Astra L4-1.8L (2009)
Heater Core: Service and Repair
Heater Core Replacement
Removal Procedure
Note: Depressurize cooling system by opening and re-closing closure cap on coolant compensation tank.
1. Drain the coolant.
Collect the coolant in a drip pan.
2. Remove the blower module drain hose (1).
Remove the 2 bolts.
Note: Mark the coolant hose (3) and connection (2) before removal to avoid confusion when refitting.
3. Disconnect the 2 coolant hoses.
Release the 2 quick-release fittings.
