Removing and installing actuator for engine temperature regulation N493 — AUDI

🧭 Before you start

Fits: Audi A4 B9 (8W, 2015–)

• Opens: coolant
• Renewed: gaskets
• Also covered elsewhere: Electronic parts catalogue

Don't miss

• Disregard (item 2).
• Renew gaskets and O-rings.
• Do not reuse coolant.

🔧 Engine codes this applies to

📋 Procedure

1. Remove toothed belt for coolant pump .
2. Lift retaining clips (arrows), disconnect coolant hoses and move them clear.
3. Unplug electrical connector (1) for coolant shortage indicator switch F66.
4. Unscrew bolt (2) and detach coolant expansion tank (3).
5. Remove throttle valve module J338.

6. Lift retaining clips (1, 3) and disconnect coolant hoses. [Note: Disregard (item 2).]
7. Unplug electrical connector (arrow) from actuator for engine temperature regulation N493.
8. Remove bolts (1 ... 5).
9. Detach actuator for engine temperature regulation N493 from centring pins and pull actuator off engine oil cooler. [Note: Renew gaskets and O-rings.]
10. Lubricate new O-rings (4) lightly with coolant, for coolant refer to Electronic parts catalogue.
11. Check whether the two centring pins are fitted in the cylinder block; install if necessary.
12. Fit connecting piece (2) into engine oil cooler (1).
13. Push actuator for engine temperature regulation N493(3) onto connecting piece and centring pins in cylinder block.
14. Tighten bolts for actuator for engine temperature regulation N493.
15. Install toothed belt for coolant pump .
16. Install throttle valve module J338. [Note: Do not reuse coolant.]
17. Fill up with coolant .
18. If actuator for engine temperature regulation N493 was renewed, perform adaptions listed in Guided Function "“01 - Functions, engine mechanics”".

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