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Repair of 6-cylinder engine BMW 3 Series E21
Main technical characteristics
The four-stroke, six-cylinder, in-line water-cooled engine is mounted along the longitudinal axis of the vehicle at an angle of 20°. The engine uses a valve...
The four-stroke, six-cylinder, in-line water-cooled engine is mounted along the longitudinal axis of the vehicle at an angle of 20°. The engine uses a valve...
Cylinder head characteristics
The cylinder head is cast from aluminum alloy. The head has three-spherical combustion chambers. The valve seats and guide bushings are pressed into the...
The cylinder head is cast from aluminum alloy. The head has three-spherical combustion chambers. The valve seats and guide bushings are pressed into the...
Cylinder Block Characteristics
The cylinder block is cast from a special grey cast iron and is integral with the cylinders. Cylinder diameters Permissible ovality of cylinder mirrors, mm:...
The cylinder block is cast from a special grey cast iron and is integral with the cylinders. Cylinder diameters Permissible ovality of cylinder mirrors, mm:...
Characteristics of the crank mechanism
Pistons The pistons are cast from aluminum alloy. Depending on the car model, the piston bottoms can be flat (on the "323i") or convex with a height of 2.1 mm...
Pistons The pistons are cast from aluminum alloy. Depending on the car model, the piston bottoms can be flat (on the "323i") or convex with a height of 2.1 mm...
Characteristics of the valve timing mechanism
The engine uses a valve timing mechanism with an overhead camshaft, which is driven by a toothed belt from a toothed pulley mounted on the crankshaft. Valve...
The engine uses a valve timing mechanism with an overhead camshaft, which is driven by a toothed belt from a toothed pulley mounted on the crankshaft. Valve...
Tightening torques for main threaded connections
Tightening torques of main threaded connections, kgf·m Cylinder head bolts on a cold engine: 1st step: 3.0-3.5; 2nd dose: 6.0-6.5; Step 3: After the engine has...
Tightening torques of main threaded connections, kgf·m Cylinder head bolts on a cold engine: 1st step: 3.0-3.5; 2nd dose: 6.0-6.5; Step 3: After the engine has...
Adjusting clearances in the valve drive mechanism
Adjustment of clearances in the valve drive mechanism is carried out by slightly opening the cylinder valves. Remove the cylinder head cover and remove the...
Adjustment of clearances in the valve drive mechanism is carried out by slightly opening the cylinder valves. Remove the cylinder head cover and remove the...
Removal the cylinder head
Disconnect the muffler inlet pipes from the exhaust manifolds and remove their mounting bracket. Remove the air filter and cylinder head cover. Drain the...
Disconnect the muffler inlet pipes from the exhaust manifolds and remove their mounting bracket. Remove the air filter and cylinder head cover. Drain the...
Installing the cylinder head
Thoroughly clean the mating surface of the cylinder head. Remove oil from the blind holes of the cylinder block using a syringe. Install the cylinder head and...
Thoroughly clean the mating surface of the cylinder head. Remove oil from the blind holes of the cylinder block using a syringe. Install the cylinder head and...
Disassembling the cylinder head
Install the cylinder head on support 11 12 100. Remove the central oil line. Remove the camshaft timing pulley. Set the rocker arms of the intake and exhaust...
Install the cylinder head on support 11 12 100. Remove the central oil line. Remove the camshaft timing pulley. Set the rocker arms of the intake and exhaust...
Cylinder head assembly
Install the valves, having previously lubricated the valve guides and stems with engine oil. Before pressing the valve stem seals onto the valve guides,...
Install the valves, having previously lubricated the valve guides and stems with engine oil. Before pressing the valve stem seals onto the valve guides,...
Cylinder Block Parts
Cylinder block details: 1 — cylinder block; 2 - oil pressure sensor; 3 - compensation tube; 4 — upper cover of the clutch housing; 5 - safety valve; 6 -...
Cylinder block details: 1 — cylinder block; 2 - oil pressure sensor; 3 - compensation tube; 4 — upper cover of the clutch housing; 5 - safety valve; 6 -...
Replacing pistons
Remove the cylinder head, oil pan and oil pump. Remove the connecting rod caps, making sure they are marked. Remove the pistons with connecting rods through...
Remove the cylinder head, oil pan and oil pump. Remove the connecting rod caps, making sure they are marked. Remove the pistons with connecting rods through...
Replacing connecting rods
Remove the pistons as described above. Measure the alignment of the centers of the holes of the connecting rod heads, the distance "A" between which should be...
Remove the pistons as described above. Measure the alignment of the centers of the holes of the connecting rod heads, the distance "A" between which should be...
Crank mechanism parts
Crank mechanism parts: 1 — crankshaft; 2 — main bearing shells; 3 - liners with thrust flanges; 4 — connecting rod; 5 — connecting rod bearing shells; 6 —...
Crank mechanism parts: 1 — crankshaft; 2 — main bearing shells; 3 - liners with thrust flanges; 4 — connecting rod; 5 — connecting rod bearing shells; 6 —...
Removal and installation the engine
Removal Remove the gearbox. Place alignment marks on the hood hinges and remove the hood. Remove the air filter housing, radiator and distribution tank....
Removal Remove the gearbox. Place alignment marks on the hood hinges and remove the hood. Remove the air filter housing, radiator and distribution tank....
Disassembly and assembly of the engine
Disassembly Place the washed and cleaned engine on a rotating stand for disassembly. Remove the intake and exhaust manifolds. Remove the ignition distributor...
Disassembly Place the washed and cleaned engine on a rotating stand for disassembly. Remove the intake and exhaust manifolds. Remove the ignition distributor...
Replacing the front crankshaft oil seal and intermediate shaft oil seal
Note: The front crankshaft oil seal and intermediate shaft oil seal can be replaced on the vehicle provided the radiator and vibration damper are removed....
Note: The front crankshaft oil seal and intermediate shaft oil seal can be replaced on the vehicle provided the radiator and vibration damper are removed....
Replacing the rear crankshaft oil seal
Remove the clutch cover and flywheel. Remove the two bolts securing the crankshaft rear oil seal holder to the oil pan. Remove the holder and press the seal...
Remove the clutch cover and flywheel. Remove the two bolts securing the crankshaft rear oil seal holder to the oil pan. Remove the holder and press the seal...
Replacing the flywheel toothed rim
Disconnect the clutch housing from the flywheel. Remove the flywheel, locking it with lock 11 2 170. Drill a hole about 8mm deep into the rim just below the...
Disconnect the clutch housing from the flywheel. Remove the flywheel, locking it with lock 11 2 170. Drill a hole about 8mm deep into the rim just below the...
Timing mechanism parts
Details of the valve timing mechanism: 1 — camshaft; 2 - mounting pins; 3 — intermediate shaft; 4 — intermediate shaft flange; 5 — camshaft pulley; 6 —...
Details of the valve timing mechanism: 1 — camshaft; 2 - mounting pins; 3 — intermediate shaft; 4 — intermediate shaft flange; 5 — camshaft pulley; 6 —...
Removal and installation the camshaft
Removal Remove the cylinder head and rocker arm shafts. Remove the thrust flange and take the camshaft out of the cylinder head bearings. Installation Check...
Removal Remove the cylinder head and rocker arm shafts. Remove the thrust flange and take the camshaft out of the cylinder head bearings. Installation Check...
Removal, installation and adjusting the tension of the camshaft drive belt
Removal Drain the engine cooling system and disconnect the cooling system hoses from the thermostat housing. Loosen the generator drive belt tension bar...
Removal Drain the engine cooling system and disconnect the cooling system hoses from the thermostat housing. Loosen the generator drive belt tension bar...
Removal and installation the intermediate shaft
Remove the timing belt. Remove the front cylinder block cover. Remove the ignition distributor sensor. Remove the intermediate shaft by first removing its...
Remove the timing belt. Remove the front cylinder block cover. Remove the ignition distributor sensor. Remove the intermediate shaft by first removing its...
Exhaust gas system
Exhaust system: A - on "320"; B - on "323i" 1 - exhaust manifolds; 2 - gasket; 3 - heat-insulating screens; 4 - exhaust pipes; 5 - brackets for mounting the...
Exhaust system: A - on "320"; B - on "323i" 1 - exhaust manifolds; 2 - gasket; 3 - heat-insulating screens; 4 - exhaust pipes; 5 - brackets for mounting the...
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