Design features of the VAZ-21126 engine Pic. 5.1. Longitudinal section of the VAZ-21126 engine: 1 - oil pump; 2 – generator drive pulley; 3 - connecting rod; 4 - piston pin; 5 - timing belt drive; 6 - cover of the gas distribution...
Useful tips for engine repair With a certain skill and care, many malfunctions of the engine and its systems can be quite accurately determined by the color of the smoke coming out of the exhaust pipe. Blue smoke indicates that...
Cylinder compression check Compression (pressure at the end of the compression stroke) in cylinders - the most important indicator for diagnosing the condition of the engine without disassembly. By its average value and by the...
Removal and installation of a decorative casing of the engine To improve the appearance of the engine compartment and reduce the noise level, a decorative plastic casing is installed on the engine. For most engine repairs and maintenance, this cover must be...
Removal and installation of a mudguard of the engine The steel mudguard of the engine located below protects the engine compartment from contamination and is a power protection for the engine crankcase. Remove the engine mudguard if it is damaged or to...
Setting the piston of the first cylinder to the TDC position Piston of the 1st cylinder to the TDC position (top dead center) the compression stroke is set so that when carrying out work related to the removal of the camshaft drive belt, the installation of...
Replacing the timing belt and tensioner pulley Pic. 5.4. Timing mechanism drive scheme: 1 – a gear pulley of a cranked shaft; 2 - toothed belt; 3 - water pump pulley; 4 - tension roller; 5 – a pulley of a camshaft of final valves; 6 – a back...
Replacing power unit supports power unit (engine and gearbox) mounted on two rubber pads front and rear, fixed through brackets on the engine and gearbox housing. These supports are designed to transfer the weight of the power...
Engine disassembly features Before dismantling, the engine must be thoroughly cleaned of contaminants, installed on a stand or stand (the engine must be stable). Use appropriate tools for disassembly (wrenches, pullers, etc.)....
Replacing the cylinder head cover gasket In the VAZ-21126 engine, the joint between the cover and the cylinder head is sealed with a sealant applied to the mating surfaces of the parts. If the oil leak from under the cylinder head cover...
Replacing the cylinder head gasket If a leak of engine oil or coolant is detected at the junction of the head with the cylinder block, remove the head and replace its gasket. A leak can also occur due to warping of the block head due...
Replacement of valve stem seals An external sign of wear on the valve stem seals is the short-term appearance of blue smoke from the exhaust pipe after starting the engine and when braking the engine after a long drive under load....
Replacing camshaft seals If traces of oil leakage through the camshaft seals are found, first check if the crankcase ventilation system is clogged and if its hoses are pinched, if necessary, troubleshoot. If the oil leak...
Replacing the front crankshaft oil seal If traces of oil leakage through the crankshaft seals are found, first check if the crankcase ventilation system is clogged and if its hoses are pinched, if necessary, troubleshoot. If the oil leak...
Replacement of a back epiploon of a cranked shaft The reason for oiling the clutch discs may be a leak in the gearbox input shaft oil seal or the crankshaft rear oil seal. Engine and transmission oils differ in smell. With a certain skill, it can be...
Replacing the oil pan gasket If oil leakage through the oil sump gasket cannot be eliminated by tightening the oil sump bolts, then the gasket is severely deformed and must be replaced. Carry out work on an inspection ditch,...
Replacing the O-rings of the intake manifold To seal the joint between the flanges of the cylinder head and the intake manifold, as well as between the flanges of the throttle assembly and the intake manifold, sealing rings are installed in the...
Replacing the gasket of the collector A sealing gasket is installed between the flanges of the cylinder head and the collector, made of two thin molded metal strips, interconnected by spot welding. If the gasket is leaking, the exhaust...
Removal, troubleshooting and installation of the flywheel The flywheel is removed to replace the crankshaft rear oil seal, to replace it if the ring gear is damaged, and to grind the surface for the clutch disc. You will need: the tools needed to remove the...
Removal, troubleshooting and installation of camshafts Camshafts are replaced in the following cases: pressure drop in the engine lubrication system. The cause of this malfunction is often increased wear on the camshaft journals and sockets in the...
Checking and replacing hydraulic pushers The hydraulic pushers of the VAZ-21126 engine, made in the form of cylindrical pushers located between the camshaft and valves, combine two functions: transferring force from the camshaft to the...
Possible malfunctions of hydropushers Possible malfunctions of hydraulic pushers, their causes and solutions * The following reasons for increased noise in idle mode are possible, which increases with increasing crankshaft speed up to...
Dismantling, repair and assembly of the cylinder head Pic. 5.9. Cylinder Head Details: 1 - block head; 2 – an inlet camshaft; 3 - stuffing box; 4 - final camshaft; 5 – the case of bearings of camshafts; 6 - block head cover; 7 – an arm of fastening of a...
Lapping of valves For lapping valves, it is most convenient to use a special mechanical device (reversible drill). In addition, ready-made manual valve holders are on sale. Pic. 5.13. Valve lapping tool: 1 - metal...
Removal and installation of the engine Remove the engine and transmission assembly by lowering it down from the engine compartment. It is more convenient to remove the engine from the car mounted on a lift. Before removing the engine, it...
Engine disassembly Install the washed and cleaned engine on a stand for disassembly or on a solid massive stand and drain the oil from the crankcase (if this was not done before removing the power unit). You will need:...
Troubleshooting engine parts After disassembly, thoroughly clean, rinse and dry all parts. You will need: a portable lamp, a set of flat probes, a ruler, a caliper, a caliper, a micrometer, a scraper. 1. Clean the piston head...
Engine Assembly You will need: torque wrench, hammer (preferably with a soft metal or polyurethane striker), a device for installing pistons in cylinders, the same wrenches as for disassembling the engine, a...