Helped a buddy with a 2011 1.4 Audi A1 yesterday, battery run flat and confirmed not charging. Load tested alternator power/ground with a head light bulb and only saw about 0.2v drop = main wires good, probed signal wire with a scope (plug connected, Linbus) picture perfect trace = Linbus is up and communicating and confirms that the alternator is kaput.
Before I got started changing it out today thought Id try get some of the roof shaded as it was supposed to be around 30c, had some left over DPM from the pit and managed to get about 2/3 of the worst part of the roof covered, just an experiment to what works and what doesnt, used some leftover batten to tack it down and 6" timber I had as a centre stand off (think mini tent), worked great despite the DPM being black dropping ceiling surface temps about 10c and close to ambient. Temps in the pit always seem to hold 20c no matter what so I thought id try blast some of that cool air into the rest of the garage, had one o them fans they use for bouncy castles sitting doing nothing, noisy but high pressure/flow, worked better than expected, kinda jets the cool air straight up and smashes it off the ceiling over me and the job, and kept the garage a comfortable blustery 29c most of the day, most notable plus was not feeling like your head is next to a heat lamp

. Relieved to get some sort of control over the crazy temps in the garage.
Fan inlet temp after settling out some.
