How to service the thermostat and thermostat housing for the 4.0L SOHC engine on Mercury Mountaineer?

To maintain the thermostat and the housing of the 4.0L SOHC engine, draint the cooling system then take out the parts sequentially. Check and change gaskets when there is any damage. Follow the same steps in order to remove the procedure, and complete the service by filling and bleeding the cooling system.

How to service the thermostat housing on a 4.0L SOHC engine on Mercury Mountaineer?

In order to service the thermostat housing of a 4.0L SOHC with engine, drain the cooling system, disconnect the ECT sensor and remove the upper radiator and heater hoses. Take off the thermostat housing bolts, screw the new housing and O-ring into place and screw bolts to 12 Nm (9 lb-ft). Turn it back to complete.

OEM Mercury Mountaineer Thermostat Housing

Engine Coolant Thermostat Housing

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8 Thermostat Housings found

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Mercury Mountaineer Thermostat Housing, Lower Part Number: GL2Z-8592-A
$43.17 MSRP: $62.83
You Save: $19.66 (32%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Connection Water Outlet; Engine Coolant Thermostat Housing, Lower; Thermostat Housing Cover; Lower Housing
- Position: Lower
- Replaces: 1L2Z-8592-BB, RH-148, RH-93
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2001-2010 Mercury Mountaineer | Base, Convenience, Luxury, Premier | 6 Cyl 4.0 L FLEX, 6 Cyl 4.0 L GAS, 8 Cyl 4.6 L GAS
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Mercury Mountaineer Thermostat Housing, Lower Part Number: 2L5Z-8592-BB
$51.07 MSRP: $74.33
You Save: $23.26 (32%)
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Product Specifications
- Other Name: Connection Water Outlet; Engine Coolant Thermostat Housing, Lower; Engine Coolant Water Outlet; Thermostat Housing Cover; Connection - Water Outlet; Water Outlet
- Manufacturer Note: Housing For 2 Clip In Style Sensors
- Position: Lower
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2001 Mercury Mountaineer | Base | 6 Cyl 4.0 L GAS
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Mercury Mountaineer Water Outlet, Upper Part Number: 6L2Z-8592-FA
$19.47 MSRP: $28.33
You Save: $8.86 (32%)
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Product Specifications
- Other Name: Connection Water Outlet; Engine Coolant Thermostat Housing, Upper; Engine Coolant Water Outlet; Upper Housing; Connection - Water Outlet
- Manufacturer Note: Plastic Housing
- Position: Upper
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2006-2010 Mercury Mountaineer | Base, Convenience, Luxury, Premier | 6 Cyl 4.0 L GAS, 8 Cyl 4.6 L GAS
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Mercury Mountaineer Upper Housing Part Number: 2L2Z-8592-AA
$23.93 MSRP: $34.83
You Save: $10.90 (32%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Connection Water Outlet; Engine Coolant Thermostat Housing, Upper; Engine Coolant Water Outlet; Connection - Water Outlet; Engine Coolant Thermostat Housing; Water Outlet
- Position: Upper
- Replaces: 1L2Z-8592-AA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2002-2005 Mercury Mountaineer | Base, Convenience, Luxury, Premier | 6 Cyl 4.0 L FLEX, 6 Cyl 4.0 L GAS
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Mercury Mountaineer Thermostat Housing Part Number: FOZZ-8592-B
$123.76 MSRP: $186.67
You Save: $62.91 (34%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Connection Water Outlet; Engine Coolant Thermostat Housing; Thermostat Housing Cover; Connection - Water Outlet; Water Outlet
- Replaces: FOZZ-8592-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1999-2001 Mercury Mountaineer | Base | 8 Cyl 5.0 L GAS
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Mercury Mountaineer Thermostat Housing Part Number: F6AZ-8592-AB
Product Specifications
- Other Name: Connection Water Outlet; Thermostat Housing Cover; Outlet Assembly; Connection - Water Outlet
- Manufacturer Note: CONNECTOR
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2002-2005 Mercury Mountaineer | Base, Convenience, Luxury, Premier | 8 Cyl 4.6 L GAS
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Mercury Mountaineer Thermostat Housing Part Number: F5TZ-8592-CA
Product Specifications
- Other Name: Connection - Water Outlet; Thermostat Housing Cover
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1997-1998 Mercury Mountaineer | Base | 8 Cyl 5.0 L GAS
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Mercury Mountaineer Thermostat Housing, Upper Part Number: 7R3Z-8592-A
$25.85 MSRP: $36.67
You Save: $10.82 (30%)
Product Specifications
- Other Name: Connection Water Outlet; Engine Coolant Thermostat Housing, Upper; Engine Coolant Water Outlet; Thermostat Housing Cover; Water Outlet; Thermostat Outlet; Upper Housing; Connection - Water Outlet
- Position: Upper
- Replaces: 6L2Z-8592-DA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2010 Mercury Mountaineer | Convenience, Luxury, Premier | 8 Cyl 4.6 L GAS

Mercury Mountaineer Thermostat Housing

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Mercury Mountaineer Thermostat Housing Parts and Q&A

Upper Housing
2L2Z-8592-AA
Q: How to service the thermostat and thermostat housing for the 4.0L SOHC engine on Mercury Mountaineer?
A: To maintain the Thermostat and the housing of the 4.0L SOHC engine, draint the cooling system then take out the parts sequentially. Check and change gaskets when there is any damage. Follow the same steps in order to remove the procedure, and complete the service by filling and bleeding the cooling system.
Water Outlet, Upper
6L2Z-8592-FA
Q: How to service the thermostat housing on a 4.0L SOHC engine on Mercury Mountaineer?
A: In order to service the thermostat housing of a 4.0L SOHC with engine, drain the cooling system, disconnect the ECT sensor and remove the upper radiator and heater hoses. Take off the thermostat housing bolts, screw the new housing and O-ring into place and screw bolts to 12 Nm (9 lb-ft). Turn it back to complete.