Timing Chain, Sprockets, Tensioner Installation Opel GT II

Camshaft Timing Chain, Sprocket, and Tensioner Installation

Tools Required

1. Ensure the intake camshaft notch is in the 5 o'clock position (2) and the exhaust camshaft notch is in the 7 o'clock position (1). The number 1 piston should be at top dead center (TDC), crankshaft key at 12 o'clock.
2. Install the timing chain drive sprocket to the crankshaft with the timing mark in the 5 o'clock position and the front of the sprocket facing out.
3. Assemble the intake camshaft actuator into the timing chain with the timing mark lined up with the uniquely colored link (1).
4. Lower the timing chain through the opening in the cylinder head. Use care to ensure that the chain goes around both sides of the cylinder block bosses (1, 2).
5. Install the intake camshaft actuator onto the intake camshaft while aligning the dowel pin into the camshaft slot.
6. Hand tighten the new intake camshaft actuator bolt.
7. Route the timing chain around the crankshaft sprocket and line up the first matching colored link (2) with the timing mark on the crankshaft sprocket, in approximately the 5 o'clock position.
8. Rotate the crankshaft clockwise to remove all chain slack. Do not rotate the intake camshaft.
9. Install the adjustable timing chain guide down through the opening in the cylinder head and install the adjustable timing chain bolt.
10. Install the exhaust camshaft actuator into the timing chain with the timing mark lined up with the second matching colored link.
11. Install the exhaust camshaft actuator onto the exhaust camshaft, aligning the dowel pin into the camshaft slot.
12. Using a 23 mm open end wrench, rotate the exhaust camshaft approximately 45 degrees until the dowel pin in the camshaft actuator goes into the camshaft slot.
13. When the actuator seats on the cam, tighten the new exhaust camshaft actuator bolt hand tight.
14. Verify that all of the colored links and the appropriate timing marks are still aligned. If they are not, repeat the portion of the procedure necessary to align the timing marks.
15. Install the fixed timing chain guide and bolts.
16. Install the upper timing chain guide and bolts.
17. Reset the timing chain tensioner by performing the following steps:
18. Inspect the timing chain tensioner seal for damage. If damaged, replace the seal.
19. Inspect to ensure all dirt and debris is removed from the timing chain tensioner threaded hole in the cylinder head.
20. Install the timing chain tensioner assembly.
21. The timing chain tensioner is released by compressing it 2 mm (0.079 in), which will release the locking mechanism in the ratchet. To release the timing chain tensioner, use a suitable tool with a rubber tip on the end. Feed the tool down through the cam drive chest to rest on the cam chain. Then give a sharp jolt diagonally downwards to release the tensioner.
22. Using a 23 mm wrench, engage the hex on the intake camshaft, and using a torque wrench, tighten the camshaft actuator bolt.
23. Using a 23 mm wrench, engage the hex on the exhaust camshaft, and using a torque wrench, tighten the camshaft actuator bolt.
24. Install the timing chain oiling nozzle.
25. Apply sealant compound GM P/N 12345382 (Canadian P/N 10953489) to the thread of the timing chain guide bolt access hole plug.
26. Install the timing chain guide bolt access hole plug.