pending on temperature of the air all nitro engine will get hot. the heat sink can onyl do so much. i know when i run my trucks and cars in the freezing cold i can touch them for about 5 seconds without getting burned but in normal temps it will get much hotter. 2 sesoncs sounds like it is runnning hot although some engines are designed to handle more heat. ask around and see what people with the same engine are saying it may be normal