This procedure removes and replaces the EGR cooler assembly on the 2.5L I4 engine, including disconnection of coolant lines, exhaust connections, and electrical components.

Warnings

Tools required

Parts

• EGR cooler assembly × 1 — Use OEM Hyundai part number
• EGR cooler gasket × 1 — Included with cooler assembly or separate
• Exhaust flange gasket × 1 — Use OEM specification
• Coolant hose clamps × 2 — Replace if damaged
• Engine coolant × 1 — Hyundai/Kia Long Life Coolant (Green)

Fluids

• Hyundai/Kia Long Life Coolant (Green) — 2.5 qt

Preparation

1. Ensure engine is completely cold (minimum 2 hours after last operation)
2. Disconnect negative battery terminal and wait 3 minutes
3. Remove engine cover by pulling upward on all four corners to release clips
4. Place large drain pan beneath radiator drain plug
5. Open radiator drain plug and drain approximately 3 quarts of coolant until level is below EGR cooler connections
6. Close radiator drain plug hand-tight
7. Raise vehicle on jack stands if additional underside access is needed for exhaust work

Procedure

1. 1

   Remove engine heat shields
   Remove the upper engine heat shields covering the EGR cooler area. Remove all heat shield mounting bolts using 10mm socket. The shields may be secured with 4-6 bolts depending on configuration. Set shields aside.
   Torque spec

   Heat Shield Bolts10 Nm (7 lb-ft)
2. 2

   Disconnect EGR valve electrical connector
   Locate the EGR valve electrical connector on top of the EGR assembly. Press the locking tab and pull connector straight off. Move wiring harness aside to provide clearance.
3. 3

   Remove oxygen sensor (if obstructing access)
   If the upstream oxygen sensor blocks access to EGR cooler exhaust connections, remove it using a 22mm oxygen sensor socket. Turn counterclockwise to remove. Inspect sensor threads and replace if damaged. Keep sensor protected from contamination.
   Torque spec

   O2 Sensor45 Nm (33 lb-ft)
4. 4

   Disconnect coolant hoses from EGR cooler
   Using hose clamp pliers, reposition the spring clamps on both coolant hoses connected to the EGR cooler (inlet and outlet). Be prepared for coolant spillage. Twist hoses gently while pulling to remove from cooler ports. Plug hose ends with rags to minimize coolant loss. Inspect hoses for cracks or deterioration.
   ⚠Residual coolant will drain from hoses and cooler. Ensure drain pan is positioned to catch spillage.
5. 5

   Remove EGR cooler to exhaust manifold connection
   Locate the exhaust flange connection between the EGR cooler and exhaust manifold. Remove the flange bolts (typically 2-3 bolts) using 14mm socket and extensions as needed. Access may be tight; use universal joint if necessary. Once bolts are removed, separate the flange connection and remove old gasket material.
   Torque spec

   Exhaust Flange Bolts45 Nm (33 lb-ft)
6. 6

   Disconnect EGR pipe from intake manifold
   Locate where the EGR pipe connects to the intake manifold. Remove the flange bolts securing this connection using 12mm socket. Note the orientation of any brackets or support tabs. Separate the connection carefully.
   Torque spec

   Exhaust Flange Bolts45 Nm (33 lb-ft)
7. 7

   Remove EGR cooler mounting bolts
   Locate all mounting bolts securing the EGR cooler assembly to the engine block or cylinder head (typically 3-4 bolts). Use 12mm or 14mm socket as appropriate. Support the EGR cooler with one hand while removing the final bolt to prevent it from falling.
   Torque spec

   Mounting Bolts27 Nm (20 lb-ft)
8. 8

   Remove EGR cooler assembly
   Carefully maneuver the EGR cooler assembly out of the engine bay. The assembly may need to be tilted or rotated to clear surrounding components. Residual coolant will drain from the cooler, so keep it over the drain pan. Once removed, drain any remaining coolant from the cooler into the pan.
9. 9

   Clean all mating surfaces
   Using a gasket scraper and wire brush, thoroughly clean all gasket mating surfaces on the exhaust manifold flange, intake manifold flange, and engine mounting points. Remove all old gasket material, carbon deposits, and corrosion. Wipe surfaces clean with shop rags. Inspect for cracks, warping, or damage.
   ⚠Do not gouge or scratch mating surfaces. Deep scratches can prevent proper sealing.
10. 10

    Install new EGR cooler assembly
    Position the new EGR cooler assembly with new gaskets in place. Align all mounting points and connections. Start all mounting bolts by hand to ensure proper alignment before tightening any fasteners. Install and torque mounting bolts in a cross-pattern to ensure even clamping.
    Torque spec

    Mounting Bolts27 Nm (20 lb-ft)
11. 11

    Reconnect EGR pipe to intake manifold
    Install new gasket (if applicable) at the intake manifold connection point. Align the EGR pipe flange to the intake manifold. Install flange bolts and torque to specification in a cross-pattern.
    Torque spec

    Exhaust Flange Bolts45 Nm (33 lb-ft)
12. 12

    Reconnect EGR cooler to exhaust manifold
    Install new exhaust flange gasket between the EGR cooler and exhaust manifold connection. Align the flange holes. Apply anti-seize compound to exhaust flange bolt threads. Install bolts and torque to specification in a cross-pattern.
    Torque spec

    Exhaust Flange Bolts45 Nm (33 lb-ft)
13. 13

    Reconnect coolant hoses
    Reconnect both coolant hoses to the EGR cooler inlet and outlet ports. Ensure hoses are fully seated on the ports. Reposition spring clamps or install new clamps if originals are damaged. Double-check that clamps are positioned properly over the hose barbs.
14. 14

    Reinstall oxygen sensor (if removed)
    If oxygen sensor was removed, apply a small amount of anti-seize compound to the threads only (avoid the tip and sensing element). Thread sensor into exhaust manifold by hand to prevent cross-threading. Tighten to specification using oxygen sensor socket.
    ⚠Never apply anti-seize to oxygen sensor tip or sensing element. This will damage the sensor.
    Torque spec

    O2 Sensor45 Nm (33 lb-ft)
15. 15

    Reconnect electrical connections and reinstall heat shields
    Reconnect the EGR valve electrical connector, ensuring it clicks into place. Reinstall all engine heat shields and secure with mounting bolts torqued to specification. Reconnect negative battery terminal.
    Torque spec

    Heat Shield Bolts10 Nm (7 lb-ft)

Reassembly

1. Refill cooling system with Hyundai/Kia Long Life Coolant (Green) to proper level
2. Bleed air from cooling system: Run engine with radiator cap off until thermostat opens and coolant circulates, add coolant as needed until level stabilizes
3. Reinstall engine cover by aligning clips and pressing firmly until all four corners click into place
4. Check for coolant leaks at all EGR cooler hose connections while engine is at operating temperature
5. Check for exhaust leaks at all flange connections while engine is running

Verification

• Start engine and allow to reach normal operating temperature while monitoring coolant level
• Verify no coolant leaks at EGR cooler inlet/outlet hose connections
• Verify no exhaust leaks at EGR cooler exhaust flange connections (listen for hissing or use soapy water)
• Ensure EGR valve electrical connector is secure and no warning lights are present
• Test drive vehicle and verify smooth operation with no rough idle or hesitation
• After test drive, recheck coolant level when engine is cool and top off if necessary
• Scan for diagnostic trouble codes to confirm EGR system is functioning properly

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