The grass took out home favorite Carlos Reutemann (who had jumped into 5th at the start from 10th) in his first drive with Williams, who attempted to pass Piquet going into the Ascari chicane after the two mile flat out section. Reutemann slid off the track trying to pass Piquet on the outside of the Ascari chicane onto the grass run-off area. The two radiators in Reutemann's Williams FW07 sucked in grass and were both blocked, and the engines (already running at higher temperatures than normal) were even more prone to blowing up there in Buenos Aires because of the hot weather- a common problem at the Argentine Grand Prix.
