My 05 f-350 6.0 is giving me some problems. I am new to these forms so please be patent if I don't get right back to you. I have 311,000 on my truck. It had had its share of problems, at 80,000 it blew its first head gasket. Ford fixed that one!! At 199,000 it blew its second one. I had head studs installed this time. At 299,000 I had to replace two injectors, a new turbo, a egr delete kit, a new oil cooler, power steering gear box, and while I was burning 1000.00 dollar bills I put a new edge cts on it. I'm in Denver doing a job. One the way out day one it was 95 temp out side, the truck ran great coolant temp and oil temp stayed around 202 to 204. Day two 70 degrees my o temp hit 235 while the coolant temp went to 210. Backed off the throttle to 60 mph. Coolant temp dropped to 202, but the oil temp stayed around 217 to 220. I can not make the oil temp go above 198 with out the trailer. The other thing that scares me the most is my coolant level dropped about a half gallon!!! It is not blowing any white smoke, there is no coolant smell or leaks that I can see, and the holding tank has no evidence of being over pressurized. The edge system does not give me any codes except for the two for my egr delete. If anyone has an idea I would love to hear it, thanks

 

Sounds like it could be leak in the EGR delete kit or the oil cooler. I had the engine oil temp problem but no coolant leak. I did the EGR delet and oil cooler at the same time and so far no problem. I have 2004 6.0.

 

I also have an issue. Have recently developed a vibration or rattle at approx 1300 rpm. I think it may be the cataletic converter but not sure. If anyone has any info that might help with where to start looking it would be appreciated.

 

With the EGR delete your fan may not be coming on when it should be, the computer looks for EGR valve operation to set the fan speed. Top off the coolant to the correct cold level, drive easy and see what happens. I see temps like that when I am towing regularly, but I don't try to run fast when I am towing - 60 is fine for me. I tow a tall car hauler box trailer, usually around 8K lbs. I would run the stock tune when towing.

Brian

 

Thanks for the replies! I Have removed the catalytic converter when I first got the truck, ran 4" back, no muffler or catalytic converter. One other problem I am having is my egt's are running higher than normal. I have to shut the ac off and let the truck idle for about 15 minutes just to get the temp to 320. With the air on my egt stays around 350-370, also my ac is not working well, it works fine then starts to warm up until I step on it. If my egr delete kit is leaking how can I test it? Where does the coolant go? It does still have the original water pump, could that be part of my issues?