My Skoda Superb 3 has a cooling system problem. Engine 2.0 TDI (122 HP, DTRA). Transmission DQ200.

The engine does not warm up properly.

When the cabin heater is off, the temperature rises to about ~70°C. When I turn the heater on, it immediately drops to around ~50°C.

The thermostat module has been replaced, but the result did not change.

Any advice?

Edited 26 February26 Feb by malvynas

Not sure about the DQ200 DSG gear box but I do know the DQ250 gearbox has a thermostat. If the DQ200 is the same that could be your problem.

I had no idea that engine was fitted to a DQ200 DSG, there is over 400 Nm torque is there not. DQ200 DSG everyplace else a 250 Nm, max torque limit.

@Evolution13 I was going by the original poster put: Engine 2.0 TDI (122 HP, DTRA). Transmission DQ200. DTRA output is 122 BHP and 250Nm torque.