Yes I did it, it was a real pain to do on the car, and I had to be mindful....I suspect it really wasn't that hard...but it did leave me with a sore back and scraped hands.
Yes it can be done on the car but honestly for the sake of doing it better I would take it off. There is little room between the pump and engine and getting those nuts off the side might be outside your tool set. I think you can get one of those socket like wrenches in there but you will be fighting all the while you are doing it. And just drop something and it is in a very hard place to reach up past the radiator hoses.Yes I did it, it was a real pain to do on the car, and I had to be mindful....I suspect it really wasn't that hard...but it did leave me with a sore back and scraped hands.