Safety Warning
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HOMESERVICE MANUALSCHEVROLET2001MONTE CARLO V6-3.8L VIN KREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGHEATER CORESERVICE AND REPAIR
2001 Chevrolet Monte Carlo V6-3.8L VIN K
Heater Core: Service and Repair
2001 Chevrolet Monte Carlo V6-3.8L VIN KSECTION Service and Repair
HEATER CORE REPLACEMENT
REMOVAL PROCEDURE
1. Remove the air cleaner assembly.
2. Remove the fuel injector sight shield if equipped.
3. Drain the coolant. Refer to Draining and Filling Cooling System in Cooling System.
4. Disconnect the heater hoses at the heater core.
5. Remove the left and right instrument panel insulators.
6. Remove the lower the floor console, if equipped.
7. Remove the bolts and position the HVAC wiring harness bracket aside.
IMPORTANT: Position the heater outlet cover downward and rearward in order to disconnect the cover from the rear area floor duct assembly.
8. Remove the heater outlet cover screws.
9. Remove the heater outlet cover.
10. Remove the heater core cover screws.
11. Remove the heater core cover.
12. Remove and discard the seals (1, 2, 3) from the heater core cover.
13. Remove and discard the heater core outer seal from the heater core.
14. Remove the heater core pipe retainer clamp screw (2).
15. Remove the heater core line clamp screw (1).
16. Remove the heater core retaining clamp.
17. Remove the heater core from the HVAC lower case.
18. Remove the heater core tube support bracket (clamp).
19. Remove and discard the heater core lower seal (4) from the HVAC case.
20. Remove and discard the heater core center seal (3) from the HVAC case.
21. Remove and discard the heater core upper seal (2) from the HVAC lower case.
22. Remove and discard the heater core side seals (1) from the HVAC lower case.
INSTALLATION PROCEDURE
1. Install the heater core side seals (1) to the HVAC lower case.
2. Install the heater core upper seal (2) to the HVAC lower case.
3. Install the heater core center seal (3) to the HVAC case.
4. Install the heater core lower seal (4) to the HVAC case.
5. Install the heater core tube support bracket (clamp).
6. Install the heater core from the HVAC lower case.
NOTE: Refer to Fastener Notice in Service Precautions.
7. Install the heater core line clamp screw (2).
Tighten
Tighten the heater core line clamp screw to 1.5 N.m (13 lb in).
8. Install the heater core mounting clip with a screw (1).
Tighten
Tighten the heater core mounting clip screw to 1.5 N.m (13 lb in).
9. Install heater core outer seal (5) to the heater core.
10. Install new seals (1,2,3) to the heater core cover.
11. Install the heater core cover.
12. Install the heater core cover screws.
Tighten
Tighten the heater core cover screws to 1.5 N.m (13 lb in).
13. Install the heater core outlet cover.
14. Install the heater core outlet cover screws.
Tighten
Tighten the heater core outlet cover screws to 1.5 N.m (13 lb in).
15. Install the HVAC wiring harness bracket. Install the HVAC wiring harness bracket bolts.
Tighten
Tighten the HVAC wiring harness bracket bolts to 10 N.m (89 lb in).
16. Install the lower the floor console, if equipped.
17. Install the left and right instrument panel insulators.
18. Connect the heater hoses at the heater core.
19. Refill the coolant. Refer to Draining and Filling Cooling System in Cooling System.
20. Install the fuel injector sight shield if equipped.
21. Install the air cleaner assembly.
REMOVAL PROCEDURE
1. Remove the air cleaner assembly.
2. Remove the fuel injector sight shield if equipped.
3. Drain the coolant. Refer to Draining and Filling Cooling System in Cooling System.
4. Disconnect the heater hoses at the heater core.
5. Remove the left and right instrument panel insulators.
6. Remove the lower the floor console, if equipped.
7. Remove the bolts and position the HVAC wiring harness bracket aside.
IMPORTANT: Position the heater outlet cover downward and rearward in order to disconnect the cover from the rear area floor duct assembly.
8. Remove the heater outlet cover screws.
9. Remove the heater outlet cover.
10. Remove the heater core cover screws.
11. Remove the heater core cover.
12. Remove and discard the seals (1, 2, 3) from the heater core cover.
13. Remove and discard the heater core outer seal from the heater core.
14. Remove the heater core pipe retainer clamp screw (2).
15. Remove the heater core line clamp screw (1).
16. Remove the heater core retaining clamp.
17. Remove the heater core from the HVAC lower case.
18. Remove the heater core tube support bracket (clamp).
19. Remove and discard the heater core lower seal (4) from the HVAC case.
20. Remove and discard the heater core center seal (3) from the HVAC case.
21. Remove and discard the heater core upper seal (2) from the HVAC lower case.
22. Remove and discard the heater core side seals (1) from the HVAC lower case.
INSTALLATION PROCEDURE
1. Install the heater core side seals (1) to the HVAC lower case.
2. Install the heater core upper seal (2) to the HVAC lower case.
3. Install the heater core center seal (3) to the HVAC case.
4. Install the heater core lower seal (4) to the HVAC case.
5. Install the heater core tube support bracket (clamp).
6. Install the heater core from the HVAC lower case.
NOTE: Refer to Fastener Notice in Service Precautions.
7. Install the heater core line clamp screw (2).
Tighten
Tighten the heater core line clamp screw to 1.5 N.m (13 lb in).
8. Install the heater core mounting clip with a screw (1).
Tighten
Tighten the heater core mounting clip screw to 1.5 N.m (13 lb in).
9. Install heater core outer seal (5) to the heater core.
10. Install new seals (1,2,3) to the heater core cover.
11. Install the heater core cover.
12. Install the heater core cover screws.
Tighten
Tighten the heater core cover screws to 1.5 N.m (13 lb in).
13. Install the heater core outlet cover.
14. Install the heater core outlet cover screws.
Tighten
Tighten the heater core outlet cover screws to 1.5 N.m (13 lb in).
15. Install the HVAC wiring harness bracket. Install the HVAC wiring harness bracket bolts.
Tighten
Tighten the HVAC wiring harness bracket bolts to 10 N.m (89 lb in).
16. Install the lower the floor console, if equipped.
17. Install the left and right instrument panel insulators.
18. Connect the heater hoses at the heater core.
19. Refill the coolant. Refer to Draining and Filling Cooling System in Cooling System.
20. Install the fuel injector sight shield if equipped.
21. Install the air cleaner assembly.
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.