- Cock the parking brake, start the engine, warm up it up to the normal working temperature and leave working at single turns.
- Disconnect the PCV valve by a detachment of a ventilating hose from a cover of a head of cylinders.
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- Having pressed a finger to an entrance opening of a hose, make sure in the presence of depression of it.
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- Remove the valve and blow in an entrance opening of bigger diameter, - air has to pass freely, then blow in an entrance opening of smaller diameter, - air should not be passed through the valve.
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- The defective valve is subject to replacement, - track correctness of connection of the valve at installation.
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