E 250 3/4 Ton Van V8-5.4L CNG VIN M (1997)
Heater Core Case: Service and Repair
Heater Case
REMOVAL
1. Drain the engine cooling system.
WARNING: THE ENGINE MUST BE OFF, FULLY COOL AND THE COOLING SYSTEM FULLY DEPRESSURIZED BEFORE
ATTEMPTING TO DISCONNECT ANY HEATER WATER HOSES. FAILURE TO COMPLY WITH THIS WARNING CAN
RESULT IN SERIOUS INJURY AND BURNS FROM HOT LIQUID ESCAPING OUT OF THE ENGINE COOLING SYSTEM.
2. Disconnect the battery ground cable.
WARNING: TO AVOID ACCIDENTAL DEPLOYMENT AND POSSIBLE INJURY, THE AIR BAG SYSTEM BACKUP POWER
SUPPLY MUST BE DEPLETED BEFORE REPAIRING ANY CLIMATE CONTROL COMPONENTS. TO DEPLETE THE BACKUP
POWER SUPPLY, DISCONNECT THE BATTERY-TO-STARTER CABLE AND WAIT ONE MINUTE.
3. Disconnect the quick disconnect heater water hose couplings.
4. Plug the heater water hoses with a suitable 5/8-inch or 3/4-inch plug.
5. Remove the instrument panel.
6. Remove the heater case.
a. Remove the screw.
b. Remove the nuts.
c. Remove the heater case.
DISASSEMBLY
1. Remove the seal.
