11. The plug looks similar to a poppet valve . 12. Tyres are examples of poppet valves . 13. The engine was a vertical one with horizontal, opposed poppet valves for inlet and exhaust. 14. External wastegates generally use a valve similar to the poppet valve found in the cylinder head. 15. Lubrication is done by a dry sump lubrication system, the compressor valves are poppet valves . 16. As poppet valves came into use, a simplified valve gear using a camshaft came into use. 17. Thirty engines, numbers 73125 to 73154, were built with Caprotti valve gear and poppet valves . 18. Poppet valves date from at least the 1770s, when James Watt used them on his steam engines.19. The sidevalve's poppet valves are usually sited on one side of the cylinder ( s ). 20. The valves, like other poppet valve Daimlers, had wide clearances, in some cases more than.
