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Crankshaft Front Oil Seal Replacement > < Engine Flywheel Replacement - 1.4L LDD

Astra J

Crankshaft Balancer Replacement

Special Tools

•  EN-470-B   Angular Torque Wrench
•  EN-956-1   Extension
•  EN-49979   Crankshaft Shock Mount Retainer

For equivalent regional tools, refer to Special Tools .

Removal Procedure

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
2. Remove the right wheelhouse liner. Refer to Front Wheelhouse Liner Replacement .
3. Fix the drive belt tensioner, remove the drive belt from crankshaft balancer and lay aside. Refer to Drive Belt Replacement .

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Note::  The crankshaft balancer can be incorrectly installed 180° from the required position. Be sure to note the location of the alignment hole on the crankshaft balancer prior to removing the crankshaft balancer from the engine.
4. Rotate the engine clockwise until the bore (2) in the crankshaft balancer aligns with the mark (1) on the engine front cover.
5. Install EN-49979   crankshaft shock mount retainer to EN-956-1   extension .

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6. Loosen the crankshaft balancer bolt (4) while fixing the crankshaft balancer (3) with EN-49979   crankshaft shock mount retainer (1) and EN-956-1   extension (2).

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7. Remove and DISCARD the crankshaft balancer bolt (2).
8. Remove the crankshaft balancer (1).

Installation Procedure


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Note:  The crankshaft balancer flange must fit to the hexagon of the oil pump rotor (2) and to the two-flat of the crankshaft (1). The TDC markings on crankshaft balancer and engine front cover must match.
1. Install the crankshaft balancer carefully by pressing into position.

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2. Measure the distance (a) between the crankshaft balancer (2) and the mark on the engine front cover (1). The distance (a) should be 5.5 mm (0.21654 in) .

Note:  Never re-use the crankshaft balancer bolt.
3. Install a NEW crankshaft balancer bolt.

Caution: Refer to Fastener Caution .

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4. Tighten the crankshaft balancer bolt (4) to 150 N·m (111 lb ft) while fixing the crankshaft balancer (3) with EN-49979   crankshaft shock mount retainer (1) and EN-956-1   extension (2). Use EN-470-B   wrench .
5. Tighten the crankshaft balancer bolt to an additional 60° while fixing the crankshaft balancer (3) with EN-49979   crankshaft shock mount retainer (1) and EN-956-1   extension (2).
6. Install the drive belt to the crankshaft balancer and remove the fixing pin. Refer to Drive Belt Replacement .
7. Install the right wheelhouse liner. Refer to Front Wheelhouse Liner Replacement .
8. Lower the vehicle.
9. Check and correct engine oil level.

Crankshaft Front Oil Seal Replacement > < Engine Flywheel Replacement - 1.4L LDD