Comment Re:Roadside repairs? (Score 1) 68
But if an alternator belt has broken, it's not getting repaired at road-side.
Depends, If the car has a longitudinal engine layout it can be very easy to change an alternator belt, which is usually a single serpentine belt that runs all the engine accessories these days. If it's a lateral engine layout and there's barely enough room between the pulleys and the side of the engine bay to slip the belt through, it can be a lot more difficult but I wouldn't say impossible as a roadside repair.
Powertrain internals are where you get closer to roadside repairs being categorically impossible due to the need for specialized tools, fluid handling equipment (and fresh fluids) and a clean work environment. I'm sure someone's going to pipe in about giving an air-cooled VW Beetle a full engine rebuild on the roadside now