6.5L Diesel Runs Hot When Towing

Volume 1 Issue 2 - 6.2/6.5 Issues and Answers

A mechanic told me that all 6.5’s run hot when towing a heavy load, but I am not so sure he knows what he is talking about. When we are going uphill with the camper and boat, the gauge goes over to about the three-quarters mark, but it didn’t used to go that far. I think something is wearing out or getting weak. Any ideas?


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