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Camshaft Exhaust Sprocket Replacement > < Crankshaft Rear Oil Seal Replacement - Manual Transmission

Astra J

Camshaft Intake Sprocket Replacement

Special Tool

EN-955-1   Fixing Pin from EN-955   Kit

For equivalent regional tools, refer to Special Tools .

Removal Procedure

1. Open the hood.
2. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .
3. Remove the camshaft cover. Refer to Camshaft Cover Replacement .
4. Remove the 2 camshaft position actuator solenoid valves. Refer to Camshaft Position Actuator Solenoid Valve Removal .
5. Adjust the engine to TDC. Refer to Camshaft Timing Chain Inspection .

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6. Remove the timing chain tensioner plug (1) from the engine front cover.

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7. Install a wrench (1) to the hexagon of the intake camshaft and rotate it in direction of the arrow in order to apply tension to the timing chain and hold.

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8. Install the EN-955-1   pin (2) to the timing chain tensioner bore (1) to secure it in place.
9. Remove the wrench from the intake camshaft.

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10. Remove the 2 upper timing chain guide bolts (1).
11. Remove the upper timing chain guide (2).

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12. Loosen the intake camshaft sprocket bolt (2) while holding the hexagon of the intake camshaft with a wrench (1).
13. Loosen the exhaust camshaft sprocket bolt while holding the hexagon of the exhaust camshaft with a wrench.

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14. Remove the 2 camshaft sprocket bolts (2) and the 2 camshaft position exciter wheels (1).

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15. Remove the 2 camshaft sprockets (2) along with the timing chain (1) and place it in the engine front cover.
16. Remove the intake camshaft sprocket.

Installation Procedure

1. Insert the intake camshaft sprocket to the engine to engine front cover and timing chain.

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2. Install the 2 camshaft sprockets (2) along with the timing chain (1) to the camshafts.

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3. Install the 2 camshaft sprocket bolts (2) and the 2 camshaft position exciter wheels (1).
4. Remove EN-955-1   pin to apply tension to the timing chain.

Note:  Engine must be adjusted to TDC.
5. Tighten the 2 camshaft sprockets. Refer to Camshaft Timing Chain Adjustment .
6. Remove all special tools for timing chain adjustment. Refer to Camshaft Timing Chain Adjustment .

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7. Install the upper timing chain guide (2).

Caution: Refer to Fastener Caution .
8. Install the 2 upper timing chain guide bolts (1) and tighten to 8 N·m (71 lb in) .
9. Install the 2 camshaft position actuator solenoid valves. Refer to Camshaft Position Actuator Solenoid Valve Installation .
10. Install the camshaft cover. Refer to Camshaft Cover Replacement .
11. Install the timing chain tensioner plug and tighten to 50 N·m (37 lb ft) .
12. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .
13. Check and correct engine oil level.
14. Close the hood.

Camshaft Exhaust Sprocket Replacement > < Crankshaft Rear Oil Seal Replacement - Manual Transmission