What are the signs of a failure in the water pump on Mercury Mountaineer?

Water pump failure can cause engine damage due to overheating. If the pump seal fails, coolant leaks from the front cover in V6 models or the water pump housing in V8 models. The water pump is located in the front cover for V6 engines and in a housing in the engine block for V8 engines. Water pumps have weep holes that can be checked for leaks with a flashlight. If there's heavy brown staining or visible coolant, the pump needs replacing. If the pump shaft bearings fail, a howling sound may be heard. Shaft wear can be felt by rocking the water pump pulley. Don't confuse drivebelt slippage, which causes a squealing sound, with pump bearing failure. A quick pump check is to turn on the heater; if the pump is failing, it won't circulate hot water efficiently.

Genuine Mercury Mountaineer Water Pump

H2O Pump

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5 Water Pumps found

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Mercury Mountaineer Water Pump Assembly
Part Number: 6L2Z-8501-A
$123.63 MSRP: $209.09
You Save: $85.46 (41%)
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Product Specifications
- Other Name: Pump Assy - Water; Water Pump, Water Pump Assembly
- Replaced by: 6L2Z-8501-C
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2006-2010 Mercury Mountaineer | 6 Cyl 4.0L SOHC EFI | 5-Speed Automatic Transmission 5R55S, 5-Speed Automatic Transmission 5R55W, 5-Speed Manual Transmission (M5R4), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission 6R60, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Part Time) (Left Hand Drive), Four-Wheel Drive (Part Time) (Right Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Mercury Mountaineer Water Pump Assembly
Part Number: F77Z-8501-AD
$129.08 MSRP: $209.09
You Save: $80.01 (39%)
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Product Specifications
- Other Name: Pump Assy - Water
- Manufacturer Note: #97JM 8501-AD - does not include 1L2Z-8507-AA gasket, SOHC
- Replaced by: 6L2Z-8501-C
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1998-2005 Mercury Mountaineer | 6 Cyl 4.0L, 6 Cyl 4.0L SOHC EFI | 4AT 4R70W, 5AT 5R55E, 5-Speed Automatic Transmission 5R55S, 5-Speed Automatic Transmission 5R55W, 5-Speed Manual Transmission (M5R4), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission 6R60, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Part Time) (Left Hand Drive), Four-Wheel Drive (Part Time) (Right Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Mercury Mountaineer Water Pump Assembly
Part Number: 5L2Z-8501-A
$57.80 MSRP: $93.64
You Save: $35.84 (39%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Pump Assy - Water
- Replaced by: 5L3Z-8501-AC
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2006-2010 Mercury Mountaineer | 8 Cyl 4.6L | 5-Speed Automatic Transmission 5R55S, 5-Speed Automatic Transmission 5R55W, 5-Speed Manual Transmission (M5R4), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission 6R60, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Part Time) (Left Hand Drive), Four-Wheel Drive (Part Time) (Right Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Mercury Mountaineer Water Pump Assembly
Part Number: 1L2Z-8501-BB
$57.80 MSRP: $93.64
You Save: $35.84 (39%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Pump Assy - Water
- Replaced by: 5L3Z-8501-AC
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2002-2005 Mercury Mountaineer | 8 Cyl 4.6L Romeo SOHC EFI | 5-Speed Automatic Transmission 5R55S, 5-Speed Automatic Transmission 5R55W, 5-Speed Manual Transmission (M5R4), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission 6R60, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Part Time) (Left Hand Drive), Four-Wheel Drive (Part Time) (Right Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Mercury Mountaineer Water Pump Assembly
Part Number: F87Z-8501-CA
Product Specifications
- Other Name: Pump Assy - Water; Water Pump, Water Pump Assembly
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1997-2001 Mercury Mountaineer | 8 Cyl 5.0L | 4AT 4R70W, 5AT 5R55E

Mercury Mountaineer Water Pump

The Water Pump in the Mercury Mountaineer helps regulate the temperature of your engine by circulating the coolant through the engine block and into the radiator. This saves you from worrying about overheating regardless of whether you are just going about your day to day errands or towing a heavy load. The early Mercury versions had cast-iron housings. However, the later Mountaineer versions applied lighter aluminum housings, which cut weight and resist corrosion. Any Water Pump uses a pulley driven by the crankshaft to spin a shaft riding on sealed bearings, regardless of material. An impeller inside the pump then pushes coolant from the lower radiator hose into the block's water jacket. The coolant is then returned to the radiator to release heat. Recent Mercury models introduced fully electric Water Pump units that disconnect the drive belt for precise flow at idle and better fuel economy than the traditional belt style. Carefully monitor for shaft seal leaks, rumbling bearings and a rising temperature gauge, as these signals will alert you of a Mountaineer Water Pump that may soon fail and threaten engine health in any Mountaineer. Every Mercury has a Water Pump that has been well serviced.

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Mercury Mountaineer Water Pump Parts Questions & Experts Answers

Water Pump Assembly
6L2Z-8501-A
Q: What are the signs of a failure in the water pump on Mercury Mountaineer?
A:
Water pump failure can cause engine damage due to overheating. If the pump seal fails, coolant leaks from the front cover in V6 models or the water pump housing in V8 models. The water pump is located in the front cover for V6 engines and in a housing in the engine block for V8 engines. Water pumps have weep holes that can be checked for leaks with a flashlight. If there's heavy brown staining or visible coolant, the pump needs replacing. If the pump shaft bearings fail, a howling sound may be heard. Shaft wear can be felt by rocking the water pump pulley. Don't confuse drivebelt slippage, which causes a squealing sound, with pump bearing failure. A quick pump check is to turn on the heater; if the pump is failing, it won't circulate hot water efficiently.