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

🧭 Before you start

Fits: platform codes 6A1, 6A5

• Opens: coolant
• Renewed: water pump body

Don't miss

• The thermostat valve must be seated with the centring pin in the water pump body guide.
• Ensure proper gasket seating (arrows).
• If the guide pins are broken, replace the water pump body.

🔧 Engine codes this applies to

📋 Procedure

1. Drain cooling system .
2. Remove the water pump (1).
3. Remove the screws (arrows).
4. Remove the water pump body (1) from the cover (2).
5. Remove the thermostat valve (small circuit) (3).

6. Support the thermostat valve in the water pump body.
7. The thermostat valve must be seated with the centring pin in the water pump body guide.
8. Ensure proper gasket seating (arrows).
9. Drench the sealing gasket in coolant.
10. Support the housing cover on the water pump body.
11. Ensure that the guide pins are properly seated in the water pump body guides (arrows). [Note: If the guide pins are broken, replace the water pump body.]
12. Install and tighten the fastening bolts in the indicated sequence of (A) to (F).
13. Install the water pump (1).
14. Replenish cooling system .
15. Install the air filter .

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