I did my apprenticeship at Jaguar/Daimler in the early 70's here in the UK. OHV = Over head valve. this engine has a single camshaft within the engine with pus

I did my apprenticeship at Jaguar/Daimler in the early 70's here in the UK. OHV = Over head valve. this engine has a single camshaft within the engine with push rods opening the inlet and exhaust valves via a rocker shaft. OHC = Over head camshaft. A single camshaft sits in the head and drives the inlet and exhaust valves via a rocker shaft. SOHC = Single overhead camshaft. the camshaft sits in the head, and directly drives the inlet and exhaust valves, with no rocker shaft. DOHC = Double overhead camshaft. Two camshafts with th head, one driving directly the exhaust valves and one directly driving the inlet valves. fun animations here: https://www.enginediy.com/en-de/blogs/enginediy-blog-news-for-rc-engine/what-do-ohv-ohc-sohc-dohc-mean-on-the-engine https://www.enginediy.com/en-de/blogs/enginediy-blog-news-fo...