Millenia S V6-2.3L DOHC (Miller cycle) (2000)
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Heater Core: Testing and Inspection
1. Disassemble the heater unit.
2. Inspect for cracks, damage, and coolant leakage.
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If any problems are found, replace the heater core.
3. Inspect for bent fins.
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If any are bent, use a flathead screwdriver to straighten them.
4. Verify that the heater core inlet and outlet are not distorted or damaged.
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If they are distorted or damaged, repair them using pliers.
