How do you replace heater core on a 1998 f150 v8?
There is no short cut or fast way to do this. The dash has to
come out to access the heater box and replace the core. So the
steps in replacing the heater core are to disconnect the heater
hoses, remove the dash, to access the heater core cover on the
front of the heater case and replace the core. Reassembly is in the
reverse order as disassembly. Fill the cooling system with new
coolant, and burp the air form the cooling system. There is no
short cut or fast way to do this. The dash has to come out to
access the heater box and replace the core. So the steps in
replacing the heater core are to disconnect the heater hoses,
remove the dash, to access the heater core cover on the front of
the heater case and replace the core. Reassembly is in the reverse
order as disassembly. Fill the cooling system with new coolant, and
burp the air form the cooling system.