water Pump Assembly
- Replaces: 3M4Z-8501-BG, 5M8Z-8501-A, 3M4Z-8501-BJ, 5M8Z-8501-B, PW-481, PW-437, PW-440
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2007-2008 Mercury Mariner | Base, Luxury, Premier | 6 Cyl 3.0 L GAS
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Mercury Mariner Water Pump Part Number: 4S4Z-8501-E
$49.61 MSRP: $81.64
You Save: $32.03 (40%)
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Product Specifications
- Other Name: Pump Assembly - Water; Engine Water Pump; Water Pump Assembly
- Replaces: 6M8Z-8501-AC, PW-447, 1S7Z-8501-AK, 4S4Z-8501-AA, 4S4Z-8501-D, PW-465
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2011 Mercury Mariner | Base, Convenience, Hybrid, Premier | 4 Cyl 2.3 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.5 L GAS
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Mercury Mariner Water Pump Part Number: 9M6Z-8C419-A
$156.60 MSRP: $263.64
You Save: $107.04 (41%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pump Assembly; Engine Auxiliary Water Pump; Electric Water Pump; Engine Water Pump; Auxiliary Pump
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2009-2011 Mercury Mariner | Hybrid | 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV)
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Mercury Mariner Water Pump Part Number: 9L8Z-8501-A
$87.63 MSRP: $144.18
You Save: $56.55 (40%)
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Product Specifications
- Other Name: Pump Assembly - Water; Engine Water Pump
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2009-2011 Mercury Mariner | Base, Premier | 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS
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Mercury Mariner Water Pump Part Number: 5M6Z-8501-A
$197.95 MSRP: $336.36
You Save: $138.41 (42%)
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Product Specifications
- Other Name: Kit - Water Pump Repair; Auxiliary Pump
- Replaces: 6M6Z-8C419-A, 5M6Z-8C419-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2008 Mercury Mariner | Base, Hybrid, Premier | 4 Cyl 2.3 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS
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Mercury Mariner Water Pump Housing Part Number: 9L8Z-8501-C
Product Specifications
- Other Name: Pump Assembly - Water; Engine Water Pump Assembly; Water Pump Cover; Water Pump Assembly; Engine Water Pump; Water Pump
- Replaces: 9L8Z-8501-B
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2009-2011 Mercury Mariner | Base, Premier | 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS
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Mercury Mariner Water Pump Part Number: 5L8Z-8501-AA
Product Specifications
- Other Name: Pump Assembly - Water; Engine Water Pump; Water Pump Assembly
- Manufacturer Note: Water Pump Driven By Intake Camshaft
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2007 Mercury Mariner | Luxury, Premier | 6 Cyl 3.0 L GAS

Mercury Mariner Water Pump

OEM Water Pump boasts unmatched quality. Each part goes through full quality checks. They adhere to Mercury's official factory standards. These steps remove flaws and inconsistencies. So you can get Water Pump with long life and a perfect fit. Come to our website and find genuine Mercury Mariner parts. We keep a wide inventory of OEM Mariner parts at the highly affordable prices. It's easy to search, compare, and pick what you need. You'll love the clear info and simple checkout. We offer top-rated customer service, and we reply fast. We also ship promptly to ensure your order arrives on time.

Mercury Mariner vehicle's Water Pump is instrumental in circulating water from the radiator to the engine block where the heat produced through combustion is absorbed. Majority of models employ the use of aluminum castings with an articulated shaft and an impeller to circulate the coolant. The signs of a faulty Water Pump are concessions, noises that originate from the bearings, and excessive heat present in the engine. There are new high-intensity Performance Water Pumps to perform on high-intensity engines providing coolant flow and consuming low energy than the regular pumps. Electric Water Pumps are also an option, which has advantages like coolant circulation with or without the help of an engine and post shutdown cooling.

Mercury Mariner Water Pump Parts and Q&A

Water Pump
5L8Z-8501-AA
Q: How to service the water pump on a 2.3L engine on Mercury Mariner?
A:
Start coolant pump servicing of a 2.3L engine by hoisting the vehicle while keeping transmission in neutral. Start by draining the cooling system before proceeding to remove the accessory Drive Belt. The service begins by disassembling the three bolts holding the coolant pump pulley then removing the pulley before reinstallation requires tightening the bolts to 25 Nm (18 ft. lbs.). The process requires bolt removal from the three coolant pump anchors followed by O-ring seal disposal. Follow these steps to install the new pump while tightening it to 10 Nm (89 inch lbs.), then coat the new O-ring seal with clean engine coolant before performing the reversal of the removal process. Bleeding and filling of the cooling system completes the service operations.