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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.

Final valves

Inlet valves

Arrangement of valves:

And — the engine M 123
B — the M110 engine

Adjustment of gaps of valves on the engine M 123


 PERFORMANCE ORDER

  1. Uncover a head of the block and turn out spark plugs.
  1. 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).
  1. 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.
  1. If the adjusting bolt did not possible to receive the required gap, it is possible to replace a press head on a valve core.
  1. Repeat this operation on other inlet valves in the sequence 1 — 5 — 3 — 6 — 2 — 4; then in the same way adjust final valves.
  1. Pay special attention to an arrangement of valves.

Valvate gap, mm

M 123
M 110
cold
hot
cold
hot

Inlet

0,10

0,15

0,10

0,15

Final

0,20

0,25

0,25

0,30