Hyundai Santa Fe (TM): Crankcase Emission Control System

Hyundai Santa Fe TM 2019-2023 Service Manual / Emission Control System / Crankcase Emission Control System

Schematic diagrams

Schematic Diagram

1. PCV Valve
2. Breather hose
3. Air intake hose

4. Intake maifold
5. Air breather hose
6. Cylinder block

Positive Crankcase Ventilation (PCV) Valve. Description and operation

Description

Pressure Regulating Valve (PRV) is installed to prevent the over pressure of combustion gas through the piston ring and onto the crankcase.

Operation Principle

Engine Condition	Stop	Idle or Deceleration	Normal operating condition	Accelerating in the high load area
Intake manifold pressure	0	High	Appropriate	Low
PRV (Diaphragm)	Full open	A little open	Appropriate open	Considerable open
Amount of blow-by gas	0	A little	Middle	A lot
Diaphragm component part

Positive Crankcase Ventilation (PCV) Valve. Repair procedures

Removal

1.	Remove the cylinder head cover. (Refer to Engine Mechanical System - "Cylinder Head Cover")

Installation

1.	Install in the reverse order of removal.

Crankcase Check Valve. Repair procedures

Removal and Installation

•	Be careful not to damage the parts located under the vehicle (floor under cover, fuel filter, fuel tank and canister) when raising the vehicle using the lift. (Refer to General Information - "Lift and Support Points")

1.	Disconnect the battery (-) terminal.

2.	Remove the engine room under cover. (Refer to Engine And Transaxle Assembly - "Engine Room Under Cover")

3.	Remove the drive belt. (Refer to Drive Belt System - "Drive Belt")

4.	Remove the compressor mounting bolts. (Refer to Heating, Ventilation and Air Conditioning - "Compressor")

Disconnect the crankcase check valve hose (A) and then remove the crankcase check valve (B).

Tightening torque :

9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft)

•	Push the check valve to the end of the mounting surface, and then tighten the bolt.

Schematic diagrams

Schematic Diagram ...

Evaporative Emission Control System

Description and operation Description Evaporative Emission Control System prevents fuel vapor stored in fuel tank from vaporizing into the atmosphere. When the fuel evaporates in the fuel tank, the vapor ...