Heater Core: Testing and Inspection

HEATER CORE INSPECTION

1. Remove the heater unit.
2. Remove the heater core from the heater unit.
3. Check for cracks, damage, and coolant leakage. If any problems are found, replace the heater core.
4. Check for bent tins. It any are bent, use a flathead screwdriver to straighten them.
5. Verify that the heater core inlet and outlet are not distorted or damaged. Repair with pliers if necessary.