Thermostat: Service and Repair

Thermostat, removing and installing
Special tools, testers and auxiliary items required





^ Refractometer T10007
^ Drip tray V.A.G. 1306
^ Torque wrench (5 ... 50 Nm) V.A.G. 1331
^ Spring-type clip pliers VAS 5024

Removing

Note: Always replace seals and gaskets.

- Drain coolant.





- Pull coolant hose off connecting flange.
- Remove securing bolts - 1 - of connecting union - 2 - and remove connecting union - 2 - with thermostat - 4 -.
- Turn thermostat - 4 - 1/4 turn (90° to left and take out of connecting union - 2

Installing
Installation is performed in the reverse order. When installing, note the following:





- Moisten new O-ring - 3 - with coolant.
- Insert thermostat - 4 - into connecting union - 2 - and turn 1/4 turn (90°) to right.

Note: The brace on the thermostat must be almost vertical.

- Fit connecting union - 2 - with thermostat - 4 - into engine block.
- Tighten securing bolts - 1 -. Tightening torque: 15 Nm
- Fill with coolant.