The Clerget had neither the peculiar intake arrangements of the Gnome nor the strange connecting rods of the Le Rhône. Its valves were actuated by conventional rocker arms from two pushrods per cylinder, these constituting a recognition feature. Clergets were made in 110 hp and 130 hp models, and the 130 may have been a little overdeveloped, since it was subject to overheating. It used a special type of piston ring, called an "obdurator" ring, below the wrist pin to block heat transfer from the combustion area to the lower part of the cylinder. When this ring broke, as it was prone to do, the cylinder turned blue from the heat; a blue color meant that the steel had been heated to 600°F (316°C). Clergets were generally very well engineered except for this problem, those made in England by Gwynne being especially excellent.