I replaced water pump about 45 days ago. Everything has been working fine. I have noticed a smell similiar to when your car overheats. 2days ago the temp outside dropped to single digets and I was warming up car and I noticed a loud clicking noise from engine. I shut car off for a few minutes and when a tried restarting the battery failed and also started clicking. I charged battery and restart car. The clicking noise was still coming from engine. I took serpentine belt off and started car and the clicking noise was gone. What is wrong?