How should a heater core leak be tested and what is the removal procedure on Mercury Grand Marquis?

In case of a heater core leakage, carry out a leak test prior to taking it out of the car. Begin by removing the plenum chamber, screws and heater core cover. Use a soft cutter to cut the seal above the inlet and outlet tubes in a bid to remove the heater core. These steps can be reversed so as to install.

OEM Mercury Grand Marquis Heater Core

HVAC Heater Core

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3 Heater Cores found

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Mercury Grand Marquis Heater Core Part Number: H2MZ-18476-J
Product Specifications
- Other Name: Heater Assembly - Less Radiator; HVAC Heater Core; Core
- Replaces: HC-31
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1990-2011 Mercury Grand Marquis | GS, GSL, Limited Edition, LS, LSE, Ultimate Edition | 8 Cyl 4.6 L FLEX, 8 Cyl 4.6 L GAS, 8 Cyl 5.0 L GAS
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Mercury Grand Marquis Heater Core Part Number: H2MZ-18476-H
Product Specifications
- Other Name: Heater Assembly - Less Radiator; HVAC Heater Core
- Replaces: HC-20, F8VZ-18476-AA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1998-2000 Mercury Grand Marquis | GS, LS | 8 Cyl 4.6 L GAS
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Mercury Grand Marquis Heater Core Part Number: E3AZ-18476-E
Product Specifications
- Other Name: Heater Assembly - Less Radiator; HVAC Heater Core; Core
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1984-1991 Mercury Grand Marquis | Base, Colony Park, GS, LS | 8 Cyl 5.0 L GAS, 8 Cyl 5.8 L GAS

Mercury Grand Marquis Heater Core

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Mercury Grand Marquis Heater Core Parts and Q&A

Heater Core
H2MZ-18476-J
Q: How should a heater core leak be tested and what is the removal procedure on Mercury Grand Marquis?
A: In case of a heater core leakage, carry out a leak test prior to taking it out of the car. Begin by removing the plenum chamber, screws and heater core cover. Use a soft cutter to cut the seal above the inlet and outlet tubes in a bid to remove the heater core. These steps can be reversed so as to install.