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Old 07-07-2011, 08:38 PM   #1
BigBird
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overheating when towing uphill

My 06 with 78000 miles just started overheating over the weekend, but only towing 8000lb going up hill. On the inclines it would downshift pull 28-30lbs of boost at 2200-2500 rpms and the temperature would just rise and set of the temp alarm and peg the gauge with a huge loss of power. It would cool down pretty quick once I got over the steep inclines. Also about the time it would overheat a load whineing could be heard coming from under the hood (Turbo?). Running on level land the truck runs fine with no overheating. It did this on the way out there runing my SCT with the Spartan tow tune. On the way back i went back to stock programing and it still did it. Each trip I had to add 2 gallons of water as it seemed to be puking out the take.

I have been running these tunes since 07 and have put 60000 miles on the truck since i got the programmer so tunes are good. Never was an issue before as i make the trip about 10 times a year and run 85-90 the whole trip not leting the hills slow me down.

Just want to know what i'm looking at before it goes to the dealer. EGR, HG, etc.
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Last edited by BigBird; 07-07-2011 at 08:43 PM.
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Old 07-07-2011, 08:51 PM   #2
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Old 07-07-2011, 08:55 PM   #3
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Are you still under warranty?

Are you losing coolant?

Do you have white smoke out the tail pipe?

When you drive off the line does your turbo respond properly?

Are you on stock bolts?

What modifications do you have?

What has the dealer done in the past?

Do you have any leaks? beside the coolant cap.
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Old 07-07-2011, 09:08 PM   #4
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Quote:
Originally Posted by smokersteve View Post
Are you still under warranty? no
Are you losing coolant? loss 2 gallons each way

Do you have white smoke out the tail pipe? Can't Tell

When you drive off the line does your turbo respond properly? yes
Are you on stock bolts? yes

What modifications do you have? air filter, 4 in exhaust, tunner
What has the dealer done in the past? egr, injectors, alternator
Do you have any leaks? beside the coolant cap. none that i can find
answers in red
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Old 07-07-2011, 10:49 PM   #5
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No gauges? You SERIOUSLY need gauges with a 6.0
You must monitor engine coolant temp and engine oil temp if you want your truck to last.
Check out this link to a post on a different forum about longevity. It explains what you need and why. Clear ten minutes off the schedule, get a nice cold one out of the fridge, kick back relax and read up on it. <LINK>

Once you have read that, and understand the why you will know what to look for.
I am thinking that your EGR cooler has failed due to a plugged oil cooler.
In extreme cases, you can blow head gaskets.
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Old 07-07-2011, 10:55 PM   #6
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If it has progressed to head gasket failure, I will assume you going to stud it.
Don't buy the hype on the Black onyx head gaskets. They are not holding up as well as the stock ones do when studding.
When the heads are removed, have them checked at a qualified machine shop for straight/flat, and magnafluxed for cracking. Do this step yourself. It falls under "if you want a job done right, do it yourself" category. And you do want it done right, and done once.
If they must machine the surface, they can not remove more than 0.07" or you will need new heads.
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updated stuff: turbo oil supply, fuel pressure spring
deleted stuff: stock oil cooler, egr cooler, next up is the kitty
added stuff: BPD oil cooler system w/cold weather package, Insight, FP, OP and boost gauges

Replace your own EGR cooler and OIL cooler. Files and notes

Comprehensive Flushing Technique

6.0 Owners should know......
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Old 07-08-2011, 03:34 AM   #7
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[quote=NYC F-350;1084052] get a nice cold one out of the fridge, kick back relax and read up on it. <LINK>

Mmmm Good.
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Old 07-08-2011, 04:15 AM   #8
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I think I will have the heads studded, replace both coolers, and install the coolent filter. NYC gauges will get install also. Anything else I should do while its apart. Plan on keeping it for another 5yrs since Ford isn't putting out a bright yellow truck at the moment so I don't mind spending the money.
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Old 07-08-2011, 06:15 AM   #9
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sounds like gaskets to me, try towing with no tune, when mine were toast i could tow stock but with any tune even a 20hp tune it would overheat/blow coolant etc, also post up some pics, i have an amarillo as well and would like to see what your truck looks like with lift and tire size, im thinking of going down in tire size
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Old 07-08-2011, 02:14 PM   #10
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I have to agree with the above, head gaskets are likely toast, and in most cases a chain reaction that started with a clogged oil cooler. The only other thing is to make sure your engine fan is working properly. The loud whinning you were hearing was hopefully your engine fan and not the degas tank cap whining from overpressurization.

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