Also, good to remember that this is a 'users forum' and therefore, said 'users' are of all abilities and knowledge. Some, have a vast amount of previous working with cars or mechanical items, some have little or none, and therefore are asking for some sort of help, and, according to their abilities, will obviously be requiring different levels of help.
Those of us who are shall we say, 'mechanically minded' might tend to forget how some that have little or no mechanical knowledge seem to need more 'gentle' help that others who have better abilities. I always try to remember that I was once like that, and only gained a lot of what I know from college courses, or working with more skilled people, who were happy to share and explain to me. I have 5 C&G's in Engineering, and an ONC as well, but still try to tailor any help to the ability of the person asking for help, and ensuring they are happy with that. Years ago, I was designated as a 'mentor' in my engineering job, and was expected to give help to apprentices who were nearing the end of their time, but working on the shop floor, to help them when they needed it. Much patience and sensitivity needed to deal with those who were all of different mental and physical abilities. Some learnt quicker than others, some needed a bit more help in explaining solutions, and thought processes.
One of my tutors at college used to say, 'remember how you felt when first spent a day on the shop floor, and try to help those who are now in that situation. Pass on your knowledge, as that's the most precious thing in the world'