Camshaft — Removal and Installation (Opel Omega B2)

Removal

1. Set the piston of cylinder No.1 to TDC by following the steps described in the relevant chapter.

2. Remove the timing chain tensioner 1, having first marked its installation position (see illustration).



3. Heat the bolts 2 of the timing chain guide with a hair dryer, unscrew them and remove the guide (see illustration 6.2). Clean the holes for the damper mounting bolts.

4. Remove the KM-932 device, with which the camshaft was fixed, and also remove the KM-927 thrust pin from the hole on the fuel injection pump drive sprocket (see the relevant chapter).

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5. Remove the drive sprocket from the camshaft by unscrewing the mounting bolt. Hold the camshaft from turning by the Allen key with a second wrench (see illustration).



6. Remove the timing chain from the camshaft sprocket and secure it to the timing case.



7. Mark the mounting position of the camshaft bearing caps before unscrewing their mounting bolts and removing them.

8. Loosen the camshaft bearing cap bolts by turning them half a turn or a full turn in a spiral motion as shown in the illustration. Then remove the bolts in the same sequence.

Caution: If the camshaft needs to be replaced, the valve rocker arms must also be replaced.

9. Clean the sealing surfaces and remove any remaining old sealant.

10. Inspect the camshaft and bearing caps for wear and damage and replace them with new ones if necessary.

Installation

11. Install the valve drive rocker arms in place, using the marks as a guide. The reference marks on the rocker arms in the form of arrows are located on the ends adjacent to the injector rail.

12. Lubricate the mating surfaces of the rocker arms and camshaft with grey molybdenum grease and place the camshaft into the cylinder head.

13. Apply black sealant to the shaded areas indicated by the arrows (see illustration).



14. Install the camshaft bearing caps, observing the markings made before removal, screw in their mounting bolts and tighten the bolts, acting in a spiral pattern (see illustration). First tighten all bolts by half a turn or a full turn, and then, maintaining the specified order, tighten them with a force of 15 Nm.





15. Place the timing chain on the camshaft sprocket and secure the sprocket to the camshaft by screwing in and hand tightening the new mounting bolt.

Attention! The sprocket must fit tightly on the shaft.

16. Install the timing chain guide 1 in place and secure it with new bolts 2 (see illustration). The tightening torque of the damper bolts is 8 Nm.



17. Make sure that arrow 1 on the fuel injection pump drive sprocket is opposite the notch and hole 2 on the fuel injection pump flange (see illustration).



18. Fix the fuel injection pump by inserting the thrust pin 3 KM-927 into the hole in the flange (see illustration 6.17).



19. Install the bearing element 1 of the regulator 4 KM-933 on the camshaft sprocket so that it is positioned strictly vertically (see illustration).



20. Fasten support 4 of the KM-933 regulator to the cylinder head (see illustration 6.19)

21. Fasten handle 2 in the opening of supporting element 1, move it in the direction of the arrow and fix the element in this position with clamping bolt 3 (see illustration 6.19).

22. Tighten the sprocket mounting bolt on the camshaft to 90 Nm, then turn it first by 60° and then by 30°.

23. Fasten the tensioner 4 of the timing chain to the cylinder block and screw on the housing 2, installing a new sealing ring 3 (see illustration). The tightening torque of the housing is 60 Nm.

Attention! Depending on the model, the tensioner may have a detachable pin 1 (see illustration 6.23) or without.

24. Install pin 1 by hammering it in (see illustration 6.23). The finger should snap into place after a clearly audible click.

25. Remove the installed stop bolts and devices.

26. Turn the crankshaft by the vibration damper mounting bolt on the accessory drive belt pulley by two turns (720°) in the direction of engine rotation so that mark 3 on the "TDC cylinder No.1" pulley is positioned at some distance from reference mark 2 on the timing cover (see illustration).



In this position, the cams 1 of the cylinder piston valve drive must be turned upwards (see illustration 6.26).

27. Install the stop pin 1 KM-929 into the hole for the crankshaft position sensor and lock the crankshaft (see illustration). If necessary, turn the crankshaft slightly in the direction of engine rotation to achieve the desired fit of the thrust pin.





In this position of the crankshaft, reference marks 2 should be opposite each other (see illustration 6.27a).



28. Secure the fuel injection pump with the 3 KM-927 thrust pin by inserting it into the hole on the drive sprocket flange (see illustration). Arrow 1 on the fuel injection pump sprocket must coincide with the notch and hole 2 on the flange (see illustration).



29. Fix the camshaft using the device 3 KM-932, securing it on the cylinder head and inserting its stop pin 2 into the hole 1 of the camshaft flange (see illustration).

Attention! If the stop pin 2 of the KM-932 device cannot be inserted into the hole on the flange and the camshaft cannot be fixed in this way, the valve timing adjustment procedure must be repeated in full.