Chevrolet Trax: Cylinder head installation

Special Tools

EN-470-B Angular Torque Wrench.

For equivalent regional tools, refer to Special Tools.

WARNING: Wear safety glasses when using compressed air in order to prevent eye injury.

1. Clean the sealing surfaces and remove dirt and old gasket material from thread bores, water galleries and oil galleries.

Fig. 399: Cylinder Head, Gasket, Bolts And Guide Sleeves

NOTE: Mind the guide sleeves (4) and (5).

2. Install a NEW cylinder head gasket (3). The marking "Top" should point to the cylinder head.
3. Install the cylinder head (2).
4. Install 12 NEW cylinder head bolts (1) and hand tighten.

Fig. 400: Straight Edge Tool

5. Lay a straight edge (1) against the engine block and cylinder head. Adjust the transition in area (2) until there is no clearance between cylinder head and straight edge, using a rubber mallet.

Fig. 401: Cylinder Head Bolts Tightening Sequence

CAUTION: Refer to Fastener Caution

CAUTION: Refer to Torque-to-Yield Fastener Caution .

6. Tighten the cylinder head bolts in the sequence shown and to the following specifications:

1. Tighten the cylinder head bolts to 35 N.m (26 lb ft).
2. Tighten the cylinder head bolts an additional 180 degrees. Use EN-470-B wrench.

HYDRAULIC VALVE LASH ADJUSTER INSTALLATION

Fig. 402: Hydraulic Valve Lash Adjusters

NOTE: Mind the installation position of the hydraulic valve lash adjusters.

1. Lubricate the hydraulic valve lash adjusters with engine oil.
2. Install the 16 hydraulic valve lash adjusters (1).

HYDRAULIC VALVE LASH ADJUSTER ARM INSTALLATION

Fig. 403: Hydraulic Valve Lash Adjuster Arms

NOTE: Hydraulic valve lash adjuster arms should be installed in their original position.

1. Lubricate the hydraulic valve lash adjuster arms with engine oil.
2. Install the 16 hydraulic valve lash adjuster arms (1).

INTAKE CAMSHAFT INSTALLATION

Fig. 404: Intake Camshaft, Camshaft Bearing Caps And Bolts

NOTE: Mind the markings on the camshaft bearing caps. Camshaft bearing caps should be installed in their original position.

1. Lubricate camshaft and camshaft bearing caps with engine oil.
2. Install the intake camshaft (3).
3. Install the 5 camshaft bearing caps (2).
4. Install the 10 camshaft bearing cap bolts (1) and handtighten

Fig. 405: Intake Camshaft Bearing Cap Bolts Tightening Sequence

CAUTION: Refer to Fastener Caution .

NOTE: Tighten the camshaft bearing cap bolts one turn at a time in order to avoid shape distortion of the camshaft.

5. Tighten the camshaft bearing cap bolts one turn at a time and in a spiral sequence as shown to 8 N.m (71 lb in).

EXHAUST CAMSHAFT INSTALLATION

Fig. 406: Exhaust Camshaft, Camshaft Bearing Caps And Bolts

NOTE: Mind the markings on the camshaft bearing caps. Camshaft bearing caps should be installed in their original position.

1. Lubricate camshaft and camshaft bearing caps with engine oil.
2. Install the exhaust camshaft (3).
3. Install the 5 camshaft bearing caps (2).
4. Install the 10 camshaft bearing cap bolts (1) and handtighten.

Fig. 407: Exhaust Camshaft Bearing Cap Bolts Tightening Sequence

CAUTION: Refer to Fastener Caution .

NOTE: Tighten the camshaft bearing cap bolts one turn at a time in order to avoid shape distortion of the camshaft.

5. Tighten the camshaft bearing cap bolts one turn at a time and in a spiral sequence as shown to 8 N.m (71 lb in).

CAMSHAFT SPROCKET INSTALLATION

Fig. 408: Intake Camshaft Sprocket, Bolt And Intake Camshaft Position Exciter Wheel

1. Install the intake camshaft sprocket (3).
2. Install the intake camshaft position sensor exciter wheel (2) and the intake camshaft sprocket bolt (1), but do not tighten yet.
3. Install the exhaust camshaft sprocket.

NOTE: Tightening of camshaft sprocket bolts will be done after the engine front cover installation.

4. Install the exhaust camshaft position sensor exciter wheel and the exhaust camshaft sprocket bolt, but do not tighten yet.

TIMING CHAIN TENSIONER INSTALLATION

Fig. 409: Timing Chain Tensioner And Bolts

1. Install the timing chain tensioner (2).

CAUTION: Refer to Fastener Caution .

2. Install the 2 timing chain tensioner bolts (1) and tighten to 8 N.m (71 lb in).

ENGINE FRONT COVER GASKET INSTALLATION

1. Clean the sealing surfaces and remove all remains of old sealing compound material.

Fig. 410: Sealing Compound Application Areas

NOTE: The thickness of the sealing bead should be 2 mm (0.0787 in).

2. Apply sealing compound to the shown areas (1) and (2). Refer to Adhesives, Fluids, Lubricants, and Sealers.

Fig. 411: Engine Front Cover Gasket

NOTE: Mind the guide sleeves.

3. Install the NEW engine front cover gasket (1).
4. Install the timing chain. Refer to Camshaft Timing Chain Installation.

NOTE: The complete installation procedure should not take longer than 10 minutes.

5. Install the engine front cover. Refer to Engine Front Cover and Oil Pump Installation.

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