Join Date: Jan 2011
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6.0 Thermostat Issues
I live in sunny So Cal and never pay much attention to the temp gage unless I am towing and the 6.0 starts running hot.
Over the holidays I took a trip with the family to Washington and Central Oregon, and had a very unusual problem with the 6.0.
It was very cold and for some reason the 6.0 would not heat up. I could not even get the needle on the gage to the first line. The heater would only blow cold air.
I assumed that the Thermostat must be stuck wide open and would not allow the antifreeze to stay in the block long enough to get warm. I drove around 700 miles in these two states and never had a heater or an engine running at proper temp.
When I got back to So Cal, I pulled out the old Thermostat and replaced it with a new one. The old unit looked to be perfectly fine and was closed when I pulled it out.
Is there anyone out there that may have had a similar issue and knows what else may be keeping the 6.0 from reaching proper temp? I am at a loss as to where to look next.