Twin shaft car engines Opel Astra G (petrol)

Technical data
Tightening torques (in Nm)

Description of engines
Some of the vehicles in question are equipped with 4-cylinder overhead valve engines with two camshafts and in-line cylinder arrangement. Transverse engines,...

Compression — the order of testing and interpretation of the obtained results
The procedure for checking and interpretation of the obtained results are discussed in Chapter 2A .

The order of setting the piston of the 1st cylinder at TDC of the compression stroke
Engines 1.4, 1.6 and 1.8 l 1. Disconnect the battery from ground. 2. Remove the upper camshaft belt cover (see below). 3. Turn the crankshaft clockwise by the...

Cylinder Head Cover — Removal and Installation
Engines 1.4 and 1.6 l 1. The procedure for removing the cylinder head cover is illustrated in the photo. 2. Installation is performed in the reverse order....

Crankshaft pulley — removal and installation
Engines 1.4, 1.6 and 1.8 l 1. Raise the front of the car and place it on stands, remove the right wheel and the protective fender panel. 2. Remove the drive...

Timing Belt Covers — Removal and Installation
Engines 1.4, 1.6 and 1.8 l Top cover 1. Remove the air filter housing ( see Chapter 4A ). 2. Disconnect the wires from the camshaft angle sensor, unscrew the 3...

Timing Belt for Camshaft Drive — Removal and Installation
Attention! Work is performed on a cold engine. Removal 1. Set the piston of the 1st cylinder to TDC of the compression stroke. 2. Unscrew the oil filler cap...

Tensioner and sprockets — removal and installation
Camshaft sprocket 1. Remove the camshaft drive belt. 2. Set the piston of the 1st cylinder to TDC of the compression stroke and turn the crankshaft 60°...

Camshaft Seal — Replacement
1. Remove the camshaft sprocket. 2. Drill two diametrically opposite holes in the seal and screw in self-tapping screws. Remove the seal by grasping the screws...

Camshaft and tappets — removal and installation
1. Remove the camshaft drive belt (see above). 2. Remove the camshaft sprockets. 3. In the reverse order to that indicated for tightening (see photo below)...

Cylinder head — removal and installation
1. Decompress the fuel system ( Chapter 4A ) and disconnect the battery from ground. 2. Drain the coolant. 3. Remove the camshaft belt (see photo) in the order...

Oil pan — removal and installation
Engines 1.4, 1.6 and 1.8 l Removal 1. Disconnect the battery from ground. 2. Set the handbrake, lift the front of the car and place it on stands. 3. Drain the...

Oil level sensor — removal and installation
Engines 1.4, 1.6 and 1.8 l 1. Raise the front of the car, drain the oil from the engine. 2. Disconnect the connector from the sensor, unscrew the 4 screws and...

Oil pump — removal, disassembly and installation
Removal 1. Remove the camshaft belt, crankshaft and camshaft sprockets and belt tensioner. 2. Remove the rear belt cover. 3. Remove the pan and oil receiver....

Flywheel/torque converter drive disc — removal and installation
Models with manual transmission 1. Remove the gearbox ( see Chapter 7A ) and clutch ( see Chapter 6 ). 2. Secure the flywheel from turning (see photo). Unscrew...

Crankshaft seals — replacement
Right oil seal (from the toothed belt side) 1. Remove the crankshaft sprocket. 2. Drill two diametrically opposite holes in the seal and screw in self-tapping...

Balance Mechanism — Removal and Installation (2.0L Engines Only)
Removal 1. The mechanism consists of 2 balance shafts driven by the crankshaft (see photo). 2. Remove both sections of the pan, unscrew the bolts and remove...

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