How do you remove and clean the expansion tank on Mercury Mariner?

To remove and clean the coolant reservoir, start by draining the cooling system and disconnecting the reservoir hose. Then, remove the mounting nuts and lift the reservoir out of the engine compartment. Clean the reservoir with soapy water and a brush, checking for any cracks that may require replacement. Installation is the reverse of removal.

Genuine Mercury Mariner Coolant Reservoir

Coolant Tank Reservoir

Enter your vehicle info to find more parts and verify fitment

Select Vehicle by VIN
Select Vehicle by Model

Select by VIN

Enter your VIN for the most accurate results.

Select by Model

-- Select Make --

-- Select Model --

-- Select Year --

5 Coolant Reservoirs found

View related parts
Mercury Mariner Tank Assembly - Radiator Overflow
Part Number: 5L8Z-8A080-AA
- Other Name: Tank Assy - Radiator Overflow; Expansion Tank, Reservoir
$79.09 MSRP: $115.63
You Save: $36.54 (32%)

Add to Cart
More Info
Fits the following Vehicles:
2005-2007 Mercury Mariner | 4 Cyl 2.3L | 4AT CD4E, 5-Speed Manual Transmission, 5-Speed Manual Transmission - AK, 6-Speed Automatic Transmission 6F Mid-Range, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Right Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive, Two-Wheel Drive (Left Hand Drive), Two-Wheel Drive (Right Hand Drive)
Less Info
View related parts
Mercury Mariner Tank Assembly - Radiator Overflow
Part Number: BL8Z-8A080-A
- Other Name: Tank Assy - Radiator Overflow; Expansion Tank, Reservoir
- Manufacturer Note: Service Kit; Includes 8A080, Decals And Instruction Sheet.
- Replaces: BL8Z-8A080-B, YL8Z-8A080-AE
$154.61 MSRP: $226.03
You Save: $71.42 (32%)

Add to Cart
More Info
Fits the following Vehicles:
2005-2011 Mercury Mariner | 4 Cyl 2.3L, 4 Cyl 2.5L Duratec (110kW/150PS), 6 Cyl 3.0L DOHC EFI Modular, 6 Cyl 3.0L OHC Duratec | 4AT CD4E, 5-Speed Manual Transmission, 5-Speed Manual Transmission - AK, 6-Speed Automatic Transmission 6F Mid-Range, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Right Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive, Two-Wheel Drive (Left Hand Drive), Two-Wheel Drive (Right Hand Drive)
Less Info
View related parts
Mercury Mariner Tank Assembly - Radiator
Part Number: YL8Z-8A080-AE
- Other Name: Tank Assy - Radiator Overflow
- Replaced by: BL8Z-8A080-A
$154.61 MSRP: $226.03
You Save: $71.42 (32%)

Add to Cart
More Info
Fits the following Vehicles:
2005-2010 Mercury Mariner | 4 Cyl 2.3L, 4 Cyl 2.5L Duratec (110kW/150PS), 6 Cyl 3.0L DOHC EFI Modular, 6 Cyl 3.0L OHC Duratec | 4AT CD4E, 5-Speed Manual Transmission, 5-Speed Manual Transmission - AK, 6-Speed Automatic Transmission 6F Mid-Range, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Right Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive, Two-Wheel Drive (Left Hand Drive), Two-Wheel Drive (Right Hand Drive)
Less Info
View related parts
Mercury Mariner Tank Assembly - Radiator Overflow
Part Number: BM6Z-8A080-A
- Other Name: Expansion Tank, Overflow Hose, Reservoir
- Manufacturer Note: Service Kit; Includes 8A080, Decals And Instruction Sheet.
- Replaces: 5M6Z-8A080-AC, BM6Z-8A080-B
More Info
Fits the following Vehicles:
2005-2011 Mercury Mariner | 4 Cyl 2.3L Hybrid Gas/Electric DOHC, 4 Cyl 2.5L PFI Gas/Electric | 4AT CD4E, 5-Speed Manual Transmission - AK, 6-Speed Automatic Transmission 6F Mid-Range, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
Less Info
View related parts
Mercury Mariner Tank Assembly - Radiator
Part Number: 5M6Z-8A080-AC
- Other Name: Tank Assy - Radiator Overflow
- Replaced by: BM6Z-8A080-A
More Info
Fits the following Vehicles:
2005-2010 Mercury Mariner | 4 Cyl 2.3L Hybrid Gas/Electric DOHC, 4 Cyl 2.5L PFI Gas/Electric | 4AT CD4E, 5-Speed Manual Transmission - AK, 6-Speed Automatic Transmission 6F Mid-Range, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
Less Info

Mercury Mariner Coolant Reservoir Parts Questions & Answers

Tank Assembly - Radiator Overflow
5L8Z-8A080-AA
Q: How do you remove and clean the expansion tank on Mercury Mariner?
A: To remove and clean the coolant reservoir, start by draining the cooling system and disconnecting the reservoir hose. Then, remove the mounting nuts and lift the reservoir out of the engine compartment. Clean the reservoir with soapy water and a brush, checking for any cracks that may require replacement. Installation is the reverse of removal.