How to Disassemble the Heater Core of an Old Jetta?
1 Answers
The method for disassembling the heater core of an old Jetta mainly involves the following steps: 1. Drain the coolant from the cooling system. Remove the control panel. Separate the cable fixture on the left side of the heater assembly and remove the screws on the terminal posts. Disconnect the wiring connector behind the blower motor. 2. Disconnect the vacuum tube and the lighting wire behind the heater control unit. Place a container under the heater assembly's water supply pipe at the back of the cylinder head, beneath the engine. Disconnect the heater assembly's water supply pipe at the back of the cylinder head. Disconnect the heater assembly's return hose on the thermostat housing, insert the foot pump hose into the heater assembly's return pipe, push the coolant from the water supply pipe into the container, and blow out any remaining coolant from the heater assembly. Remove the two connecting bolts, then separate the return pipe. 3. Pull out the right air pipe below the return pipe on the heater assembly. Remove the two bolts on the other side and separate the water supply pipe from the flange joint. Pull out the air pipe below the water supply pipe on the left side of the heater assembly. Remove the water supply pipe's fixing bracket on the left side of the firewall. Loosen the mounting bracket nut under the water supply pipe bracket. 4. Loosen the right mounting bracket nut under the return pipe. Remove the two mounting nuts at the top of the heater assembly. Disconnect the control wire for the blower motor switch. Disconnect the control wire on the main damper flap on the side of the heater assembly. Separate the heater assembly from the mounting studs, then lift it upwards and remove it from the vehicle. 5. Reassemble in the reverse order of disassembly.
