6.0 over heat - Ford Powerstroke Diesel Forum
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post #1 of 22 Old 09-23-2013, 08:29 AM Thread Starter
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6.0 over heat

06 f-350 stock owned it about 3 weeks, runs great i tow a 17ft enclosed for my company real heavy, no problems untill i load my SCT programer when i do and pull hills it over heats, have to add coolant when it cools down, take program out same route does not overheat. any ideas? i have an EGR delete im going to put on and a new oil cooler.
edit, and when it happens no white smoke

Last edited by tuffer70; 09-23-2013 at 08:45 AM.
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post #2 of 22 Old 09-23-2013, 08:52 AM
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Is there any white residue around the degas cap?

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post #3 of 22 Old 09-23-2013, 12:10 PM Thread Starter
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no sir, and forgot to say it has 150,000 miles
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post #4 of 22 Old 09-23-2013, 02:35 PM
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Do you ever hear the fan engage? Most likely the water pump. Plastic impeller has spun on its shaft

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post #5 of 22 Old 09-23-2013, 02:36 PM
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Think about upgrading to a billet one from Bulletproof Diesel

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post #6 of 22 Old 09-23-2013, 05:13 PM Thread Starter
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yes the fan comes on, ok but what is the difference between pulling hills at 70 stock and 70 with the program? if the impeller has spun i would think it would over heat all the time pulling hard
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post #7 of 22 Old 09-23-2013, 07:48 PM
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Quote:
Originally Posted by tuffer70 View Post
yes the fan comes on, ok but what is the difference between pulling hills at 70 stock and 70 with the program? if the impeller has spun i would think it would over heat all the time pulling hard
Running a tune will cause the motor to run hotter when pulling a load, as more fuel, boost, and timing are being introduced to the motor. Most high power custom tunes tell you not to tow or haul anything when running such tunes, as the motor can heat up really fast - especially the EGTs. Tow tunes are designed for towing and usually keep EGTs in check, but even they are rated for a given load.

Is the "Engine Overtemp" alarm coming on? What are the ECTs and EOTs at which you think you are overheating? Failing head gaskets can also cause rapid ECT increases under load, as cylinder temps and pressures get introduced into the cooling system.

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post #8 of 22 Old 09-24-2013, 05:36 AM
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Originally Posted by skanj0 View Post
Running a tune will cause the motor to run hotter when pulling a load, as more fuel, boost, and timing are being introduced to the motor. Most high power custom tunes tell you not to tow or haul anything when running such tunes, as the motor can heat up really fast - especially the EGTs. Tow tunes are designed for towing and usually keep EGTs in check, but even they are rated for a given load.

Is the "Engine Overtemp" alarm coming on? What are the ECTs and EOTs at which you think you are overheating? Failing head gaskets can also cause rapid ECT increases under load, as cylinder temps and pressures get introduced into the cooling system.
Exactly. Sometimes a tune can bring to light problems you didnt even know you had

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post #9 of 22 Old 09-24-2013, 06:12 AM
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What SCT tune are you running when you pull the trailer?

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post #10 of 22 Old 09-24-2013, 04:38 PM
Fill it up again Dummy
 
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How much coolant are you having to put in afterwards?

If you are not venting it out of the coolant recovery cap and you are not leaking anywhere its going somewhere.......

The dirty truth about programmers is: like stated above they can make small problems more noticeable. Tuners advance timing and increase cylinder pressure by several means boost is one.
It could be a head gasket problem, very slight issue with stock cylinder pressures. Crank up cylinder pressure and the leak will increase.
Best way to rule this out is by installing a 30 psi gauge into the cooling system. Normal pressures are around 10 psi + or- 3lbs. Any spikes in pressure under a heavy acceleration is a sure sign of combustion gases entering cooling system.

I hope this is not your issue, but you would be wise to investigate it.


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