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What is the torque sequence of a Opel corsa 1.7 utility cylinderead?

The torque sequence for an Opel Corsa 1.7 utility cylinder head is as follows:

Step 1: Cylinder Head Bolts

- Tighten the cylinder head bolts in the following sequence to 20 Nm (15 lb-ft):

1. Bolt 1

2. Bolt 2

3. Bolt 3

4. Bolt 4

5. Bolt 5

6. Bolt 6

7. Bolt 7

8. Bolt 8

Step 2: Re-tighten Cylinder Head Bolts

- Re-tighten the cylinder head bolts in the same sequence to 40 Nm (30 lb-ft).

Step 3: Camshaft Sprocket Bolt

- Tighten the camshaft sprocket bolt to 50 Nm (37 lb-ft).

Step 4: Intake Manifold Bolts

- Tighten the intake manifold bolts to 12 Nm (9 lb-ft).

Step 5: Exhaust Manifold Bolts

- Tighten the exhaust manifold bolts to 25 Nm (18 lb-ft).

Step 6: Rocker Arm Assembly

- Tighten the rocker arm assembly bolts to 20 Nm (15 lb-ft).

Step 7: Fuel Injector Hold-Down Bolts

- Tighten the fuel injector hold-down bolts to 10 Nm (7 lb-ft).

Step 8: Timing Belt Tension

- Check and adjust the timing belt tension to 90 Hz.

Step 9: Spark Plugs

- Tighten the spark plugs to 25 Nm (18 lb-ft).