2.2.3. Check and adjustment of gaps in the mechanism of the drive of valves on engines M 123 and M 110
Gaps in the valvate mechanism can be checked and regulated both on hot, and on the cold engine.
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Final valves
Inlet valves
Arrangement of valves:
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Adjustment of gaps of valves on the engine M 123 |
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- Uncover a head of the block and turn out spark plugs.
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- Rotating a pulley of a bent shaft, expose the piston of the first cylinder in VMT so that the inlet valve was closed (the top of a ledge of a cam is directed up).
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- A set of probes (see the table) check a gap between a nape of a cam and a back of the lever. If the gap is normal, then the probe has to enter with easy jamming. If is not present, weaken a lock-nut and turn of an adjusting bolt by means of a wrench achieve an appropriate gap. After adjustment tighten a bolt lock-nut.
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- If the adjusting bolt did not possible to receive the required gap, it is possible to replace a press head on a valve core.
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- Repeat this operation on other inlet valves in the sequence 1 — 5 — 3 — 6 — 2 — 4; then in the same way adjust final valves.
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- Pay special attention to an arrangement of valves.
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Valvate gap, mm
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M 123
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M 110
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cold
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hot
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cold
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hot
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Inlet |
0,10 |
0,15
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0,10
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0,15
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Final
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0,20
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0,25
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0,25
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0,30
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