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Check and adjustment of klapanny gaps
Check and adjustment of klapanny gaps
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This procedure is among those which performance does not demand removal of the engine from the car. Performance of procedure should be made on the cold engine. |
Check
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Remove an intermediate cooler of system of pressurization of air (Intercooler) (see. Power supply systems, managements of engine/decrease in toxicity of the fulfilled gases and production of the fulfilled gases).
Uncover heads of cylinders.
Having turned a cranked shaft so that cams of a drive of inlet and final valves on distributive to a shaft were developed by working ledges up, bring the piston of the first cylinder into the provision VMT of the end of a step of compression.
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With the help щупа lezviyny type measure size of klapanny gaps, result write down.
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Turning a cranked shaft in the normal direction, repeat procedure for the remained valves, passing from the cylinder to the cylinder as ignition.
Compare results of measurements to requirements of Specifications of Head the Engine, in case of need make the corresponding adjustment.
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Adjustment
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Arrange a camshaft so that the cam of a drive of the inlet valve subject to adjustment appeared will develop a working ledge vertically up.
For the purpose of simplification of access to an adjusting washer, develop a pusher of the valve risky towards the inlet pipeline.
By means of the special adaptation wring out a pusher down and, having used a small screw-driver, or other suitable tool, take an adjusting washer.
Having made necessary calculations, pick up a new adjusting washer of the demanded thickness, plant it in a pusher and repeat check.
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At calculation of the demanded thickness of a new adjusting washer it is necessary to use the following formula:
Н1 = Н0 + (dM - dS)
Where:
Н1 — Settlement thickness of a demanded washer
Н0 — Thickness of the removed washer
dM — Size of the measured gap
dS — Nominal size of a gap
For example:
Let:
Н0 = 4.00 mm, dM = 0.30 mm,
dS = 0.25 mm,
Example of collecting initial information at calculation of the demanded thickness of a new adjusting washer
Then:
Н1 = 4.00 + (0.30 – 0.25) = 4.05 (mm)
In sale adjusting washers of three dimensional ranges arrive: 3.400 ÷ 3.650 mm and 4.350 ÷ 4.600 mm with a step of 0.050 mm and 3.700 ÷ 4.300 mm with a step of 0.025 mm (only 37 options). The thickness of a washer can be determined by code number beaten out on it: so, the washer with number 3825 has thickness of 3.825 mm.