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2006 SuperDuty 6.0 delta EOT vs. ECT range question

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2006 SuperDuty 6.0 delta EOT vs. ECT range question

 
  #1  
Old 06-12-2019, 07:59 PM
BPryan
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2006 SuperDuty 6.0 delta EOT vs. ECT range question

Hello all,

I have a 2006 F250 6.0 with 180k miles on it, arp headstuds, egr deleted, oil cooler, gaskets, work done at 95k have paperwork, running with a livewire tuner (used to monitor live gauges, have stuck with the tune the shop put on it with the engine work). To get to the point, I have invested to keep her in good shape, recently I have been noticing the eot and ect have been out of the +/- 7 - 14 degree range as I have seen on these forums. The ect seems to sit at 184 degrees sometimes bumping up to 186 - 188 while the eot is at 206 - 208 (this only happens at speeds over 50). At idle or 35ish mph, the temps stay within the above stated delta (184ect/196eot). This has been a recent observation that was not previously like, outside air temps ranging from the 60s to 90s. A few things I did prior to this was added the diesel archoil additive to a handful of tanks of fuel per the directions as well as the archoil additive to the last round of oil when I did the oil change. If anyone has any insight as to what might be going on, it would be most appreciated, I did look through the forums and was unable to find specifics. Could it be a thermostat, clogging oil cooler, bad sensor, pcm, etc???? Thanks for your time, looking forward to hearing back any information

.

Bryan
 
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Old 06-12-2019, 08:39 PM
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There is also a puff of white smoke that comes out of the exhaust when I start the truck for the first time of the day.
 
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Old 06-12-2019, 11:14 PM
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Your ECT is a little low, I would change the thermostat first, get one from International, for some reason they seem to work better. After that recheck your temps.
 
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Old 06-13-2019, 12:49 AM
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Thank you for the info jet, i am by no means a mechanic in any way, i know these trucks can be fickle, i am currently averaging 19+ mpg, just changed oil and fuel filters. The truck still has been running the same as when i got it at 150k, trying to stay ahead of any major issues. To me this is concerning enough to reach out to folks here with the knowledge. I have been able to get solid info from these forums when ive previously had questions, going to look into a thermostat, anyone in the Charleston SC area have recomended mechanics?
 
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Old 06-13-2019, 12:52 AM
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Ive also recently had the coolant flushed.
 
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Old 06-13-2019, 09:51 PM
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when the coolant was flushed was it done with chemicals, or just water? Also what coolant was put back in?
 
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Old 06-14-2019, 10:54 AM
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I was on a trip with my family and ended up going to a dealership for the flush, not sure what they flushed with but i did make sure they used the ford gold coolant. I did this in hopes to help with the delta but it didnt make any difference. How it is now is how it was before the flush.
 
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Old 06-14-2019, 01:04 PM
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My ect was running low like that. Didnt think anything of it untill i did a trip into the mountains, ect went way up. Long story short, my thermostat was bad and staying partially open. Factory thermostat is set at 195, so now my truck runs warmer but Deltas stay where they should. And these 6.os like running hotter too...
 
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Old 06-14-2019, 01:52 PM
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Ford added a code in the newer year trucks just for that. It signals the check engine light to come on if there is a temp difference (delta) greater than 30 degrees between coolant temp and oil temp.I think it is P0128. Maybe the code is P012F. Looking it up...
 
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Old 06-15-2019, 09:14 AM
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I would recommend getting rid of the Ford gold coolant, there are many posts about it on here. I run Final Charge EC1 rated coolant as many have switched to the Cat EC1 rated coolants that help eliminate the oil cooler plugging problems./ If you search the forums for EC1 coolant or Ford gold coolant problems you will find a lot of info. In the mean time just make sure you maintain your Ford gold as recommended.
 
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Old 06-15-2019, 08:36 PM
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I appreciate the information all and will keep you posted. Crossing my fingers it's just replacing the thermostat.
 

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