How to service and repair the water pump on Mercury Cougar?

To service the water pump, drain the cooling system, loosen the pulley bolts, and remove the accessory drive belt. Then, remove the water pump bolts and raise the vehicle. Installation is the reverse of removal, followed by refilling the cooling system.

How to service the auxiliary water pump on Mercury Mariner?

In order to service the auxiliary coolant flow pump, use a hoist to raise the vehicle in neutral and empty the coolant. Take out the lower splash shield, de-connection of the heater hoses and electrical connector and unbolt the pump. Reassemble with bolts tightened 7 Nm, hose oiled and re-filled cooling system.

OEM Mercury Water Pump

H2O Pump

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45 Water Pumps found

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Mercury Water Pump Part Number: F7TZ-8501-AC
$84.07 MSRP: $135.64
You Save: $51.57 (39%)
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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: 6L2Z-8501-A
$108.18 MSRP: $178.00
You Save: $69.82 (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%)
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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
$49.92 MSRP: $79.27
You Save: $29.35 (38%)
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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
$49.93 MSRP: $80.55
You Save: $30.62 (39%)
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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
$135.24 MSRP: $218.18
You Save: $82.94 (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
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
$204.30 MSRP: $327.27
You Save: $122.97 (38%)
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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
$166.03 MSRP: $263.64
You Save: $97.61 (38%)
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
$101.21 MSRP: $160.36
You Save: $59.15 (37%)
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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%)
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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: 5M6Z-8501-A
$167.88 MSRP: $336.36
You Save: $168.48 (51%)
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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
$237.22 MSRP: $380.00
You Save: $142.78 (38%)
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%)
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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%)
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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
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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
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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%)
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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: 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
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Mercury Water Pump Part Number: 3R3Z-8501-A
$77.06 MSRP: $122.36
You Save: $45.30 (38%)
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: 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 Parts and Q&A

Water Pump
6U2Z-8501-D
Q: How to service and repair the water pump on Mercury Cougar?
A: To service the water pump, drain the cooling system, loosen the pulley bolts, and remove the accessory drive belt. Then, remove the water pump bolts and raise the vehicle. Installation is the reverse of removal, followed by refilling the cooling system.
Water Pump
4S4Z-8501-E
Q: How to service the auxiliary water pump on Mercury Mariner?
A: In order to service the auxiliary coolant flow pump, use a hoist to raise the vehicle in neutral and empty the coolant. Take out the lower splash shield, de-connection of the heater hoses and electrical connector and unbolt the pump. Reassemble with bolts tightened 7 Nm, hose oiled and re-filled cooling system.