Removing and installing heater coolant shut-off valve N279, vehicles with petrol engine — VW

🧭 Before you start

Access is just the engine cover panel. The valve connector is unplugged, the coolant hoses are clamped with hose clamps (up to Ø 25 mm) and pulled off, then the securing bolt and nuts come out and the valve lifts from the plenum chamber bulkhead. Installation is in reverse order with the fasteners at 8 Nm, after which the clamps come off the hoses.

Fits: VW Passat CC (357, 2008–2012), VW Passat B6 (3C, 2005–2010), VW CC (358, 2012–2017)

Don't miss

• Cooling system is pressurised; warm coolant can be above 100 °C, so release pressure first.
• Clamp off both coolant hoses with hose clamps up to Ø 25 mm before disconnecting.
• Unplug the N279 connector before the hoses come off.
• Securing bolt and nuts go to 8 Nm.
• Top up and check the coolant level once the hose clamps are off.

Written for this job from the workshop steps below · TorqFix editorial.

🔩 Torque settings

Values can differ between engine variants — check the code stamped on your block.

ℹ️ Always cross-check the exact figure against your vehicle's factory manual before final tightening — a wrong torque can damage the engine. These values are extracted from workshop data and may not cover every variant or revision.

📋 Procedure

1. Remove engine cover panel 10Engine cover; Removing and installing engine cover panel.
2. Disconnect connector on heater coolant shut-off valve N279.
3. ⚠ Danger of scalding injuries.The cooling system is pressurised. When the engine is warm, the coolant temperature may be above 100° C.If necessary, release pressure and reduce temperature before carrying out repairs. — Clamp off coolant hoses using hose clamps, up to Ø 25 mm3094.
4. Disconnect coolant hoses from heater coolant shut-off valve N279.
5. Unscrew securing bolt (1) and securing nuts (3) (8 Nm). — 8 Nm (5.9 lb-ft)
6. Remove heater coolant shut-off valve N279(2) from plenum chamber bulkhead.
7. Install in reverse order.

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