Hyundai Elantra: Emission Control System / Crankcase Emission Control System

Hyundai Elantra AD (2016-2020) Service Manual / Emission Control System / Crankcase Emission Control System

Schematic Diagrams

Schematic Diagram

Repair procedures

Inspection

1.	After disconnecting the vapor hose from the PCV valve, remove the PCV valve.

2.	Reconnect the PCV valve to the vapor hose.

Run the engine at idle, then put a finger over the open end of the PCV valve and make sure that intake manifold vacuum can be felt.

•	The plunger inside the PCV valve will move back and forth at vacuum.

4.	If the vacuum is not felt inspect PCV operation, if operating correctly clean or replace the vapor hose.

Positive Crankcase Ventilation (PCV) Valve Description and Operation

Operation Principle

Positive Crankcase Ventilation (PCV) Valve Repair procedures

Removal

1.	Disconnect the vapor hose (A).

2.	Remove the PCV valve (B).

Inspection

Insert a thin stick (A) into the PCV valve (B) from the threaded side to check that the plunger movement.

•	If the plunger does not move (PCV valve is clogged), clean or replace the valve.

Installation

Installation is reverse of removal.

PCV Valve installation :

1.96 ~ 2.94 N.m (0.2 ~ 0.3 kgf.m, 1.45 ~ 2.17 lb-ft)

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