Hi am new to this wonderful forum, been browsing for the last fews day and all you guys have great knowledge on these cars. i was wonder if any can help with these question, i have a astra mk4 1.6 club y plate auto, how do i know if its a 8v or 16v as it is not mentioned on my log book? also since i got it (2 weeks now) ive never seen the fan working, how do i know its working or not working? the temperature gauge is in the middle when am driving. just abit confused if any one can help.