Cooling diagram for 2.8 b5
 

Ive been trying to troubleshoot a couple of problems with my A4. Ac is blowing cold when moving but warm at idle.. temp rises at idle only when AC is on :confused: (2nd fan not engaging pretty sure) (not sure if its a bad relay or module thats causing this) and i am leaking coolant somewhere.. looks like the radiator. To get a better idea i was wondering if anyone had a link to a site/pdf for the cooling diagram for a 2.8 a4. Ive been a bum and havent picked up a bentley. Until then can someone help this poor man out?:):eek:

I have the same exact problem minus the leaking coolant. I also have a 1.8 instead of a 2.8, but I'm thinking that may be irrelevant in this case. Anywho, here's a link to the thread I posted with the same problem: https://www.audiforums.com/forum/sho...d.php?t=137511

Alright I guess it's time to get the alldata up and running. I'll send you yours outright a2thy.

I can't upload them here because of the EXTREMELY low size constraints so you're gonna have to PM me your email.:confused::mad: I have the electrical and vacuum hose diagrams. Although most likely if it's good while you're driving and not at idle you're probably just low. Looks like it takes about 750 grams. I'd personally add oil and dye while you're at it.