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4-9-snyatie-proverka-sostoyaniya-i-ustanovka-komponentov-klapannogo-mekhanizma.html
4.9. Removal, check of a state and installation of components of the valvate mechanism
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- Remove the camshaft (see below).
- Take a pusher from the landing nest in a head of cylinders — try to remember the adjusting provision of components.
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The pushers removed from the engine have to be stored in vertical position, the surface contacting to a yoke up! If this requirement for any reasons cannot be fulfilled, it is necessary to put pushers in an oil bathtub for the purpose of prevention of hit of air in a cavity of hydraulic compensators of valvate gaps. |
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Check
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- Estimate degree of wear of pushers, check them for existence of signs of mechanical damages. By measurement of outer diameters of pushers and internal diameters of their landing nests calculate sizes of landing gaps of components. Make sure that results of calculations conform to standard requirements (see Specifications).
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Installation
Before installation pushers should be oiled pure motive.
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- Serially put pushers in the guides of a nest in a head of cylinders.
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Track that each pusher was established strictly on the former place! |
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Camshafts
Identification of bearing necks of camshafts and dimensional characteristics for definition of gaps in bearings
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Before removal of a belt of the GRM drive the engine should be given to the provision of VMT of the end of a step of compression of the piston of the first cylinder — track correctness of combination of adjusting tags of cogwheels distributive and cranked in bulk (see Replacement of a belt of the GRM drive). |
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In order to avoid damage of valves and pistons do not turn shaft at the taken-off GRM drive belt! |
Removal
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- Uncover the gas-distributing mechanism (see Removal, check of a state and installation of a head of cylinders).
- Take off a GRM drive belt (see Replacement of a belt of the GRM drive).
- Holding the camshaft from a provorachivaniye a wrench for the lysk located directly behind a cogwheel turn out a bolt of fastening of the last.
- Remove cogwheels of both camshafts.
- Remove a back cover of the GRM drive.
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- Remove assembly of an axis of yokes and take pushers of valves (see above).
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- By means of the dial measuring instrument measure the size of an axial side play of both camshafts.
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- Accurately take the camshaft through the forward party of a head — try not to scratch bearing necks. Remove a camshaft epiploon.
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Check
Installation
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- Oil a camshaft epiploon pure motive.
- Fill an epiploon in the landing nest and by means of a suitable mandrel press it aflush with a head surface.
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As a mandrel the replaceable face head of the corresponding size, or a piece of a pipe of suitable diameter can be used — the mandrel has to rest only against a rigid face surface of an epiploon! |
- Oil pure motive surfaces of cams and bearing necks of a shaft and accurately put it in a head of cylinders. Establish a persistent plate and a back cover of a head of cylinders — track that the shaft was developed by the directing pin up.
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Make installation of pushers of valves (see above). Temporarily record pushers in nests a wire, then establish assembly of an axis of yokes and in two-three receptions evenly tighten bolts of its fastening.
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- Establish a back cover of the GRM drive — track that fixing bolts were tightened with the required effort.
- Establish a camshaft cogwheel — oil a carving part and the lower cut of a head of a fixing bolt before installation motive. Tighten a bolt with the required effort.
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In order to avoid damage of valves and pistons do not turn shaft at the taken-off GRM drive belt! |
- Establish a gas-distributing belt (see Replacement of a belt of the GRM drive).
- Further installation is made as it should be, the return to an order of dismantle of components — track that all fixture was tightened with the required effort.
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