How to remove and install a water pump on Mercury Mountaineer?

Disconnect the cable from the negative battery terminal. Drain the cooling system. Remove the drive belt. Remove the engine cooling fan. Remove the water pump pulley. When loosening the bolts, hold the pulley with a strap or chain wrench to prevent it from turning. For V6 models, remove the bypass hose, the heater hose, and the lower radiator hose from the water pump. Remove the bolts attaching the water pump to the engine block and remove the pump from the engine. If the water pump is stuck, gently tap it with a soft-faced hammer to break the seal. Clean the bolt threads and the threaded holes in the engine and remove the corrosion and sealant. Remove all traces of old gasket material from the sealing surfaces. For V8 models, remove the water pump mounting bolts. Clean the O-ring surfaces on the pump and the housing. If you're installing the old pump, install a new O-ring. Clean the bolt threads and the threaded holes in the engine and remove the corrosion and debris. Compare the new pump to the old one to make sure that they're identical. On V6 models, apply a thin film of RTV sealant to hold the new gasket in place during installation. Make sure that the gasket is correctly positioned on the water pump and the engine block surface is clean and free of old gasket material. Carefully mate the pump to the water pump housing. Install the water pump bolts and tighten them to the torque. Don't overtighten the water pump bolts; doing so will damage the pump. The remainder of the installation is the reverse of removal. Refill the cooling system when you're done. Operate the engine to check for leaks.

OEM Mercury Water Pump

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45 Water Pumps found

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Mercury Water Pump Part Number: 6L2Z-8501-A
$127.08 MSRP: $209.09
You Save: $82.01 (40%)
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Product Specifications
- Other Name: Pump Assembly - Water; Engine Water Pump; Water Pump Assembly
- Replaced by: 6L2Z-8501-C
Fits the following Mercury Models:
- Mountaineer | 1998-2010 | Base, Convenience, Luxury, Premier | 6 Cyl 4.0 L FLEX, 6 Cyl 4.0 L GAS
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Mercury Water Pump Part Number: 5F1Z-8501-A
$68.95 MSRP: $113.45
You Save: $44.50 (40%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Pump Assembly - Water; Engine Water Pump; Water Pump Assembly
- Replaces: 1F1Z-8501-AA, PW-404, XF1Z-8501-AA
Fits the following Mercury Models:
- Sable | 1995-2005 | G, GS, LS, LS Premium, LTS, Platinum Edition | 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS
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Mercury Water Pump Part Number: 4S4Z-8501-E
$49.61 MSRP: $81.64
You Save: $32.03 (40%)
Ships in 1 Business Day
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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
Fits the following Mercury Models:
- Mariner | 2005-2011 | 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
- Milan | 2006-2011 | Base, Hybrid, Premier | 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 Water Pump Part Number: 3L3Z-8501-CA
$58.97 MSRP: $93.64
You Save: $34.67 (38%)
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Product Specifications
- Other Name: Pump Assembly - Water; Engine Water Pump; Water Pump Assembly
- Manufacturer Note: With M30 Hub
- Replaced by: 5L3Z-8501-AC
- Replaces: 5R3Z-8501-A, 5L2Z-8501-A, 1L2Z-8501-BB, F7UZ-8501-CA, F8AZ-8501-AA, PW-470, PW-387, YW7Z-8501-AA, AR3Z-8501-A, F4AZ-8501-A, AL3Z-8501-B, PW-499, YR3Z-8501-AB, YC2Z-8501-BA, PW-466, XC2Z-8501-BA
Fits the following Mercury Models:
- Cougar | 1994-1997 | XR-7 | 8 Cyl 4.6 L GAS
- Grand Marquis | 1992-2000 | GS, LS | 8 Cyl 4.6 L GAS
- Mountaineer | 2002-2010 | Base, Convenience, Luxury, Premier | 8 Cyl 4.6 L GAS
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Mercury Water Pump Part Number: EU2Z-8501-D
$120.59 MSRP: $194.55
You Save: $73.96 (39%)
Ships in 1-2 Business Days
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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
Fits the following Mercury Models:
- Mariner | 2007-2008 | Base, Luxury, Premier | 6 Cyl 3.0 L GAS
- Milan | 2006-2009 | Base, Premier | 6 Cyl 3.0 L GAS
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Mercury Water Pump Part Number: 9E5Z-8C419-B
$255.38 MSRP: $409.09
You Save: $153.71 (38%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pump Assembly; Drive Motor Inverter Cooler Water Pump; Electric Water Pump; Engine Water Pump; Auxiliary Pump
- Replaces: 9E5Z-8C419-A
Fits the following Mercury Models:
- Milan | 2010-2011 | Hybrid | 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV)
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Mercury 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
Fits the following Mercury Models:
- Mariner | 2009-2011 | Hybrid | 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV)
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Mercury Water Pump Part Number: AA5Z-8501-D
$100.99 MSRP: $160.36
You Save: $59.37 (38%)
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Product Specifications
- Other Name: Pump Assembly - Water; Engine Water Pump Assembly; Engine Water Pump; Water Pump Assembly
- Replaced by: AA5Z-8501-F
- Replaces: 7T4Z-8501-D, AA5Z-8501-A, 7T4Z-8501-C, PW-495, PW-489, PW-498
Fits the following Mercury Models:
- Sable | 2008-2009 | Base, Premier | 6 Cyl 3.5 L GAS
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Mercury Water Pump Part Number: F5DZ-8501-CL
$60.89 MSRP: $84.23
You Save: $23.34 (28%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Pump Assembly - Water; Engine Water Pump; Water Pump Assembly
- Replaces: F7DZ-8501-A
Fits the following Mercury Models:
- Sable | 1996-2000 | G, GS, LS, LS Premium | 6 Cyl 3.0 L GAS
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Mercury Water Pump Part Number: 3R3Z-8501-A
$72.89 MSRP: $122.36
You Save: $49.47 (41%)
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Product Specifications
- Other Name: Pump Assembly - Water; Engine Water Pump; Water Pump Assembly
- Replaces: 4U7Z-8501-A, 4U7Z-8501-B, 3R3Z-8501-BB
Fits the following Mercury Models:
- Cougar | 1996-1997 | XR-7 | 6 Cyl 3.8 L GAS, 8 Cyl 4.6 L GAS
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Mercury Water Pump Part Number: 5M6Z-8501-A
$197.95 MSRP: $336.36
You Save: $138.41 (42%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Kit - Water Pump Repair; Auxiliary Pump
- Replaces: 6M6Z-8C419-A, 5M6Z-8C419-A
Fits the following Mercury Models:
- Mariner | 2005-2008 | 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 Water Pump Part Number: EU2Z-8501-F
$228.86 MSRP: $380.00
You Save: $151.14 (40%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pump Assembly - Water; Engine Water Pump Assembly; Water Pump Assembly
- Replaces: EU2Z-8501-A
Fits the following Mercury Models:
- Montego | 2005-2007 | Luxury, Premier | 6 Cyl 3.0 L GAS
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Mercury Water Pump Part Number: F7CZ-8501-AB
$58.49 MSRP: $80.92
You Save: $22.43 (28%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Pump Assembly - Water; Engine Water Pump; Water Pump Assembly
- Manufacturer Note: SOHC
Fits the following Mercury Models:
- Tracer | 1997-1999 | GS, LS, Trio | 4 Cyl 2.0 L GAS
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Mercury Water Pump Part Number: XF5Z-8501-BA
$22.91 MSRP: $31.69
You Save: $8.78 (28%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Pump Assembly - Water; Engine Water Pump; Water Pump Assembly
Fits the following Mercury Models:
- Villager | 1999-2002 | Base, Estate, Sport | 6 Cyl 3.3 L GAS
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Mercury Water Pump Part Number: F4DZ-8501-A
$23.34 MSRP: $32.29
You Save: $8.95 (28%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Pump Assembly - Water; Engine Water Pump; Water Pump Assembly
Fits the following Mercury Models:
- Sable | 1994-1995 | GS, LS | 6 Cyl 3.8 L GAS
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Mercury Water Pump Part Number: F4PZ-8501-A
$10.42 MSRP: $14.42
You Save: $4.00 (28%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Pump Assembly - Water; Engine Water Pump; Water Pump Assembly
Fits the following Mercury Models:
- Sable | 1986-1995 | GS, LS, LTS | 6 Cyl 3.0 L GAS
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Mercury Water Pump Part Number: F5RZ-8501-B
$34.38 MSRP: $47.56
You Save: $13.18 (28%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Pump Assembly - Water; Engine Water Pump; Water Pump Assembly
Fits the following Mercury Models:
- Mystique | 1995-1997 | Base, GS, GS Spree, LS | 4 Cyl 2.0 L GAS
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Mercury Water Pump Part Number: F7TZ-8501-AC
$85.42 MSRP: $135.64
You Save: $50.22 (38%)
Product Specifications
- Other Name: Pump Assembly - Water; Engine Water Pump; Water Pump Assembly
- Replaces: F5TZ-8501-C, F7TZ-8501-AB, PW-349
Fits the following Mercury Models:
- Mountaineer | 1997-2001 | Base | 8 Cyl 5.0 L GAS
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Mercury Water Pump Part Number: 6U2Z-8501-D
$57.82 MSRP: $91.82
You Save: $34.00 (38%)
Product Specifications
- Other Name: Pump Assembly - Water; Engine Water Pump; Water Pump Assembly
- Replaces: F8RZ-8501-NE, F8RZ-8501-EN
Fits the following Mercury Models:
- Cougar | 1999-2002 | Base | 4 Cyl 2.0 L GAS
- Mystique | 1998-2000 | GS | 4 Cyl 2.0 L GAS
- Tracer | 1998-1999 | GS, LS, Trio | 4 Cyl 2.0 L GAS
View More
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Mercury Water Pump Part Number: F33Z-8501-A
Product Specifications
- Other Name: Pump Assembly - Water; Engine Water Pump; Water Pump Assembly
Fits the following Mercury Models:
- Topaz | 1992-1994 | GS, LS, LTS, Sport | 4 Cyl 2.3 L GAS

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1-20 of 45 Results

Mercury Water Pump

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Mercury Water Pump maintains cooling on the engines by pushing coolant through critical channels in a fast and consistent manner. Mercury gained its following through a perfect combination of a smooth ride, crisp lines, and cabins that reduce road noise such that the family can speak and not scream during long distance runs. Intuitive gauges are met with leather trims and provide a sense of control that is more valuable than the window sticker. Finding that balance between float and feedback, Mercury continued to keep at it with suspension tuning year after year. Customers had confidence in Mercury to offer value without compromising ride softness and cabin space. The lengthy highway drags became less tiresome since road roughness was kept away and the controls were dropped at the location of the hands. The badge went out of showrooms in 2011, but its offer of easy commuting and genuine pricing continues to create fan clubs today. Water Pump is mounted on the front of the block and is turned by the belt to ensure that coolant flows whenever the revs increase to avoid hot spots that surround the cylinders. Lightweight aluminum housing reduces weight and corrosion and a smaller impeller gap transfers more fluid and steals less horsepower. When the Water Pump gives a notice that it is getting ready to leave, it starts overheating, leaking, or whining, then it is time to cook the engine. Other drivers fit an electric Water Pump in order to reduce parasitic loss and to stabilize the flow of coolant when traffic is at a crawl. Any system Mercury combines the Water Pump with broad apertures in the radiator to vent heat rapidly on scorching summer grids.

Mercury Water Pump Parts and Q&A

Water Pump
6L2Z-8501-A
Q: How to remove and install a water pump on Mercury Mountaineer?
A:
Disconnect the cable from the negative battery terminal. Drain the cooling system. Remove the drive belt. Remove the engine cooling fan. Remove the water pump pulley. When loosening the bolts, hold the pulley with a strap or chain wrench to prevent it from turning. For V6 models, remove the bypass hose, the heater hose, and the lower radiator hose from the water pump. Remove the bolts attaching the water pump to the engine block and remove the pump from the engine. If the water pump is stuck, gently tap it with a soft-faced hammer to break the seal. Clean the bolt threads and the threaded holes in the engine and remove the corrosion and sealant. Remove all traces of old gasket material from the sealing surfaces. For V8 models, remove the water pump mounting bolts. Clean the O-ring surfaces on the pump and the housing. If you're installing the old pump, install a new O-ring. Clean the bolt threads and the threaded holes in the engine and remove the corrosion and debris. Compare the new pump to the old one to make sure that they're identical. On V6 models, apply a thin film of RTV sealant to hold the new gasket in place during installation. Make sure that the gasket is correctly positioned on the water pump and the engine block surface is clean and free of old gasket material. Carefully mate the pump to the water pump housing. Install the water pump bolts and tighten them to the torque. Don't overtighten the water pump bolts; doing so will damage the pump. The remainder of the installation is the reverse of removal. Refill the cooling system when you're done. Operate the engine to check for leaks.