Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSPONTIAC1987FIREBIRD V8-350 5.7LREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGHEATER CORESERVICE AND REPAIR
1987 Pontiac Firebird V8-350 5.7L
Heater Core: Service and Repair
1987 Pontiac Firebird V8-350 5.7LSECTION Service and Repair
REMOVE OR DISCONNECT
1. Battery ground cable.
2. Drain cooling system.
3. Heater inlet and outlet hoses from heater core.
4. Right lower sound absorber panel.
5. ECM attaching screw and move aside.
6. Right lower I.P. trim panel.
7. Lower right I.P. carrier-to-cowl screw.
8. Four (4) heater case cover screws. Upper left screw may be reached with a long socket extension through the l.P. openings exposed by removal of the lower right I.P. trim panel. Carefully lift the lower right comer of the I.P. to align socket extension.
9. Heater case cover.
10. Core support plate and baffle screws.
11. Heater core, support plate and baffle from case.
INSTALL OR CONNECT
1. Heater core, support plate and baffle to case.
2. Core support plate and baffle screws.
3. Heater case cover.
4. Four (4) heater case cover screws.
5. Lower right I.P. carrier-to-cowl screw.
6. Right lower I.P. trim panel.
7. ECM.
8. Right lower sound absorber panel.
9. Heater inlet and outlet hoses to heater core.
10. Refill cooling system and check for leaks.
11. Battery ground cable.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.