This procedure covers the removal and replacement of the PCV valve on the 2016-2024 Hyundai Tucson 2.5L I4 AWD engine to restore proper crankcase ventilation.

Warnings

Tools required

Parts

• PCV valve × 1 — 26740-2GTA0 or equivalent
• PCV valve grommet/seal × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and allow engine to cool completely
2. Ensure ignition is off and key is removed
3. Locate the PCV valve on the driver's side of the valve cover, connected to the intake manifold via a hose

Procedure

1. 1

   Access the PCV valve
   The PCV valve is located on the driver's side of the valve cover near the firewall. It is connected to the intake manifold via a rubber hose. Remove any engine cover if equipped by pulling upward on the plastic clips.
2. 2

   Disconnect PCV hose from intake manifold
   Grasp the PCV hose at the intake manifold connection point and gently twist while pulling to disconnect. If the hose is stuck, carefully use a flathead screwdriver to break the seal, being careful not to damage the intake manifold port.
3. 3

   Remove PCV valve from valve cover
   The PCV valve threads directly into the valve cover. Grip the valve body firmly and rotate counterclockwise to unthread it from the valve cover. If the valve is stuck, use gentle rocking motions while turning. The valve may have a rubber grommet that stays in the valve cover.
4. 4

   Remove grommet from valve cover
   If the rubber grommet remained in the valve cover bore, use needle-nose pliers to carefully extract it. Inspect the grommet for cracks, hardening, or deformation. Replace if damaged.
5. 5

   Inspect PCV hose and ports
   Check the PCV hose for cracks, oil saturation, or collapse. Inspect the valve cover port and intake manifold port for carbon buildup or damage. Clean ports with a shop towel if necessary. Replace hose if damaged.
6. 6

   Install new grommet
   Lubricate the new grommet lightly with clean engine oil and press it into the valve cover bore by hand. Ensure it seats fully and evenly in the valve cover opening.
7. 7

   Install new PCV valve
   Insert the new PCV valve into the grommet and thread it clockwise into the valve cover. Hand tighten first, then use a torque wrench to achieve final torque specification. Do not overtighten as this can damage the grommet or valve cover threads.
   Torque spec

   PCV Valve8 Nm (6 lb-ft)
8. 8

   Reconnect PCV hose
   Push the PCV hose firmly onto the PCV valve nipple until it seats completely. Ensure the connection is secure with no gaps. The hose should require firm pressure to install.
9. 9

   Reinstall engine cover
   If an engine cover was removed, align the mounting points and press down firmly on each clip location until the cover snaps into place securely.

Reassembly

1. Ensure all hose connections are secure and fully seated
2. Verify the PCV valve is properly torqued and not cross-threaded
3. Confirm the engine cover clips are fully engaged if applicable

Verification

• Start the engine and listen for abnormal hissing or vacuum leaks around the PCV valve area
• Check for oil leaks around the PCV valve grommet after engine reaches operating temperature
• With engine at idle, remove the oil filler cap - should feel slight vacuum and may hear hissing, confirming PCV system function
• Monitor engine idle quality - rough idle should improve if PCV valve was previously failed

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