Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSJAGUAR1991XJ-6 L6-4.0LREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGHEATER CORESERVICE AND REPAIR
1991 Jaguar XJ-6 L6-4.0L
Heater Core: Service and Repair
1991 Jaguar XJ-6 L6-4.0LSECTION Service and Repair
Heater Matrix
Removal
1. Open the bonnet ensure the engine is cold, drain the engine coolant into a suitable container.
2. Disconnect the battery earth lead.
3. Open the car door and remove the dash liners and the steering wheel.
4. Remove the screws securing the instrument pack.
5. Disconnect the instrument pack cable harness multi-plug connectors and remove the pack assembly. Remove the glove box and the glove box lid.
6. Remove the screws securing the heater matrix pipe housing and remove the pipe housing halves.
7. Remove the foam pad from the pipes.
8. Remove the screws securing the pipes, reposition the pipes and remove the pipe gaskets.
9. Remove the screws securing the electronic control module and reposition the module for access to the screws securing the matrix housing.
10. Remove the screws securing the heater matrix housing and remove the housing.
11. Displace and remove the matrix.
12. Remove the foam strip from the matrix.
Installation
NOTE:
- Installation is the reverse of the removal procedure.
- Ensure all electrical connection are clean and secure.
- Refill the engine cooling system with specified coolant.
Removal
1. Open the bonnet ensure the engine is cold, drain the engine coolant into a suitable container.
2. Disconnect the battery earth lead.
3. Open the car door and remove the dash liners and the steering wheel.
4. Remove the screws securing the instrument pack.
5. Disconnect the instrument pack cable harness multi-plug connectors and remove the pack assembly. Remove the glove box and the glove box lid.
6. Remove the screws securing the heater matrix pipe housing and remove the pipe housing halves.
7. Remove the foam pad from the pipes.
8. Remove the screws securing the pipes, reposition the pipes and remove the pipe gaskets.
9. Remove the screws securing the electronic control module and reposition the module for access to the screws securing the matrix housing.
10. Remove the screws securing the heater matrix housing and remove the housing.
11. Displace and remove the matrix.
12. Remove the foam strip from the matrix.
Installation
NOTE:
- Installation is the reverse of the removal procedure.
- Ensure all electrical connection are clean and secure.
- Refill the engine cooling system with specified coolant.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.