Econoline E350 1 Ton V8-5.4L CNG VIN M (1999)
Heater Core: Service and Repair
Heating and Defrosting
REMOVAL
1. Drain the engine cooling system.
2. Disconnect the battery ground cable.
3. Disconnect the quick disconnect heater hose couplings at the heater core. See: Heater Hose/Service and Repair/Heater Hose Couplings
4. Plug the heater water hoses with a suitable 5/8-inch or 3/4-inch plug.
5. Remove the engine cover.
6. Remove the instrument panel finish panel.
7. Remove the heater core cover.
1. Remove the seven screws.
2. Remove the heater core cover.
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Remove and discard the heater core case seal.
8. Remove the heater core.
NOTE: Use care not to spill the coolant remaining in the heater core during removal.