jbarnett31 Posted October 24, 2008 Share Posted October 24, 2008 ive got an 08 6.4 with no heat from the vents at idle, but it blows hot when accelerating, but the longer you drive the truck the less hot air it blows all the time. the upper radiator hose gets hot but the lower one stays cold and with the engine at operating temp the radiator is cold to the touch, i was just wondering if anyone has had a radiator stopped up or thermostate troubles before, or any more advise Quote Link to comment Share on other sites More sharing options...
Bruce Amacker Posted October 24, 2008 Share Posted October 24, 2008 There's been some thermostat problems, but your problem sounds like low coolant or an air pocket in the system. Has it been apart recently? These trucks will not bleed themselves out driving like most vehicles do. I'd probably try an AirLift cooling system bleed before getting deeper. What's the history on this truck? Good Luck! /forums/images/%%GRAEMLIN_URL%%/grin.gif Quote Link to comment Share on other sites More sharing options...
Tony302600 Posted October 24, 2008 Share Posted October 24, 2008 Thermostats....just did 2 in a row, fixed both. Quote Link to comment Share on other sites More sharing options...
Jeff_E Posted October 25, 2008 Share Posted October 25, 2008 I just finished one today that had bad thermostats AND a cavitated front cover behind the water pump. Quote Link to comment Share on other sites More sharing options...
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