Heater Core Inspection
WARNING: This page is about a different car, the 2004 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
- Remove the A/C unit. See A/C UNIT REMOVAL/INSTALLATION .
- Remove the heater core from the A/C unit.
- Inspect for cracks, damage, and coolant leakage.
- If any problems are found, replace the heater core.
- Inspect for bent fins.
- If any are bent, use a flathead screwdriver to straighten them.
- Verify that the heater core inlet and outlet pipes are not distorted or damaged.
- Repair with pliers if necessary.