Thermostat valve (large circuit) - remove and install — VW

🧭 Before you start

Fits: platform codes 5U3, 5UC, 5UB

• Opens: coolant
• Renewed: seal

Don't miss

• The thermostat valve must be seated precisely with the centring pin in the guide(arrow) of the water pump cover (1).
• Replace the seal.Drench the gasket in coolant.
• Ensure proper gasket seating.

🔧 Engine codes this applies to

📋 Procedure

1. Drain cooling system .
2. Remove air filter
3. Release the clamp (4) and remove the hose (3).
4. Remove the screws (arrows).
5. Remove the cover (2).

6. Remove the thermostat valve with the Spanner T10508.
7. Press the Spanner T10508 slightly downwards, turning it in the direction of the (arrow).
8. Remove the thermostat valve.
9. The thermostat valve must be seated precisely with the centring pin in the guide(arrow) of the water pump cover (1).
10. Install the thermostat valve with the Spanner T10508.
11. Press the Spanner T10508 slightly downwards, turning it in the direction of the (arrow) until the stop. [Note: Replace the seal.Drench the gasket in coolant.]
12. Ensure proper gasket seating.
13. Install the cover (1) in the water pump cover.
14. Install and tighten the fastening bolts in the indicated sequence of (A) to (D).
15. Replenish cooling system .
16. Install the air filter .

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