2.8.3.2. Dismantling and assembly of a head of cylinders
Details of the block of cylinders of the engine M 102
Dismantling of a head of cylinders of the 4-cylinder engine
Dismantling
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Dismantling of a head of cylinders of the 4-cylinder engine
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Removal of crackers of valves on a head of cylinders of the 4-cylinder engine |
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- Remove a head of cylinders.
- Remove a final collector with laying.
- On engines with injection of fuel remove the inlet pipeline together with the measuring instrument of a consumption of air and the batcher of fuel assembled.
- On engines with hydraulic pushers of valves gradually turn off bolts of fastening of cases of bearings of the camshaft.
- Remove plates of pushers and apply tags on pushers and on their nests.
- Take out the camshaft from support of a head of cylinders.
- Exempt valves from crackers, squeezing a spring of valves special adaptation.
- On the engine with adjustable gaps in the drive of valves as much as possible turn out adjusting bolts.
- Gradually turn off bolts of fastening of bearings of an axis of yokes.
- Remove a plate, a spring, take out the valve and mark its situation in a head of cylinders.
- Remove a maslootrazhatelny cap from the directing valve plug.
- Take out a basic washer of a spring.
- Check a condition of valves, saddles and the directing plugs of valves, and also a gap between the directing plugs and cores of valves.
- Clear a head of cylinders and the removed details. On engines with hydraulic pushers of valves check channels of lubricant of axes of yokes (a condition of the ball backpressure valve).
- Eliminate the revealed malfunctions (the sizes see in the subsection Design and technical characteristics —
the Cooling system).
- After grinding or repeated processing carefully clear saddles and channels of a head of cylinders.
- Turn off bolts of fastening of a rack of an axis of a yoke and by means of a bolt of M8 take out a yoke axis.
- Check a condition of an axis, a yoke and lubricant channels.
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Assembly
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Cross-section of a head of cylinders of engines M 102 with hydraulic compensation of thermal gaps in the drive of valves |
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Arrangement of valves on the engine M 102
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- Napressuyte on the new maslootrazhatelny caps directing plugs of valves.
- Insert valves into the directing plugs, establish springs and plates of springs.
- Squeezing a spring special adaptation, establish crackers of valves.
- On engines with hydraulic pushers install plates of pushers.
- Collect racks of axes of yokes with yokes and axes, having provided coincidence of channels of axes to openings of bolts of fastening.
- Lay the camshaft in support of a head of cylinders and establish racks of axes of yokes on the former place.
- Screw bolts of fastening of cases of bearings of the camshaft and tighten them gradually till the set moment (see in the subsection Design and technical characteristics — the Cooling system).
- Turn the camshaft in the situation corresponding to a combustion phase in the first cylinder (valves have to be closed, and the tag on the camshaft has to be against edge of a head of cylinders).
- Install the inlet pipeline and a final collector.
- Further assembly is carried out as it should be, the return to dismantling.
- Establish a head of cylinders.
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