Cobalt L4-2.0L SC VIN P (2005)
Heater Core: Service and Repair
Heater Core Replacement
HEATER CORE REPLACEMENT
TOOLS REQUIRED
SA9111E Hose Clamp Pliers
CAUTION: With a pressurized cooling system, the coolant temperature in the radiator can be considerably higher than the boiling point of
the solution at atmospheric pressure. Removal of the surge tank cap, while the cooling system is hot and under high pressure, causes the
solution to boil instantaneously with explosive force. This will cause the solution to spew out over the engine, the fenders, and the person
removing the cap. Serious bodily injury may result.
REMOVAL PROCEDURE
1. Drain the cooling system. Refer to Draining and Filling Cooling System (2.0L (LSJ)) Draining and Filling Cooling System (2.2L (L61)) in Cooling
System.
2. Raise and support the vehicle. Refer to Vehicle Lifting.
3. Place a drain pan under the water pump drain port.
4. Loosen the water pump drain bolt and drain the coolant from the water pump.
5. Close and tighten the water pump drain bolt.
NOTE: Refer to Fastener Notice in Service Precautions.
Tighten the water pump drain bolt to 10 N.m (88 lb in).
6. Lower the vehicle.
7. Reposition the heater outlet hose clamp at the heater core using SA9111E.
8. Remove the heater outlet hose from the heater core.
