Chevrolet Trax: Engine front cover with oil pump replacement

Removal Procedure

1. Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection .
2. Set the engine to TDC. Refer to Camshaft Timing Chain Inspection.
3. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
4. Remove the front wheelhouse liner, right side. Refer to Front Wheelhouse Liner Replacement (Trax) , Front Wheelhouse Liner Replacement (Encore) .
5. Remove the air conditioning compressor. Refer to Air Conditioning Compressor Replacement (LUJ, LUV) .
6. Remove the air conditioning compressor bracket. Refer to Air Conditioning Compressor Bracket Removal.
7. Remove the crankshaft balancer. Refer to Crankshaft Balancer Replacement.
8. Remove the oil pan. Refer to Oil Pan Replacement.
9. Lower vehicle.
10. Remove the drive belt tensioner. Refer to Drive Belt Tensioner Replacement.
11. Remove the generator from above. Refer to Generator Replacement (LUV) .
12. Remove the water pump pulley and the water pump. Refer to Water Pump Replacement (LUJ, LUV) .
13. Remove the camshaft position actuator solenoid valves. Refer to Camshaft Position Actuator Solenoid Valve Removal.
14. Loosen the camshaft sprocket bolts until the camshaft position exciter wheels are free to rotate. Refer to Camshaft Timing Chain Adjustment.

Fig. 126: M6, M10 Front Cover Bolts And Engine Front Cover

15. Remove the 13 engine front cover bolts M6 (1).
16. Remove the 2 engine front cover bolts M10 (2).
17. Remove the engine front cover (3).

NOTE: Removal of timing chain is necessary to get access to engine front cover gasket.

18. Remove the camshaft timing chain. Refer to Camshaft Timing Chain Replacement

Fig. 127: Engine Front Cover Gasket

19. Remove the engine front cover gasket (1).
20. Remove the intake and exhaust camshaft position sensors from the engine front cover. Refer to Camshaft Position Sensor Replacement

Installation Procedure

1. Install the intake and exhaust camshaft position sensors to the engine front cover. Refer to Camshaft Position Sensor Replacement .
2. Clean the engine front cover sealing surfaces on engine block and cylinder head.

Fig. 128: Sealing Compound Application Areas

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

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

Fig. 129: Engine Front Cover Gasket

NOTE: Mind the guide sleeves.

4. Install a NEW engine front cover gasket (1).
5. Install the timing chain. Refer to Camshaft Timing Chain Replacement.

Fig. 130: M6, M10 Front Cover Bolts And Engine Front Cover

NOTE: Mind the guide sleeves when installing the engine front cover. The complete installation procedure of the engine front cover should not take longer than 10 minutes.

6. Install the engine front cover (3).
7. Install the 13 engine front cover bolts M6 (1).
8. Install the 2 engine front cover bolts M10 (2).

CAUTION: Refer to Fastener Caution .

9. Tighten the 13 engine front cover bolts M6 to 8 N.m (71 lb in).
10. Tighten the 2 engine front cover bolts M10 to 35 N.m (26 lb ft).

NOTE: Engine should be adjusted and fixed in TDC position.

11. Tighten the camshaft sprockets, install the upper timing chain guide and remove all special tools. Refer to Camshaft Timing Chain Adjustment.
12.  Install the 2 camshaft position actuator solenoid valves. Refer to Camshaft Position Actuator Solenoid Valve Replacement .
13.  Install the water pump and the water pump pulley. Refer to Water Pump Replacement (LUJ, LUV) .
14. Install the generator from above. Refer to Generator Replacement (LUV) .
15. Install the drive belt tensioner. Refer to Drive Belt Tensioner Replacement.
16. Install the air conditioning compressor bracket. Refer to Air Conditioning Compressor Bracket Installation.
17. Install the air conditioning compressor. Refer to Air Conditioning Compressor Replacement (LUJ, LUV) .
18. Install the crankshaft balancer. Refer to Crankshaft Balancer Replacement.
19. Install the drive belt. Refer to Drive Belt Replacement.
20.  Install the engine mount bracket. Refer to Engine Mount Bracket Replacement - Right Side.
21. Install the engine mount. Refer to Engine Mount Replacement - Right Side.
22. Install the camshaft cover. Refer to Camshaft Cover Replacement.
23. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .
24. Raise the vehicle.
25. Install the oil pan. Refer to Oil Pan Replacement.
26. Install the front wheelhouse liner, right side. Refer to Front Wheelhouse Liner Replacement (Trax) , Front Wheelhouse Liner Replacement (Encore) .
27. Lower the vehicle.
28. Connect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection .
29. Fill up engine oil. Refer to Engine Oil and Oil Filter Replacement.

OIL PUMP REPLACEMENT

Removal Procedure

1. Remove the engine front cover. Refer to Engine Front Cover with Oil Pump Replacement.

Fig. 131: Engine Oil Pump Cover And Bolts

2. Remove the 8 oil pump cover bolts (1).
3. Remove the oil pump cover (2).

Fig. 132: Oil Pump Slide Spring Windings And Engine Front Cover Edge

WARNING: Before removing the spring, cover the spring with a towel to prevent the spring from flying and possibly causing damage or personal injury.

NOTE: Insert the screw driver between the oil pump slide spring windings (2).

4. Protect the engine front cover edge (1) with a suitable piece of plastic.
5. Compress the oil pump slide spring with a screw driver and remove the oil pump slide spring in conjunction with the oil pump slide spring pin.

Fig. 133: Locating Engine Oil Pump Components

NOTE: Keep the oil pump components in order to aid in installation.

6. Remove the oil pump components in the following order:

1. Outer oil pump vane ring (1).
2. Oil pump vane rotor (3) and the 7 oil pump vanes (2).
3. Inner oil pump vane ring (6).
4. Oil pump slide (4) and the 2 oil pump slide seals with the 2 oil pump slide seal springs (5).
5. For cleaning and inspection the oil pump. Refer to Engine Front Cover and Oil Pump Cleaning and Inspection.

Installation Procedure

Fig. 134: Oil Pump Components

NOTE: Oil pump slide spring pin, oil pump slide spring and slide seal and slide seal spring can be ordered as single parts. All other oil pump components can only be ordered as a replacement kit.

1. Install the oil pump components in the following order:

NOTE: The bore (8) in the oil pump slide must fit smooth-running and without clearance to the oil pump slide pivot pin (7).

1. Install the oil pump slide (6).
2. Install the inner oil pump vane ring (5).

NOTE: Ensure the mark (9) of the oil pump vane rotor (4) points to the oil pump cover.

3. Install the oil pump vane rotor (4).

NOTE: Ensure the flats (3) on the oil pump vanes (2) point to the oil pump vane rotor.

4. Install the 7 oil pump vanes (2).
5. Install the outer oil pump vane ring (1).

Fig. 135: Oil Pump Slide Seal Springs And Grooves

2. Install the 2 oil pump slide seals and the 2 oil pump slide seal springs (2) in the position as shown to the 2 grooves (1) of the oil pump slide.

Fig. 136: Oil Pump Slide Spring, Pin, Chambers And Front Cover Edge

3. Protect the engine front cover edge (5) with a suitable piece of plastic.

NOTE: The length of the removed oil pump slide spring (2) should be 76.5 mm (3.0118 in) for naturally aspirated engines and 61 mm (2.4016 in) for turbo engines.

4. Install the oil pump slide spring pin (1) in conjunction with the oil pump slide spring (4). Use a screwdriver to compress the oil pump slide spring. The flat side of oil pump slide spring pin must face upwards.
5. Lubricate the oil pump vanes, the oil pump vane rotor, the oil pump slide spring and the chambers (3) with engine oil.
6. Inspect the oil pump slide spring mechanism for proper function.

Fig. 137: Engine Oil Pump Cover And Bolts

7. Install the oil pump cover (2) and the 8 oil pump cover bolts (1).

Fig. 138: Oil Pump Cover Bolts Tightening Sequence

CAUTION: Refer to Fastener Caution

8. Tighten the oil pump cover bolts in a sequence as shown to 8 N.m (71 lb in).

Fig. 139: Crankshaft Balancer

9. Install the crankshaft balancer (1) and rotate in shown direction (2) in order to inspect the function of the oil pump mechanism. Crankshaft balancer should rotate easily.
10. Install the engine front cover. Refer to Engine Front Cover with Oil Pump Replacement.

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