1.5 liter SOHC car engine Chevrolet Aveo 1.5 (T250)

Description of engine design
Cylinder head The cylinder head (hereinafter referred to as the CBC) is made of aluminum alloy. The intake and exhaust ports are located on opposite sides of...

1.5 SOHC Engine Specifications
General information Engine type 4-cylinder (in-line) Working volume of cylinders 1,498 l Cylinder diameter and piston stroke 76.5x81.5 mm Compression ratio 9,5...

Tightening torques for threaded connections
Application Nm, (rotation angle) Compressor Pipe Fastening Screw 33 Compressor mounting screws 27 Compressor mounting screws 50 Air filter housing mounting...

Cylinder head parts
1. Screw 2. Oil filler cap 3. Valve cover 4. Throttle body mounting screw 5. Throttle position sensor 6. Idle air supply control valve 7. Throttle body 8....

Cylinder Block Parts
58. Piston ring set 59. Piston 60. Piston pin 61. Connecting rod 62. Connecting rod bearing set 63. Connecting rod bearing cap fastening screw 64. Oil level...

Maintenance and repair
Warning: Before performing any work on the engine, disconnect the negative cable from the battery. If some work requires voltage in the vehicle's electrical...

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

Removal the cylinder head
Perform a pressure reduction operation in the fuel system. To do this, let the engine run for 10 seconds with the fuel pump disconnected. To disconnect the...

Cleaning the cylinder head
Clean the cylinder head and block surfaces that contact the gasket. Make sure there are no deep scratches or nicks on the cylinder head and engine block gasket...

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

Removal the camshaft
1. Remove the timing belt. 2. Disconnect the ventilation tube on the timing cover. 3. Remove the valve cover screws. 4. Remove the valve cover. 5. Remove the...

Installing the camshaft
1. Install the camshaft. 2. Install the camshaft axial lock. 3. Tighten the camshaft axial lock screws to a torque of 10 Nm. 4. Measure the axial runout of the...

Checking and adjusting the tension of 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....

Removal 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 timing pulley with the mark on the rear of the timing belt cover. 2. Align the mark on the camshaft sprocket with the mark...

Measuring oil pressure in the system
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...

Removal the oil pump
1. Disconnect the negative battery cable. 2. Remove the timing belt. 3. Remove the rear part of the timing belt cover 4. Disconnect the oil pressure sensor...

Installing an oil pump
1. Inspect all parts for wear. 2. Apply clean engine oil to all oil pump parts. 3. Install all parts in place. Fill all cavities of the oil pump with Vaseline...

Removal the oil pan
1. Drain the engine oil from the engine. 2. Disconnect the rear oxygen sensor (HO2S). 3. Disconnect the catalytic converter mounting flanges from the exhaust...

Cleaning the oil pan
Clean the surface of the oil pan that contacts the gasket. Clean the surface of the engine block that contacts the gasket. Clean the oil pan mounting bolts....

Installing the oil pan
1. Install the oil pan gasket. 2. Install the oil pan onto the engine block. Caution: Install the oil pan within 5 minutes after applying the sealant gasket to...

Removal and installation the powertrain frame
Removal 1. Disconnect the negative battery cable. 2. Remove the air filter housing. 3. Support the engine with a stand. 4. Remove the powertrain frame bracket...

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

Engine installation
1. Install the engine into the engine compartment. 2. Align the gearbox mounting bushings with the gearbox holes. 3. Tighten the gearbox housing bolts to 75...

Disassembling the cylinder block
Caution: Be extremely careful not to scratch, dent or otherwise damage the crankshaft. Such damage may impair engine performance. 1. Remove the engine. 2....

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

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 (towards the timing belt). 2. Install...

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

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

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

Disassembling the cylinder head
1. Remove the cylinder head together with the intake and exhaust manifold. 2. Remove the coolant temperature sensor. 3. Remove the exhaust manifold heat...

Cylinder head inspection
1. Clean the surface where the head gasket meets. 2. Inspect the cylinder head gasket and the mating surfaces of the head and cylinder block for cavities,...

Restoration of cylinder head parts
Basic information on parts restoration For the engines described, the manufacturer provides for the restoration of the "guide bushing - valve stem" pair using...

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

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