How to service the coolant reservoir safely on Mercury Mariner?

Before accessing the coolant reservoir ensure the engine temperature is cool since the cooling system operates with pressure which leads to strong steam and hot liquid discharge that could injure the technician. First step includes opening the cooling system pressure through counterclockwise turns of one half rotation on the pressure cap followed by its removal. A suction device requires hose clamp pliers to draw the coolant from the degas bottle which is connected to the radiator through the hose clamp utility. When installing the degas bottle disconnect the hose that connects the radiator to the bottle by loosening the two bottle retaining nuts to 6 Nm (53 lb-in) torque spec. The degas bottle raises before disconnecting the degas bottle-to-radiator hose for removal of the bottle. The installation process requires following the opposite steps from removal then filling the degas bottle to its designated specifications.

OEM Mercury Mariner Coolant Reservoir

Coolant Tank Reservoir

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4 Coolant Reservoirs found

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Mercury Mariner Reservoir, Driver Side
Part Number: 1L8Z-8A080-BB
$53.87 MSRP: $77.07
You Save: $23.20 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Tank Assembly - Radiator Overflow; Engine Coolant Reservoir; Coolant Reservoir
- Position: Driver Side
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2007 Mercury Mariner | Luxury, Premier | 6 Cyl 3.0 L GAS
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Mercury Mariner Expansion Tank
Part Number: BL8Z-8A080-A
$176.16 MSRP: $256.42
You Save: $80.26 (32%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Tank Assembly - Radiator Overflow; Engine Coolant Reservoir; Reservoir; Coolant Reservoir
- Manufacturer Note: Service Kit; Includes 8A080, Decals And Instruction Sheet.
- Replaces: BL8Z-8A080-B, YL8Z-8A080-AE
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2011 Mercury Mariner | Base, Luxury, Premier | 4 Cyl 2.5 L GAS, 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS
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Mercury Mariner Expansion Tank
Part Number: 5L8Z-8A080-AA
$83.23 MSRP: $128.08
You Save: $44.85 (36%)
ADD TO CART
Product Specifications
- Other Name: Tank Assembly - Radiator Overflow; Engine Coolant Reservoir; Reservoir; Coolant Reservoir
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2008 Mercury Mariner | Base, Convenience, 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 Mariner Expansion Tank
Part Number: BM6Z-8A080-A
$142.84 MSRP: $194.37
You Save: $51.53 (27%)
ADD TO CART
Product Specifications
- Other Name: Tank Assembly - Radiator Overflow; Engine Coolant Reservoir; Multi Purpose Hose; Overflow Hose; Reservoir; Coolant Reservoir
- Manufacturer Note: Service Kit; Includes 8A080, Decals And Instruction Sheet.
- Replaces: BM6Z-8A080-B, 5M6Z-8A080-AC
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2006-2011 Mercury Mariner | Hybrid | 4 Cyl 2.3 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 2.5 L FULL HYBRID EV-GAS (FHEV)

Mercury Mariner Coolant Reservoir

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Mercury Mariner Coolant Reservoir Parts Questions & Experts Answers

Expansion Tank
BL8Z-8A080-A
Q: How to service the coolant reservoir safely on Mercury Mariner?
A: Before accessing the coolant reservoir ensure the engine temperature is cool since the cooling system operates with pressure which leads to strong steam and hot liquid discharge that could injure the technician. First step includes opening the cooling system pressure through counterclockwise turns of one half rotation on the pressure cap followed by its removal. A suction device requires hose clamp pliers to draw the coolant from the degas bottle which is connected to the Radiator through the hose clamp utility. When installing the degas bottle disconnect the hose that connects the radiator to the bottle by loosening the two bottle retaining nuts to 6 Nm (53 lb-in) torque spec. The degas bottle raises before disconnecting the degas bottle-to-radiator hose for removal of the bottle. The installation process requires following the opposite steps from removal then filling the degas bottle to its designated specifications.