Removing and installing fuel pressure regulating valve N276 — VW

🧭 Before you start

Fits: platform code 601

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• Clean high-pressure accumulator (e.g. with commercial cleaning solution) before removing.
• Seal off high-pressure accumulator opening immediately with a suitable plug to prevent dirt from entering.
• Counterhold on housing hexagon then loosen threaded union. Then, unscrew regulating valve by hand.
• Extract dirt from bore of fuel rail (threads and sealing surface). Do not use tools or other instruments for this purpose.
• Counterhold on housing hexagon and tighten threaded union.

🔧 Engine codes this applies to

📐 51 workshop diagrams for CFWA

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

📋 Procedure

1. Remove engine cover panel .
2. Clean high-pressure accumulator (e.g. with commercial cleaning solution) before removing.
3. Also thoroughly clean threaded area of fuel pressure regulating valve N276. [Note: Seal off high-pressure accumulator opening immediately with a suitable plug to prevent dirt from entering.]
4. Removing high-pressure accumulator .
5. Dry fuel pressure regulating valve N276.

6. Counterhold on housing hexagon then loosen threaded union. Then, unscrew regulating valve by hand.
7. Extract dirt from bore of fuel rail (threads and sealing surface). Do not use tools or other instruments for this purpose.
8. Seal open fuel rail bore using a bung from engine bung setVAS 6122. [Note: The fuel pressure regulating valve N276 cannot be re-used.Make sure that sealing surfaces (deformable sealing lip) and threads on new fuel pressure regulating valve N276 are undamaged.Check sealing surface hole.Start of thread and deformable sealing lip of fuel pressure regulating valve N276 must be moistened with diesel.Moisten newly fitted O-ring with diesel just before starting assembly operations.]
9. Install new O-ring with damaging it electronic parts catalogue.
10. Tighten threaded unions of fuel pressure regulating valve N276 by hand the parts catalogue (electronic parts catalogue].
11. Align new fuel pressure regulating valve N276 so that connecting wire is free of tension after connector is attached.
12. Counterhold on housing hexagon and tighten threaded union.
13. Install high-pressure accumulator .
14. After installing, leave engine running at moderate speed for a few minutes and then switch off again.
15. Check fuel system for leaks. [Note: If the fuel pressure regulating valve N276 or the high-pressure pump have been exchanged, the learnt values for the regulating valve must be reset using the vehicle diagnosis tester: Guided functions; Resetting learnt values for fuel pressure regulating valve.]
16. Read event memory.
17. Then road-test the vehicle. Accelerate with full throttle at least once, then check the high-pressure section again for leaks.
18. Read event memory again.

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