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1-1-13-porshen-i-shatun.html
1.1.13. Piston and rod
Removal
Rod cover
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Hold covers of rods with the corresponding rods for the correct repeated installation them in engine cylinders. |
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1. Unscrew nuts and uncover a rod and the bottom loose leaf of the shatunny bearing. For protection of necks of a cranked shaft dress on bolts of fastening of covers of rods pieces of a rubber or plastic tube. |
2. Wooden whetstone or the hammer handle вытолкните the piston with a rod from the cylinder.
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Removal and installation of a piston finger
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1. For dismantling and repeated assembly of the piston and a rod it is necessary to use special tools 09234-33001. |
2. Establish universal support in a clip between a rod and the piston.
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3. Insert a stripper through an opening in a clip arch.
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Insert a clip with the piston, a rod and a stripper under ползун the press. |
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4. A stripper squeeze out a piston finger from the piston.
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5. Establish directing pins via the piston in a rod, and a piston finger establish on the other side of the piston.
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Directing pins define the provision of a rod in the piston. After installation of the piston, a rod, a piston finger and the adaptation for installation of a piston finger in the inserts directing pins also define their situation in a clip.
If directing pins too small, the piston does not settle down on the center in the adaptation and the clip and / or the adaptation can be damaged. |
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6. Establish the piston assembled on a clip thus directing a pin supports a rod in a piston finger. Be convinced that the piston approaches on a clip while the directing pin will not contact with a vilochny insert.
7. Check correctness of a relative positioning of the piston and a rod and, rotating a nut with a nakatka, fix the numbered plug on a shaft.
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8. Insert a shaft through an opening in a clip arch. Press a piston finger into a rod while the plug on a shaft will not contact with the top part of an arch of the clip, thus directing pin should drop out of the piston.
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The effort of a press fitting of a piston finger should not exceed 22500 N. |
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Check
Piston and piston fingers
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| 1. Check an external surface of the piston on absence of damages, development or non-uniform wear. If necessary, replace the piston.
2. Check each piston ring on absence of damages and non-uniform wear. If necessary, replace piston rings. At replacement of the piston it is also necessary to replace piston rings.
3. Check a piston finger, inserting it into a piston opening. The piston finger should enter smoothly into the piston by pressing it a hand (at room temperature).
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Piston rings
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1. Insert a new piston ring into a flute of the piston and shchupy measure a gap between a piston ring and a flute wall. If the gap exceeds maximum permissible value, replace the piston. Gap between a piston ring and a flute in the piston:
- First kompressionny ring: 0,03–0,07 mm
- Second kompressionny ring: 0,02–0,06 mm
- Maximum permissible gap: 0,1 mm
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2. Measure a gap in the lock of piston rings, having manually inserted a piston ring into the engine cylinder. The bottom of the piston push a piston ring in the lower part of the cylinder. By Shchup measure a gap in the lock of a piston ring. Gap in locks of piston rings:
- First kompressionny ring: 0,25–0,35 mm
- Second kompressionny ring: 0,40–0,55 mm
- Maslosjemnoye ring: 0,10–0,40 mm
- Maximum permissible gap: 1,0 mm
- First and second kompressionny rings: 0,8 mm
- Maslosjemnoye ring: 1,0 mm
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Rods
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1. At installation be convinced that the rod and a cover of a rod correspond to cylinder number in which they are established. At installation of a new rod make sure that the labels defining its situation, are from the same party as a label on other rods. |
2. Replace a rod if there are damages on both basic surfaces. Also replace a rod if there is a wear or damage of the surface interfaced to a piston finger.
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Installation
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1. Establish a broad ring.
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2. Establish the top lateral directing. To establish lateral directing, at first place one end of a lateral flute of a piston ring directing between a wall and a broad ring, press it then, pressing on perimeter, establish it in a piston flute. |
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Do not use пассатижи for a release of piston rings at installation of the lateral directing. |
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3. Similarly establish the bottom lateral directing.
4. To Passatizhami for a release of piston rings establish a kompressionny ring No. 2.
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5. To Passatizhami for a release of piston rings establish a kompressionny ring No. 1. |
6. Apply a thin film engine oil on the piston and piston rings.
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7. Arrange locks of piston rings, as is shown in drawing. |
8. The special adaptation compress piston rings on the piston.
9. Establish the piston with piston rings over the first cylinder, thus the label on the piston should be directed to a forward part of the block of cylinders.
10. The handle of a hammer press the piston into the cylinder so that the bottom head of a rod was established on a neck of a cranked shaft.
11. Establish the shatunny loose leaf in a rod cover.
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12. Establish a cover of a rod and fix nuts. Be convinced that a cylinder label on a rod and a cover of a rod are on the one hand.
Inhaling moment: 32–35 N • m + to tighten on a corner 90 °–94 °
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13. Shchup inserted between a rod and cranked shaft, measure a lateral gap of a rod.
- Nominal lateral gap of a rod: 0,10–0,25 mm
- Maximum permissible gap: 0,40 mm
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