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: Service and Repair

Heater Case Assembly:






1. Disconnect battery ground cable and drain cooling system.
2. Disconnect heater hoses.
3. Remove instrument panel and instrument panel center support.
4. Disconnect all electrical connections and mode and temperature control cables from heater unit, Fig. 10.
5. Remove defroster and speedometer cable retaining bracket from heater unit.
6. Disconnect fastener bolts, grommets and floor duct from heater case.
7. Remove heater unit.
8. Remove heater core from heater unit.
9. Reverse procedure to install.