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Autopapyrus · Renault Talisman 1.5 dCi K9K (2019)
https://autopapyrus.com/guides/renault/talisman/egr-valve-cleaning/
Compiled automatically from service literature and owner experience. Specs are for the typical configuration — check them against your exact car before you start.

Renault Talisman 1.5 dCi K9K (2019): EGR Valve Cleaning

The EGR valve on the 1.5 dCi K9K clogs with carbon deposits because exhaust gas is recirculated back into the intake manifold. This causes rough running on a cold start, unstable idle, and codes P0400 / P0401. Cleaning the valve instead of replacing it is an economical option, as long as the seals or the valve body don't need replacing.

Difficulty: Medium Time: 2-3 hours Steps: 19 Tools: wrench set (7, 8, 10, 13, 16 mm), screwdrivers (flat and Phillips), carbon cleaning brush or cable, solvent (WD-40 or diesel-grade kerosene), clean rags, new gasket (fiber/paper composite)

Part

  • 🔩 EGR gasket Renault 8200 815 191 or 7700 274 051 (aftermarket equivalents Elring 227.360, Corteco 227.360). New valve seals may also be needed (confirm by VIN)
There's a full repair manual for this car Every system, wiring diagrams and torque specs — not just this job. Haynes AutoFix (online). See manuals →

Step by step

19 steps
  1. Disconnect the battery (negative terminal) for 10-15 minutes to reset the control unit memory.
  2. Remove the upper engine cover (3-4 bolts, 10 mm wrench).
  3. Disconnect the throttle position sensor connector (if it is within reach) and all other electrical connectors on the manifold.
  4. Slightly loosen the intake manifold mounting bolts (do not remove them completely) to get access to the EGR. The EGR valve is usually held by 2-3 bolts (16 or 13 mm wrench).
  5. Carefully disconnect the exhaust gas recirculation pipe (it may have a latch or an M8 bolt). Keep a rag ready, because a little diesel fuel may leak from the line.
  6. Disconnect the EGR valve electrical connector (the lock tab is usually pressed upward).
  7. Remove the 2-3 bolts securing the EGR valve to the intake manifold (installation torque 20-25 N·m (15-18 lb-ft); confirm in the Renault K9K service manual).
  8. Carefully remove the valve together with the gasket. Remove the old gasket completely and clean off any residue with a scraper or screwdriver.
  9. Disassemble the EGR on a workbench (it is usually held by 3-4 bolts to the valve body). Inside you will find a piston and a spring covered in black carbon.
  10. Soak the EGR piston in solvent (WD-40, kerosene) for 15-20 minutes. Then clean all piston surfaces with a cleaning brush or a soft brush, removing the carbon. Do not scratch the sealing rings.
  11. Also wipe the inside of the EGR housing with a rag soaked in solvent. If the design allows, blow it out with compressed air.
  12. Inspect the piston sealing rings. If they are cracked, hardened, or have lost their elasticity, replace the complete EGR valve. A new valve is cheaper than dealing with exhaust gas leaks.
  13. Reassemble the EGR (tighten the bolts carefully, 3-5 N·m (2.2-3.7 lb-ft), no more).
  14. Install a new gasket (fiber/paper composite, 1-2 mm thick) between the EGR and the intake manifold.
  15. Install the EGR in place and tighten the mounting bolts evenly in a crisscross pattern (torque 20-25 N·m (15-18 lb-ft)).
  16. Reconnect the EGR electrical connector and the exhaust gas recirculation pipe.
  17. Tighten the intake manifold bolts (torque 20-25 N·m (15-18 lb-ft); confirm in the service manual, as it depends on bolt size).
  18. Install the engine cover and reconnect the battery.
  19. Start the engine and listen for unusual noises. The system needs to relearn (1-2 minutes at idle). A P0400 code may appear. Clear it with a scan tool after starting and fully warming up the engine (it usually goes away on its own after 50-100 km (30-60 miles)).

Common mistakes and warnings

  • — If the engine still runs unevenly after cleaning the EGR valve, or the P0400 code stays on, the valve itself may be at fault (worn or seized piston). In that case the complete valve needs replacing (Renault 8200 459 043 or equivalent). — Make sure the cooling system is completely full before starting the work, because small coolant leaks are possible when the manifold is disassembled. — If you are not confident about disassembling the EGR piston, or you don't see obvious deposits, don't disassemble it. Use an intake system cleaning additive in the fuel tank (Liqui Moly, BG 44K, Chevron Techron) instead, which takes much less work.