Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › Lack of Cooling Efficiency › Reply To: Lack of Cooling Efficiency July 22, 2020 at 10:39 am #961920 David HallParticipant The radiator looks to be in decent shape, however it is original. There isn’t any debris blocking it, either. I’m thinking the lower radiator hose is collapsing at the higher speeds.