Hello guys
I had 2008 polo gti for atleast six months now ever since i got it i could here my sai pump whining noise in the morning for a cold starts for 30 secs. Few days ago i started her up in the morning i couldnt hear it like i used to and plus on that day i ran the car for couple of hours..turn her off at the shop came back after 5mins start her up and the temp gauge went right down even though thr car is hot and it will take a few mins for temp gauge to reach half again. Got temp sensor replaced and now i still couldnt here my sai pump for cold start. Any ideas what could caused the two things playing up at the same time? Please help