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Catalytic Converter Brace Bracket Replacement > < Timing Chain Tensioner Replacement

Astra J

Camshaft Timing Chain and Sprocket Replacement

Special Tools

•  EN-955-1   Locking Tool Timing Chain Tensioner
•  EN-956-1   Extension
•  EN-6347   Holder

For equivalent regional tools, refer to Special Tools .

Removal Procedure

1. Remove the oil pump housing. Refer to Oil Pump Housing Replacement .

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2. Tension the timing chain tensioner in direction as shown (arrow).
3. Fix the timing chain tensioner position with EN-955-1   locking tool (1).

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4. Remove the 2 timing chain tensioner bolts (1).
5. Remove the timing chain tensioner (2).

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6. Remove the timing chain tensioner shoe bolt (2).
7. Remove the timing chain tensioner shoe (1).

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8. Remove the 2 timing chain guide bolts (2).
9. Remove the timing chain guide (1).

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10. Install the EN-6347   holder (1) with the EN-956-1   extension (4) to the camshaft sprocket (2).

Note:  Counterhold the camshaft sprocket with EN-6347   holder and EN-956-1   extension .
11. Loosen the camshaft sprocket bolt (3).
12. Remove the EN-6347   holder with the EN-956-1   extension from the camshaft sprocket.

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13. Remove the camshaft sprocket bolt (1).

Note:  Remove the camshaft sprocket (2) from the camshaft at first, then remove the timing chain from the crankshaft sprocket (3).
14. Remove the camshaft sprocket (2) with the timing chain (4).

Installation Procedure


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Note:  Install the timing chain to the crankshaft sprocket (3) at first.
1. Install the camshaft sprocket (2) with the timing chain (4).

Note:  Do not tighten the camshaft sprocket bolt.
2. Install the camshaft sprocket bolt (1).

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3. Install the timing chain guide (1).

Caution: Refer to Fastener Caution .
4. Install the 2 timing chain guide bolts (2) and tighten to 9 N·m (80 lb in) .

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5. Install the timing chain tensioner shoe (1).
6. Install the timing chain tensioner shoe bolt (2) and tighten to 25 N·m (18 lb ft) .

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Note:  Fix the timing chain tensioner position with the EN-955-1   locking tool .
7. Install the timing chain tensioner (2).
8. Install the 2 timing chain tensioner bolts (1) and tighten to 9 N·m (80 lb in) .

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9. Remove the EN-955-1   locking tool (1) from the timing chain tensioner.

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10. Install the EN-6347   holder (1) with the EN-956-1   extension (4) to the camshaft sprocket (2).

Note:  Counterhold the camshaft sprocket with the EN-6347   holder and the EN-956-1   extension .
11. Tighten the camshaft sprocket bolt (3) to 150 N·m (111 lb ft) .
12. Remove the EN-6347   holder with the EN-956-1   extension from the camshaft sprocket.
13. Install the oil pump housing. Refer to Oil Pump Housing Replacement .

Catalytic Converter Brace Bracket Replacement > < Timing Chain Tensioner Replacement