Chevrolet Trax: Cylinder head replacement - Installation Procedure

1. For assembly of the cylinder head. Refer to Cylinder Head Assemble.

CAUTION: Refer to Fastener Caution .

2. Install the cylinder head assembly parts:

• Install the 3 engine lift bracket bolts and tighten to 22 (16 lb ft).
• Install the timing chain tensioner. Refer to Timing Chain Tensioner Installation.
• Install the engine oil pressure indicator switch and tighten to 20 (15 lb ft)
• Install the spark plug. Refer to Spark Plug Replacement .
• Install the hydraulic valve lash adjusters. Refer to Hydraulic Valve Lash Adjuster Installation.
• Install the hydraulic valve lash adjuster arms. Refer to Hydraulic Valve Lash Adjuster Arm Installation.
• Install the exhaust camshaft. Refer to Exhaust Camshaft Installation.
• Install the intake camshaft. Refer to Intake Camshaft Installation.
• Install the EN-953-A fixing tool.

NOTE: Adjust the camshafts by means of the hexagon and a spanner.

3. Clean sealing surfaces of engine front cover and engine block from grease and old gasket material.

Fig. 83: engine front cover gasket

NOTE: The engine front cover gasket comes as a complete unit.

4. Before installation the of the new front cover gasket, bend the top third of the engine front cover gasket (1) back and forth until snaps off at the breaking point.

Fig. 84: Sealing Compound Application Area

5. Apply a 2 mm (0.0787 in) bead of RTV sealant to the areas shown (1).
6. Install a NEW cylinder head gasket. The marking "Top" should point to the cylinder head.

Fig. 85: Engine Front Cover Bolts And Sealing Compound Application Areas

7. Install engine front cover bolts (1) in order to guide the NEW upper engine front cover gasket.
8.  Apply a 2 mm (0.0787 in) bead of RTV sealant to the areas shown (2).

Fig. 86: Timing Chain Tensioner, Guide Pin And Cylinder Head

NOTE: A second mechanic is required.

9. Guide the timing chain guide pin (2) to the timing chain guide and the timing chain tensioner (1) with the installed fixing pin through the timing chain tensioner plug bore in engine front cover.

Fig. 87: Cylinder Head, Gasket, Bolts And Guide Sleeves

10. Install the cylinder head (2).
11. Loosely install 12 NEW cylinder head bolts (1).

Fig. 88: Engine Front Cover Bolts

12. Adjust the cylinder head to the engine front cover. Use a rubber mallet.
13. Position the engine front cover to cylinder head by installing 3 bolts (1).

CAUTION: Refer to Fastener Caution .

14. Tighten the 3 bolts (1) to 8 N.m (71 lb in).

Fig. 89: Cylinder Head Bolts Tightening Sequence

15. Tighten the cylinder head bolts in the sequence as shown and in the following order.

• Tighten the cylinder head bolts to 35 (26 lb ft).
• Tighten the cylinder head bolts an additional 180º. Use EN-470-B wrench.

Fig. 90: Engine Front Cover Bolts

16. Loosen the bolts from engine front cover (1).

Fig. 91: Engine Front Cover Bolts And Water Pump Bolts

17. Install the remaining bolts to engine front cover and water pump.
18. Tighten the engine front cover bolts (1, 2) to 8 N.m (71 lb in).
19. Tighten the water pump bolts (3) to 8 N.m (71 lb in).
20. Install the engine support fixture. Refer to Engine Support Fixture.
21. Remove the engine mount bracket. Refer to Engine Mount Bracket Replacement - Right Side.
22. Install the water pump pulley. Refer to Water Pump Pulley Replacement (LUJ, LUV) .
23. Install the drive belt. Refer to Drive Belt Replacement.
24.  Install engine mount bracket. Refer to Engine Mount Bracket Replacement - Right Side.
25. Install the engine mount. Refer to Engine Mount Replacement - Right Side.
26. Remove the engine support fixture. Refer to Engine Support Fixture.

Fig. 92: Timing Chain And Camshaft Sprockets

27. Install the camshaft sprockets (2) and timing chain (1) as one unit.

Fig. 93: Camshaft Position Exciter Wheels And Camshaft Sprocket Bolts

28. Install the camshaft position exciter wheels (1).
29. Install the NEW camshaft sprocket bolts (2), hand tight only.
30. Install the both camshaft position sensors. Refer to Camshaft Position Sensor Replacement .
31. Remove the EN-955 pin to apply tension to the timing chain.
32. Adjust the camshaft timing chain. Refer to Camshaft Timing Chain Adjustment

Fig. 94: Upper Timing Chain Guide And Bolts

33. Install the upper timing chain guide (2).
34. Install the upper timing chain guide bolts (1) and tighten to 8 N.m (71 lb in).

Fig. 95: Timing Chain Tensioner Plug

35. Install the timing chain tensioner plug and tighten to 50 N.m (37 lb ft).
36.  Install the camshaft position actuator solenoid valve intake and exhaust. Refer to Camshaft Position Actuator Solenoid Valve Replacement .
37. Install the turbocharger. Refer to Turbocharger Replacement.
38. Install the Intake manifold. Refer to Intake Manifold Replacement.
39. Fill coolant fluid. Refer to Cooling System Draining and Filling .
40. Connect battery negative cable. Refer to Battery Negative Cable Disconnection and Connection .
41. Check and correct the engine oil.
42. Test the vehicle using the following procedure:

1. Crank the engine several times. Listen for any unusual noises or evidence that parts are binding.
2. Start the engine and listen for unusual noises.
3. Check the vehicle oil pressure gauge or light and confirm that the engine has acceptable oil pressure.
4. Run the engine speed at about 1,000 RPM until the engine has reached normal operating temperature.
5. Listen for sticking lifter and other unusual noises.
6. Inspect for fuel, oil and/or coolant leaks while the engine is running.

43. Inspect for coolant, oil, gas or exhaust leaks.

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