Removing and installing coolant thermostat housing with thermostat — VW

🧭 Before you start

Fits: VW Golf V / Jetta (1K, 2003–2009), VW Passat B6 (3C, 2005–2010); platform code 1F7

• Renewed: o-ring

🔧 Engine codes this applies to

🔩 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.

📐 33 workshop diagrams for AXX

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

📋 Procedure

1. Remove alternator Electrical system27Alternator.
2. Remove coolant pipes .
3. Pull coolant hose (2) off coolant distribution housing, to do this, pull out retaining clip (1).
4. Unscrew bolts (arrows) and remove thermostat housing with thermostat from engine.
5. Clean sealing surface for O-ring.
6. Renew O-ring and moisten it with coolant.
7. Fit thermostat housing on cylinder block and tighten bolts evenly to 15 Nm. — 15 Nm (11 lb-ft)
8. Further assembly is basically the reverse of the dismantling sequence.

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