HEATER ASSEMBLY & HEATER CORE
Removal
1. Drain radiator coolant. Place drip pan under heater hoses. Disconnect heater hoses at firewall. Disconnect heater valve cable from heater valve.

2. Remove instrument panel. Remove heater duct. Remove instrument panel support bracket. Disconnect control cables from heater.

3. Remove heater assembly nuts. Disconnect wiring harness from heater assembly. Pull heater assembly away from body, and remove heater assembly. Remove heater core cover screws, and remove heater core.

Installation
To install, reverse removal procedure. Apply sealant to grommets.
DO NOT interchange inlet and outlet heater hoses. Secure hose clamps. Loosen radiator bleed bolt. Fill radiator and reservoir tank with coolant. Tighten bleed bolt after trapped air has escaped. Adjust cables as necessary.

Answered by KHLow2008 (expert)
39,806 answers provided