Chevrolet Trax: Camshaft timing chain removal

Special Tools

• EN-952 Fixing Pin
• EN-953-A Fixing Tool
• EN-955-10 Fixing Pin from EN-955 Kit

For equivalent regional tools, refer to Special Tools.

1. The engine should be adjusted to TDC.
2. The crankshaft should be fixed with EN-952 fixing pin.
3. The camshaft should be fixed with EN-953-A fixing tool.

Fig. 294: Timing Chain And Timing Chain Tensioner

4. Push the timing chain (2) in direction to the timing chain tensioner (1) and fix the tensioner with EN-955- 10 fixing pin (3).

Fig. 295: Upper Timing Chain Guide And Bolts

5. Remove the 2 upper timing chain guide bolts (1).
6. Remove the upper timing chain guide (2).

Fig. 296: Timing Chain Guide Right Side

7. Remove the 2 timing chain guide right side bolts (2).
8. Remove the timing chain guide right side (1).

Fig. 297: Timing Chain Tensioner Shoe And Bolt

9. Remove the timing chain tensioner shoe bolt (2).
10. Remove the timing chain tensioner shoe (1).

Fig. 298: Timing Chain And Crankshaft Sprocket

11. Remove the timing chain (1) in compound with the crankshaft sprocket (2).

TIMING CHAIN TENSIONER REMOVAL

Fig. 299: Timing Chain Tensioner And Bolts

1. Remove the 2 timing chain tensioner bolts (1).
2. Remove the timing chain tensioner (2).

ENGINE FRONT COVER GASKET REMOVAL

Fig. 300: Engine Front Cover Gasket

Remove and DISCARD the engine front cover gasket (1).

CAMSHAFT SPROCKET REMOVAL

Fig. 301: Intake Camshaft And Intake Camshaft Sprocket Bolt

1. Loosen the intake camshaft sprocket bolt (1) while holding the hexagon of intake camshaft (2) with a wrench.

Fig. 302: Intake Camshaft Sprocket, Bolt And Intake Camshaft Position Exciter Wheel

2. Remove the intake camshaft sprocket bolt (1) and the intake camshaft position exciter wheel (2).
3. Remove the intake camshaft sprocket (3).
4. Loosen the exhaust camshaft sprocket bolt while holding the hexagon of exhaust camshaft with a wrench.
5. Remove the exhaust camshaft sprocket bolt and the exhaust camshaft position exciter wheel.
6. Remove the exhaust camshaft sprocket.

INTAKE CAMSHAFT REMOVAL

Fig. 303: Intake Camshaft Bearing Cap Bolts Removal Sequence

1. Remove the camshaft bearing cap bolts in a spiral sequence as shown one turn at a time until there is no spring tension pushing on the camshaft.

Fig. 304: Intake Camshaft, Camshaft Bearing Caps And Bolts

NOTE: Mind the markings on the camshaft bearing caps to ensure they will be installed in the same position.

2. Remove the 10 camshaft bearing cap bolts (1).
3. Remove the 5 camshaft bearing caps (2).
4. Remove the intake camshaft (3).

EXHAUST CAMSHAFT REMOVAL

Fig. 305: Exhaust Camshaft Bearing Cap Bolts Removal Sequence

1. Remove the camshaft bearing cap bolts in a spiral sequence as shown one turn at a time until there is no spring tension pushing on the camshaft.

Fig. 306: Exhaust Camshaft, Camshaft Bearing Caps And Bolts

NOTE: Mind the markings on the camshaft bearing caps to ensure they will be installed in the same position.

2. Remove the 10 camshaft bearing cap bolts (1).
3. Remove the 5 camshaft bearing caps (2).
4. Remove the exhaust camshaft (3).

HYDRAULIC VALVE LASH ADJUSTER ARM REMOVAL

Fig. 307: Hydraulic Valve Lash Adjuster Arms

NOTE: Mind the installation position of the hydraulic valve lash adjuster arms.

Remove the 16 hydraulic valve lash adjuster arms (1).

HYDRAULIC VALVE LASH ADJUSTER REMOVAL

Fig. 308: Hydraulic Valve Lash Adjusters

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

Remove the 16 hydraulic valve lash adjusters (1).

CYLINDER HEAD REMOVAL

Fig. 309: Cylinder Head Bolts Loosening Sequence

1. Loosen the 12 cylinder head bolts in the sequence as shown. Use the following procedure:

1. Loosen the cylinder head bolts 90 degrees.
2. Loosen the cylinder head bolts 180 degrees.

Fig. 310: Cylinder Head, Gasket, Bolts And Guide Sleeves

NOTE: Do not damage the guide sleeves (4) and (5).

2. Remove the 12 cylinder head bolts (1).
3. Remove the cylinder head (2).
4. Remove the cylinder head gasket (3).

PISTON, CONNECTING ROD, AND BEARING REMOVAL

Fig. 311: Rod Bearing Caps And Bolts

NOTE: Mark the installation position of the connecting rod bearing caps. The connecting rod bearings and bearing caps must not be interchanged with other connecting rods.

1. Remove the 4 connecting rod bearing cap bolts (1) of cylinder 2 and 3.
2. Remove the 2 connecting rod bearing caps (2) and the 2 connecting rod bearings of cylinder 2 and 3.
3. Rotate the crankshaft 180 degrees.

Fig. 312: Rod Bearing Caps And Bolts

4. Remove the 4 connecting rod bearing cap bolts (1) of cylinder 1 and 4.
5. Remove the 2 connecting rod bearing caps (2) and the 2 connecting rod bearings of cylinder 1 and 4.

Fig. 313: Pistons, Connecting Rods And Bearings

6. Remove the 4 pistons (1) and connecting rods (2) and the 4 upper connecting rod bearings (3) from the cylinder block.

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