1. Disconnect the battery from weight. |
2. Remove covers of a gear belt. |
3. On the M40 engine merge cooling liquid (see subsection 2.31) and remove the thermostat (see subsection 4.4). |
4. Establish the piston of the 1st cylinder in VMT of a step of compression (see subsection 3.1.4).
Prevention
After installation of the piston of the 1st cylinder in VMT of a step of compression and chain removal rotation of the crankshaft is not allowed, serious breakages because of impact of heads of valves with the bottoms of pistons otherwise are possible.
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5. On the M20 engine check label combination on a nave of a sock of the crankshaft with a label on a back cover of a gear belt. |
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6. The label on a cam-shaft should be opposite to cast risks on a head of cylinders. |
7. On the M40 engine put oriyentatsionny risks on asterisk of a cam-shaft and a back cover which will be used at assembly. |
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8. On the M20 engine release bolts of a roller of a natyazhitel and displace a natyazhitel towards the pump of cooling liquid, having weakened a belt. Tighten bolts. |
9. On the M40 engine release a nut of a natyazhitel and turn a natyazhitel clockwise, having weakened a belt. Tighten a nut. |
10. Check existence on a belt of a direction sign of rotation, at its absence put a label (if the removed belt in a normal state and is established again).
Prevention
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The belt is recommended to be changed at each removal, irrespective of its condition. On the M40 engine it is necessary to replace a belt after each its easing. Keep in mind that at removal of a belt from an asterisk of the crankshaft it is necessary to make considerable effort. |
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11. Remove a belt from asterisks. |
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12. Unscrew a bolt of an asterisk of a cam-shaft for what fix it a leather tape or the old gear belt dressed on teeths and compressed by flat-nose pliers. |
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13. Fix a cam-shaft from a provorachivaniye. |
Prevention
On the M40 engine the asterisk is fixed on a cam-shaft nonrigidly, the shponka allows shaft moving on some degrees. Fixing of an asterisk is provided on a konusny part of a shaft at a bolt tightening.
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14. The adaptation for fixing should cover a 4-faced neck of a cam-shaft about 1 cylinder at right angle to a head of cylinders. |
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15. If necessary fix the crankshaft and unscrew a bolt of a nave of a sock of the crankshaft. For fixing of the crankshaft the BMW 112150 adaptation (M20 engine) or 112170 (М40) which maintains the considerable effort demanded for an otvorachivaniye of a bolt is used. It should be noted that the BMW 112170 adaptation fastens to a head of cylinders and fixes a flywheel. Therefore it can be applied only if the check point or the engine are removed. |
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16. On engines with a two-level nave of a sock of the crankshaft after an otvorachivaniye of a bolt it is necessary to remove a stripper an asterisk for what it is necessary to wrap a bolt of a pulley of the crankshaft on 3 turns and to use it as a support for a stripper bolt. |