1.5 liter SOHC car engine Chevrolet Aveo 1.5 (T250)

Description of the engine design
Cylinder head cylinder head (further cylinder head) made of aluminum alloy. The intake and exhaust ports are located on opposite sides of the cylinder head....

Engine specification 1.5 SOHC
Total information engine's type 4-cylinder (in-line) Cylinder displacement 1.498 l Bore and stroke 76.5x81.5mm Compression ratio 9,5 ±0,2:1 The order of...

Tightening torques for threaded connections
Application Nm, (line angle) Compressor piping screw 33 Compressor mounting screws 27 Compressor mounting screws 50 Air filter housing mounting screws 12...

Cylinder head parts
1. Screw 2. Oil filler cap 3. Valve cover 4. Throttle body screw 5. Throttle position sensor 6. Idle Air Control Valve 7. Throttle body 8. Throttle body gasket...

Cylinder Block Parts
58. Piston ring kit 59. Piston 60. Piston pin 61. Connecting rod 62. Set of connecting rod bearings 63. Bolt for connecting rod bearing cap 64. Oil dipstick...

Maintenance and repair
Attention: before carrying out any work on the engine, disconnect the negative cable from the battery. If for some work it is necessary to have voltage in the...

Removal and installation of a cover of the valvate mechanism
To remove the valve cover, disconnect the crankcase ventilation hose from the valve cover. Then - disconnect the ignition wires from the spark plugs and the...

Removing the cylinder head
Carry out an operation to reduce the pressure in the fuel system. To do this, let the engine run for 10 seconds with the fuel pump off. Remove the fuse to turn...

Cleaning the cylinder head
Clean the surfaces of the cylinder head and block in contact with the gasket. Check for deep scratches and nicks on the cylinder head gasket and engine block...

Installing the cylinder head
1. Apply a continuous bead of 3 mm wide sealant to the sealing surface of the camshaft housing. 2. Install the cylinder head gasket. 3. Install the cylinder...

Removing the camshaft
1. Remove the toothed belt. 2. Disconnect the vent tube on the timing cover. 3. Remove the valve cover screws. 4. Remove the valve cover. 5. Remove the valve...

Installing the camshaft
1. Install the camshaft. 2. Establish an axial clamp of a camshaft. 3. Tighten the camshaft axial retainer screws to 10 Nm. 4. Measure the axial run of the...

Checking and adjusting the timing belt tension
1. Disconnect the negative battery cable. 2. Disconnect the supply air temperature sensor connector. 3. Disconnect the air duct from the throttle body. 4....

Removing the timing belt
1. Disconnect the negative battery cable. 2. Disconnect the supply air temperature sensor connector. 3. Disconnect the air duct from the throttle body. 4....

Installing the timing belt
1. Align the mark on the crankshaft sprocket with the mark on the back of the timing case. 2. Align the mark on the camshaft sprocket with the mark on the back...

System oil pressure measurement
1. Remove the right wheel mudguard. 2. Remove the oil pressure sensor connector. 3. Install the adapter in place of the oil pressure sensor. 4. Connect the...

Removing the oil pump
1. Disconnect the negative battery cable. 2. Remove the toothed belt. 3. Remove the rear of the timing case 4. Disconnect the oil pressure sensor connector. 5....

Oil pump installation
1. Inspect all parts for wear. 2. Apply clean engine oil to all parts of the oil pump. 3. Replace all parts. Fill all cavities of the oil pump with petroleum...

Removing the oil pan
1. Drain the engine oil from the engine. 2. Disable rear oxygen sensor (HO2S). 3. Disconnect the flanges securing the catalytic converter to the exhaust...

Cleaning the oil pan
Clean the surface of the oil pan in contact with the gasket. Clean the surface of the engine block in contact with the gasket. Clean the oil pan bolts. Clean...

Installing the oil pan
1. Install the oil pan gasket. 2. Install the oil pan on the engine block. Attention: install the oil pan 5 minutes after applying the sealant-gasket to the...

Removal and installation of the frame of the power unit
Withdrawal 1. Disconnect the negative battery cable. 2. Remove the air filter housing. 3. Support the motor with a stand. 4. Remove the power unit frame...

Removing the engine
On vehicles equipped with a manual gearbox, the gearbox must be removed before starting to dismantle the engine. 1. Remove the fuel pump fuse. 2. Perform the...

Engine installation
1. Install the engine in the engine compartment. 2. Align the gearbox dowels with the gearbox holes. 3. Tighten the gearbox housing bolts to 75 Nm. 4. Install...

Dismantling of the block of cylinders
Caution: Be extremely careful not to cause any scratches, dents or other damage to the crankshaft. Such damage can impair engine performance. 1. Remove the...

Checking the condition of parts
1. Check the connecting rods for deformation (bending and twisting). If the connecting rods are deformed, replace them. 2. Check the condition of the...

Assembly of the cylinder-piston group
1. Connect the connecting rods to the pistons so that the mark on the piston is directed towards the front of the engine (to timing). 2. Install the piston pin...

Assembly of the crank mechanism
All parts must be cleaned before assembly. 1. Use a plastic gauge to determine the clearances in all crankshaft bearings. See « Selection of connecting rod...

Selection of main bearing shells using a plastic gauge
1. Apply a coat of engine oil to the crankshaft main bearings. 2. Install the upper and lower crankshaft main bearings. 3. Install the crankshaft. 4. Check up...

Selection of connecting rod bearing shells using a plastic gauge
1. Apply a coat of engine oil to the connecting rod bearing shells. 2. Install the upper and lower connecting rod bearings. 3. Establish the lower loose leaves...

Dismantling of a head of the block of cylinders
1. Remove the cylinder head along with the intake and exhaust manifolds. 2. Remove the coolant temperature sensor. 3. Remove the exhaust manifold heat shield....

Cylinder head inspection
1. Clean the plane mating with the head gasket. 2. Inspect the cylinder head gasket and mating surfaces of the head and cylinder block for pits, leaks,...

Restoration of parts of the cylinder head
Parts Recovery Basics For the described engines, the manufacturer provides for steam recovery «guide sleeve - valve stem» using valves with oversized stems. In...

Cylinder head assembly
1. Install the camshaft housing dowels. 2. Lubricate the valve stems with engine oil. 3. Install valves. 4. Install valve stem seals. 5. Install the valve...

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