- Cock a lay brake, start the engine, warm it up to normal operating temperature and leave it running at idle.
- Disconnect the PCV valve by removing the vent hose from the cylinder head cover.
| - Pressing a finger to the inlet hose, make it in the presence of dilution.
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| - Remove the valve and Blow into the inlet of larger diameter - the air must pass freely, then Blow into the inlet of a smaller diameter - air is passed through the valve should not.
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- Defective valves must be replaced, - track correctness of connection of the valve during installation.
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