Sequence of execution
Note: The operation is shown using the example of replacing a 1.6 DOHC engine. Differences in performing the operation on other engines are indicated in the text.
1. Prepare the car for work (see "Preparing the car for maintenance and repair").
2. Remove the timing belt, timing belt tensioner and guide rollers (see "Timing Belt - Tensioner Replacement", "Timing Belt - Checking Condition, Adjusting Tension and Replacing").
3. Unscrew the camshaft position sensor mounting bolts (see "Camshaft Position Sensor - Replacement") and, without disconnecting the block of the harness of its wires, we move it to the side.
4. Remove the crankshaft gear.
5. Remove the cylinder head cover (see "Cylinder head cover for 1.4 and 1.6 DOHC engines - removal, gasket replacement and installation" or "1.8 DOHC Engine Cylinder Head Cover - Removal, Gasket Replacement and Installation").
6. On 1.4 and 1.6 DOHC engines, disconnect the coolant temperature sensor wiring harness holder from the rear cover.
7. Holding the camshaft from turning with a 24 mm wrench, use a TORX E14 wrench to unscrew the bolt securing its pulley.
8. Remove the pulley by sliding it along the camshaft flange.
9. Remove the second camshaft pulley in a similar manner.
10. Using a TORX T30 key, unscrew the two upper bolts securing the rear cover.
Material taken from an internet portal [www.OPELBOOK.ru]
11. Remove the crankshaft pulley (see "Front Crankshaft Oil Seal - Replacement").
12. Using the same key, unscrew the two lower bolts securing the rear timing belt cover.
13. Remove the rear timing belt cover.
14. Using a slotted screwdriver, remove the oil seal.
15. Lubricate the working edge of the new seal with engine oil and press it in using a 48 mm diameter mandrel.
16. Replace the second camshaft oil seal in a similar manner.
17. Install the remaining parts in reverse order.
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