Here you go, the pink one is wrote off http://thelatebay.com/index.php?topic=1174.msg12745#msg12745 she means cylinders - left & right, hot & cold sorted innit ;D
Okay now that you have interpreted the enigmatic question you can have the pleasure of giving the reply... )
Yup, I'd check the flaps are working correctly on both sides to start with and that the fan is spinning & blowing air evenly?
Pink army has 2 beetles. One is running hot one is running right I'd guess. I assume they are the same sized engine? It could be any number of things. Quality of oil Missing tinware Missing seals Age of engineDriving styleWheel diameteretcetc