.Can anyone help? I have bought a TD5 series 2 and the radiator is at least 3/4 cold apart from the top right hand corner where the pipe is where I have a slight leak. The top pipe in my opinion is hard to squeeze, the temperature is normal and the heaters work fine, i have no oil in my header tank and no water mixed in with the oil. I have recently had the head gasket done and oil cooler changed. I did have the radiator flushed and pressure tested so didn't expect any problems but have my doubts on radiator now does it sound like it is blocked ...can anyone help??