Gas distribution belt (Opel Omega B)

Timing Belt Adjustment Tools



To adjust the timing belt, you will need the following special tools: camshaft sprocket locking tools (KM-800-1 and KM-800-2), a tool for locking the crankshaft sprocket (KM 800-10), a wedge for the timing belt (KM-800-30) and a tool for synchronizing the camshaft sprockets (KM-800-20).

Removal

1. Disconnect the negative battery cable and set piston N1 to TDC.

2. Remove the crankshaft pulley.

3. Check if the synchronization marks are aligned correctly.



4. Install the KM-800-10 tool on the crankshaft sprocket and lock the shaft.



5. Lock the camshafts, tool KM-800-1 (marking 1 and 2, red handle) is designed for the shafts of the right cylinder head, and the KM-800-2 tool (marking 3 and 4, green handle) for left head shafts. Clamp the tool lever on the water pump flange.







6. Install the camshaft sprocket locking tool (drawing on the left). The TOR marks should be facing upwards (drawing on the right).



7. Loosen the timing belt tensioner pulley nut.



8. Turn the tensioner pulley clockwise until it stops and tighten the nut.







9. Loosen the top bolts (drawing on the left) and lower (drawing on the right) timing belt guide pulleys.

10. Remove the timing belt. If you did not use special tools, turn the crankshaft approximately 60° back before removing the belt. This reduces the likelihood of the valves touching the pistons.

11. Carefully inspect the belt for wear and damage and replace it if necessary.

Installation

Adjusting the tensioner pulley

Warning! There are two types of belts and two types of tensioners that are installed on the engines described. The type of tensioner determines the type of belt. Modified tensioners are installed on engine models produced in 1997 and later and are marked E on the pulley. Regular tensioners are installed on engine models produced before 1997 and are marked D. If you have difficulty determining the type of tensioner, consult a specialist.

1. Clean the shaft sprockets and pulleys thoroughly.





2. Align the timing marks of the camshaft sprockets of the right cylinder head (1 and 2) (drawing on the left) and left (drawing on the right) with the slots in the rear timing belt cover and re-align them if you have turned the crankshaft 60°.





3. Align the crankshaft sprocket mark with the slot in the oil pump housing (indicated by arrows).



4. Place the belt on the sprockets. The arrows on the belt should point in the direction of belt rotation, and the double line on the belt should match the timing mark on the crankshaft sprocket.



5. Lock the timing belt with a wedge.





6. In engines equipped with a conventional tensioner, the belt must first be placed on the lower guide pulley and on the camshaft sprockets of the left cylinder head. Mark (indicated by the arrow) on the tensioner pulley bracket will help determine the tensioner type.



7. On engines equipped with a modified tensioner, the belt must first be placed on the tensioner pulley.



8. Then the belt must be placed on the camshaft sprockets of the right cylinder head.





9. Pass the belt over the lower idler pulley.



10. Loosen the lower idler pulley bolt. Turn the pulley counterclockwise to tighten the left side of the belt. Check that the timing marks are still aligned.



11. Tighten the pulley bolt.



12. Loosen the upper idler pulley bolt. Turn the pulley counterclockwise to tighten the upper portion of the belt. Check that the timing marks are still aligned. Tighten the pulley bolt.





13. Loosen the tensioner pulley nut and turn the pulley lever counterclockwise so that the distance between the plate and the stop is 0.5–1.5 mm (indicated by the arrow). Tighten the nut.

14. Remove all locking tools and rotate the crankshaft two full revolutions.

15. Check that the sync marks are still aligned.

16. Loosen the tensioner nut and install the tensioner lever as shown in the figure (see figure Adjusting the tensioner pulley). The mark (A) should be 3-4 mm higher than the stop mark (B). Tighten the nut.

17. Rotate the crankshaft two full revolutions. Check that the timing marks are still aligned. Adjust if necessary.