How to service the thermostat housing on a 2.3L engine on Mercury Mariner?

In order to service the thermostat housing, which belongs to a 2.3L engine, it is necessary to hoist the vehicle and empty the cooling system. Disassemble the accessory drive belt, the heater hose, and lower radiator hose. Unscrew the housing bolts of the thermostat, replace with the new one at 10 Nm and repeat the process. Then fill and bleed the cooling system.

How to Properly Address Issues with the Thermostat Housing on a 2.3L Engine in a Mercury Mariner?

In order to service the thermostat housing on a 2.3l engine, place the vehicle in neutral on a hoist. Disconnect the accessory drive belt, hoses and drain the cooling system. Take off the housing bolts, put in the new housing with tightening of 10 Nm and fill and bleed the cooling system.

OEM Mercury Mariner Thermostat Housing

Engine Coolant Thermostat Housing

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3 Thermostat Housings found

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Mercury Mariner Drain Hose Connector, Rear Part Number: 8L8Z-8592-B
$13.78 MSRP: $18.75
You Save: $4.97 (27%)
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Product Specifications
- Other Name: Connection Water Outlet; Sunroof Drain Hose Adapter, Rear
- Position: Rear
- Replaces: RH-182, 8L8Z-8592-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2008-2011 Mercury Mariner | Base, 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, 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS
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Mercury Mariner Thermostat Housing, Lower Part Number: 2M2Z-8592-CD
$81.94 MSRP: $123.58
You Save: $41.64 (34%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Connection Water Outlet; Engine Coolant Thermostat Housing, Lower; Thermostat Housing Cover; Connection - Water Outlet; Engine Coolant Thermostat Housing; Water Outlet
- Position: Lower
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2008 Mercury Mariner | Base, Luxury, Premier | 6 Cyl 3.0 L GAS
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Mercury Mariner Water Outlet Part Number: 9L8Z-8592-A
$23.99 MSRP: $32.64
You Save: $8.65 (27%)
ADD TO CART
Product Specifications
- Other Name: Connection Water Outlet; Engine Coolant Inlet Flange; Engine Coolant Water Outlet; Connector; Connection - Water Outlet
- 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

Mercury Mariner Thermostat Housing

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Mercury Mariner Thermostat Housing Parts and Q&A

Thermostat Housing, Lower
2M2Z-8592-CD
Q: How to service the thermostat housing on a 2.3L engine on Mercury Mariner?
A: In order to service the thermostat housing, which belongs to a 2.3L engine, it is necessary to hoist the vehicle and empty the cooling system. Disassemble the accessory Drive Belt, the heater hose, and lower radiator hose. Unscrew the housing bolts of the thermostat, replace with the new one at 10 Nm and repeat the process. Then fill and bleed the cooling system.
Drain Hose Connector, Rear
8L8Z-8592-B
Q: How to Properly Address Issues with the Thermostat Housing on a 2.3L Engine in a Mercury Mariner?
A: In order to service the thermostat housing on a 2.3l engine, place the vehicle in neutral on a hoist. Disconnect the accessory Drive Belt, hoses and drain the cooling system. Take off the housing bolts, put in the new housing with tightening of 10 Nm and fill and bleed the cooling system.