Quote from: Billbag – February 20, 2021, 09:40:20 pm<blockquote>We had big problems [$25 to 30,000] with the Cummins, that's traced to freight liner, my guess saving a few dollars on the coolant, fortunately extended warrenty covered it, with a little help from Cumins. <br/></blockquote>Sounds like a broken valve to me and any coolant issue used to cover up a mechanical problem. Tell us...