S2 3B Cooling problems

[ristokru]

Hi,

I have a problem with cooling down car.
On the track temp is 90-100c. Coming off the track and letting the car cool down but the temp rise above 100c. Longer time car is working in idle, it goes hotter every minute. Its not normal that it cant hold temp about 90c.
Why it dont hold temp. in 90c? I did put new thermostat but nothing. Can aux rad help me?

[AndyP]

Is your after-run pump working?

[LHD_Kid]

Are all 3 fan speeds working when they should?

[ristokru]

How can i check after run pump? It looks that all 3 fan speeds are working. Fan will is going work between 90c and also when its 100c and over But it will work about 10-30 seconds. Must it be working till coolant is about 90c?