Pushrod tube seal 2CV6 made from Viton. 1970->1990. An oil spill that is common in with the Citroën 2CV engine is where the pushrod tubes connect to the crankcase. Here, a rubber seal is used that looks like a pair of glasses. An original rubber dries out quickly, which is why we have chosen a Viton rubber for this Burton 2CV Parts product. This synthetic material is resistant to engine oil and high temperatures. In addition, the shape of this pushrod tube seal rubber has been improved in such a way that it fits optimally, around the push rod tubes, in the spring cups, and to the engine sump aswell.