Originally Posted by Laferty
O yeah.... I forgot to add in... and don't hit on me for my mistake but I do not believe I am harming anything and am going to do a full coolant system flush this weekend.
I noticed that the coolant bottle we empty and I read all over last night about the no heat at idle causes and I liked the theory about the system being low on coolant would not create enough pressure and such at idle so I stopped and got a bottle of silicate free coolant which is right according to the 6.0 trouble section, and added it in. It does not meet so and so spec Ford Gold stuff but that is the coolant that contains silicates.... I couldn't tell what color was in the truck but the stuff I added was orange. I am going to stop by Napa and see if I can find a good flush additive to run the next few days before the actual flush. The truck took a gallon of the coolant and was sitting at the mark on the reservoir, drove around and the bottle was empty again so I need more. But the truck was making heat at idle and I parked and idled for about 10 minutes in a clean area in a parking lot and didn't see any leaking or such. The sound is still present under acceleration. I'm thinking a water pump issue....
Maybe this information helps.
Man, i'm not gonna bash you, just let me clear something up. Plain and simple, it sounds like you are heading down the coolant issue blues road. Do this and hope for the best, drain your system, remove the thermostat and remove the thermostat from the housing, reinstall, flush with tap till clear, and remove the left block drain and lower hose each time. Be careful it's hot. Once clear, flush with 24 gal of distilled water to get back to a ph of 7. Draining the same way. After that refill with 3.5 gal of any brand concrtrated elc with the cat ec-1 rating that will be listed on the jug. Obviously replace with a new oem thermostat before filling with elc. Allow yourself a full day, and do not allow straight water to sit in there overnight. You need to pull the egr to check for moisture in the intake.
Sent from my phone that somebody didn't help me get.