Astra L4-1.8L (2009)
Thermostat Housing: Service and Repair
Engine Coolant Thermostat Housing Replacement
Special Tools
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MK-6340 Locking Tool
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MK-6628 Locking Tool
Removal Procedure
1. Remove the camshaft sensor of exhaust camshaft.
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Disconnect the wiring harness connector.
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Remove the bolt.
2. Remove the camshaft sensor of intake camshaft.
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Disconnect the wiring harness connector.
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Remove the bolt.
3. Remove the camshaft adjustment valve, exhaust camshaft.
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Disconnect the wiring harness connector.
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Disconnect the wiring harness from the cylinder head.
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Remove the bolt.
4. Remove the camshaft adjustment valve, intake camshaft.
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Disconnect the wiring harness connector.
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Remove the bolt.
5. Remove the closure bolt, exhaust camshaft adjuster.
6. Remove the intake camshaft closure bolt.
7. Install the MK-6340 .
Note: Two mechanics required.
8. Slacken the exhaust camshaft adjuster.
Counterhold at the camshaft hexagon.
9. Detach the exhaust camshaft adjuster.
Remove the bolt.
Note: Two mechanics required.
10. Slacken the intake camshaft adjuster.
Counterhold at the camshaft hexagon.
11. Detach the intake camshaft adjuster.
Remove the bolt.
12. Remove the rear toothed belt cover.
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Unclip the wiring trough cover.
*
Remove the 4 bolts.
13. Remove the thermostat housing.
Remove the 4 bolts.
Installation Procedure
Caution: Refer to Fastener Caution (See: Service Precautions/Vehicle Damage Warnings/Fastener Caution).
1. Attach the thermostat housing.
Use a new gasket.
Tighten the 4 bolts to 8 Nm (70 lb in).
