Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Heater Core: Testing and Inspection

HEATER CORE INSPECTION

1. Disassemble the heater unit.
2. Check for cracks, damage, and coolant leakage. Repair or replace the heater core if necessary.
3. Check for bent fins. If they are bent, use a flathead screwdriver to straighten them.




4. Verify that the heater core inlet and outlet are not distorted or damaged. Repair with pliers if necessary.