Hi Paul, When I said old engines, I was thinking about the side valve engine that was the engine we first had when I did some night school courses 50 odd years ago. I was quite proficient in cleaning carburettors, replacing bits like water pumps, fan belts, plugs etc, changing oil and filters, but 29 years of company cars which had to go to a main dealer for servicing got me a lot out of practice. Modern engines need experts, and nowadaysI don't get my hands dirty. Regards, Peter.