Ha, shop manuals give labor times, but don't mention certain conditions. Like if replacing a water pump or timing belt, the engine is sitting on your kitchen table and not in the vehicle.
Or trying to remove a made in China cold rolled unplated steel bolt screwed into aluminum, electrolysis occurs welding that bolt to the aluminum, only way to get it out is to drill it out. Same thing with torx bolts, very fine teeth that rust off, also have to be drilled in places where you only an inch of space.
Provided nobody else was in there before you really screwing up the assembly. Practically all engine transaxle assembly are no longer installed on top of the vehicle, raise the entire body and put it in underneath.
Dealers have to follow OEM labor times, that's why many of them do not like to do warranty work. Only get paid a small fraction of their hourly charge.
This is true, and the OEM manufactures have teams of people that do nothing but run a repair in the shortest time to standardize the time. Also they are well equipped plus they do not include the time it takes to get the vehicle inside the building nor up on a lift and any other things like options a person may have added to the vehicle. Just a simple set of splash guards can add time or a set of lights or a bully bar, you name it the time never represents true time.