Evans coolant causing a high delta? 2005 6.0 - Ford Powerstroke Diesel Forum

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post #1 of 18 Old 01-29-2013, 10:25 AM Thread Starter
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Evans coolant causing a high delta? 2005 6.0

just got my truck back from the shop, (2005 6.0) after headgasket replacement, with studs. oil cooler was changed, system was flushed and evans was put in the cooling system.

1.5 hour drive home, I was monitoring the coolant-oil delta (bully Dog tuner) coolant only got up to 185 F, while oil was 201F. delta of 16 degrees! before the HG change it was always around 8F delta. With a new oil cooler how is this possible?

has anyone else had a similar experience?
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post #2 of 18 Old 01-29-2013, 10:37 AM
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From what I understand your coolant temp is low and it may be time for a thermostat. I think it is supposed to be higher than that. Just a suggestion.

2004 CCSB 4x4, blue spring, SCT , 4" exhaust, Gearhead tunes, egr delete, ELC-1, Coolant filter, ARP Studs, CCV Mod, 6" lift, 35" Toyo A/T II.


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post #3 of 18 Old 01-29-2013, 10:38 AM
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Also, did you check it on level ground at 65 mph. Those parameters are important also.

2004 CCSB 4x4, blue spring, SCT , 4" exhaust, Gearhead tunes, egr delete, ELC-1, Coolant filter, ARP Studs, CCV Mod, 6" lift, 35" Toyo A/T II.


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post #4 of 18 Old 01-29-2013, 10:40 AM
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How well was your cooling system flushed out? Was Restore and Restore+ used? Did they do Evans de-watering procedure? You can't do this switch over without doing a LOT of pre-work. Even after doing all the required steps it'll take a fair amount of time for every last bit of water to work it's way out of your cooling system. Have helped switch over a couple buds to Evans and they both found an improment in their deta T's.
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post #5 of 18 Old 01-29-2013, 11:39 AM Thread Starter
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They claim the flush was done exactly as per the 6.0 flush procedure from evans.
The evans flush chemical was used
My coolant always used to run around 200- 215F. Perhaps the thermostat is stuck open? But that does not explain the delta! If coolant is 185 the oil should be no more than 190! Especially with a new oil cooler. Also the engine warms up in a normal amount of time and there is good heat in the cab. Ambient temps here are around -24c
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post #6 of 18 Old 01-29-2013, 11:49 AM
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That is strange. DeltaT shouldn't be that bad. I'm assuming they flushed your cooling system THEN put in the new cooler?
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post #7 of 18 Old 01-29-2013, 01:47 PM Thread Starter
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Well im hoping so!! Im about to call them for that answer!
And i am changing thermostat just for giggles
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post #8 of 18 Old 01-29-2013, 01:54 PM
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Yah it would'nt be the first time a "knowledgeable" person thought it was ok to flush the cooling system AFTER installing a new oil cooler. LOL
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post #9 of 18 Old 01-29-2013, 03:13 PM Thread Starter
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No answer. Of course they closed early today!!!
They better not have flushed it after the new cooler was put in!!! I specifically told them Fum Ducks to flush it before changin the cooler!!!!
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post #10 of 18 Old 01-30-2013, 04:47 AM Thread Starter
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So i changed my t stat- (oem). Coolant is 194 oil is 206. Better heat in the cab, ambient temp is -37 c. Still pretty big delta. I have a bullet proof diesel water pump, so im pretty sure thats not the issue! Anyone know if evans has a higher temp thermostat or something?
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