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  #1  
Old 05-03-2010, 06:27 PM
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Overheating while towing.

Posting this for my brother. He has a F-350 (05 I think) that is over heating any time he pulls a load. From what I understand, it doesnt matter how heavy it is, the truck overheats as soon as he starts towing something. Also, from what I understand, it doesnt matter if it is stock or on one of the tunes. I have read some of the posts and best as I can figure, he needs to do an EGR delete and replace his oil cooler. Does this sound right to anyone? I am a 7.3 guy so I dont know much about the 6.0 L. I will get more info on the truck when he calls me back.
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Old 05-03-2010, 06:33 PM
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How many miles on his truck?

Could be oil cooler. Could be faulty radiator. Could be head gaskets (hope not). Could be EGR cooler (which actually superheats the coolant - doesnt cool anything at all)
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Old 05-03-2010, 07:07 PM
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It is a 05 with 130,000 and a bully dog tuner
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Old 05-03-2010, 07:17 PM
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I know this is a stupid question, but are all of his fluids up? Does it feel like his trans slips alot under load, which could cause higher egts. Maybe his egr valve is stuck or being pushed open under boost allowing for super heated exhaust to re enter the intake causing a richer af (more smoke) and skyrocketing his temps till he puke coolant. He is puking correct? Or is he just seeing the needle peg itself?
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Old 05-03-2010, 07:40 PM
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His fluids are good. All it is, is the needle pegging. I am thinking that it is the egr valve being stuck or getting pushed open. But like I said before, I dont know a whole lot about the 6.0s
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Old 05-03-2010, 07:55 PM
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The EGR pushing open could be boiling the coolant or near to it under load. IF he lets off the throttle does the needle go back down quickly or slowly? Quickly i would say is the egr. Slowly (more than 5-10 mins) might be something else. You can always just pull the valve out and check its function and if it seems sooted or wet.
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Old 05-03-2010, 08:07 PM
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Thanks for all of the input. I think I finally have him convinced to do the truck right. I told him to do the EGR delete/ block off and then while he is in there to do the oil cooler and clean the turbo. Also told him to get rid of the cat and muffler and strait pipe the beast.
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Old 05-03-2010, 08:08 PM
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You mentioned he has a tuner - if the tuner is turned up - while towing under load - that could enhance the overheat problem. Personal experience here with my Banks system - towing heavy on too high of a program. the second I tuned down - EGT's dropped significantly.
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Old 05-03-2010, 08:10 PM
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Look on the forum here, under 6.0 Mod Help. Scroll toward the bottom to DIY EGR Delete. I printed this thread off and handed it to my mechanic. $50 later I had an EGR deleted truck. (my mechanic is a friend of mine and was already working on full ARP install, head gasket replacement, decked heads, etc. so EGR delete was no big deal for him) but he said the parts totaled $50.
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Old 05-03-2010, 08:22 PM
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It doesnt matter whether he has it on a tune or on stock. It still does it.

I wil look at the DIY EGR and pass that on to him. Thanks for the info.
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