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Opel Astra, ZafiraSince 1998 of releaseRepair and car operation |
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Opel Astra + Cars Opel Astra and Zafira + The operation manual + Routine maintenance - The engine Specifications Check компрессионного pressure in cylinders Diagnostics of a condition of the engine with vacuum gauge application - Procedures of repair of petrol engines SOHC without their extraction from the car Reduction of the piston of the first cylinder in position of the top dead point of a step of compression (ВМТ) Removal and cover installation газораспределительного the mechanism Removal and installation of a pulley of a cranked shaft Removal and installation of a cover of drive ГРМ Removal and installation of a belt of drive ГРМ Removal and installation натяжителя газораспределительного a belt and cogwheels of drive ГРМ Replacement of an epiploon of a camshaft Removal, check of a condition and installation of a camshaft from the case газораспределительного the mechanism Removal, check of a condition and installation of components of a drive of valves Removal and installation of a head of cylinders Removal and pallet installation картера Removal, service and installation of the oil pump Removal, check of a condition and flywheel / installation приводного a disk Replacement of epiploons of a cranked shaft Check of a condition and replacement of support of a suspension bracket of the power unit + Procedures of repair of petrol engines DOHC without their extraction from the car + Procedures of repair of diesel engines of 1.7 l and 2.0 l without their extraction from the car + The general and engine major repairs + Systems of cooling, heating + The power supply system and release + Engine electric equipment + Manual transmission + Automatic transmission + Coupling and power shafts + Brake system + Suspension bracket and steering + Body + Onboard electric equipment Stream your favorite movies and series in HD quality on 123movies. |
Procedures of repair of petrol engines SOHC without their extraction from the car Reduction of the piston of the first cylinder in position of the top dead point of a step of compression (ВМТ) The general information As the top dead point (ВМТ) is called the highest point of a piston stroke in the cylinder. Strictly speaking, in 4-taktnyh engines in the course of rotation of a cranked shaft the given position is reached by each of pistons twice: once in the end of a step of compression and the second — in the end of a final step. At performance of options of phases газораспределения and installation of a corner of an advancing of ignition in overwhelming majority of cases position ВМТ of the end of a step of compression of the piston (usually the first cylinder) is used. Necessity for reduction of the piston (it) in position ВМТ arises at carrying out of many procedures, in particular such, as removal / installation of camshafts, components of drive ГРМ and the ignition distributor. Some engines are designed in such a manner that at проворачивании cranked or distributive (ых) shaft at removed газораспределительном a belt/chain there can be an input of valves in contact with the bottoms of pistons that is fraught with risk of damage of corresponding internal components, up to destruction of moulding of a head of cylinders.
Order of performance of procedure
Reduction of any of pistons in position ВМТ is made by проворачивания a cranked shaft of the engine. If to take a detached view of the engine of drive ГРМ, the direction clockwise will be a normal direction of rotation of a cranked shaft. Remember that attempt проворачивания a shaft counter-clockwise can lead to infringement of adjustments of phases газораспределения. The first is the cylinder, extreme from outside drive ГРМ.
At performance of the listed conditions the engine will be resulted in position ВМТ of the end of a step of compression of the piston of the first cylinder. |
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