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 MANUALSSUBARU1998LEGACY BRIGHTON WAGON AWD F4-2.2L SOHCREPAIR AND DIAGNOSISENGINE, COOLING AND EXHAUSTCOOLING SYSTEMHEATER CORESERVICE AND REPAIR
1998 Subaru Legacy Brighton Wagon AWD F4-2.2L SOHC
Heater Core: Service and Repair
1998 Subaru Legacy Brighton Wagon AWD F4-2.2L SOHCSECTION Service and Repair
Heater Core
1. Disconnect battery ground cable.
2. Disconnect inlet and outlet heater hoses in engine compartment. Drain as much coolant as possible from heater unit and plug disconnected hoses.
3. Disconnect heater control and mode door cables, then vacuum hose from heater unit joint as equipped.
4. Remove instrument panel as outlined under Instrument Panel, Gauges and Warning Indicators.
5. Remove heater unit.
6. Remove heater core from heater unit.
7. Reverse procedure to install, noting the following:
a. Fitted length of heater hose to pipe is 25 - 30mm (0.98 - 1.18 inch).
b. Torque heater unit attaching bolts to 5.4 - 9.3 Nm (4.0-6.9 ft. lbs).
1. Disconnect battery ground cable.
2. Disconnect inlet and outlet heater hoses in engine compartment. Drain as much coolant as possible from heater unit and plug disconnected hoses.
3. Disconnect heater control and mode door cables, then vacuum hose from heater unit joint as equipped.
4. Remove instrument panel as outlined under Instrument Panel, Gauges and Warning Indicators.
5. Remove heater unit.
6. Remove heater core from heater unit.
7. Reverse procedure to install, noting the following:
a. Fitted length of heater hose to pipe is 25 - 30mm (0.98 - 1.18 inch).
b. Torque heater unit attaching bolts to 5.4 - 9.3 Nm (4.0-6.9 ft. lbs).
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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.