New Cooler, but still 9 differential - Ford Powerstroke Diesel Forum
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post #1 of 20 Old 12-28-2011, 10:52 AM Thread Starter
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New Cooler, but still 9 differential

I just did a semi-bulletproofing job on my 2005 F350. I did a new oil cooler, a BPD EGR cooler, upgraded STC and upgraded turbo feed & drain tubes. My truck was not exhibiting huge temperature differentials like I see some post, but I was regularly running 10-14 delta between ECT & EOT.

It's been back together for 2 days and I've been running around locally with good results. Today I took it out on the highway and set cruise control at 2,000 RPM / 65 mph for a steady 20 minute run. On both the way out and back, the ECT was 180 and the EOT was 189. There were momentary fluctuations either way, but those were the predominant readings. It's 39 here today.

While I agree that my temp delta is smaller than before, I sort of expected more. I was under the impression I'd see 4-5 differential.

I did not do a coolant flush just before the swap, however, I did do a full coolant flush w/ VC9 & restore back around march and I've had a coolant filter in place ever since. My first coolant filter element swap showed little gunk in the pleats. The filter element I pulled off this week was the 2nd.

Any thoughts? Is my expectation off?

-Hemicbx
York, PA

2005 F350 CCLB Dually 4x4 Lariat 6.0L

Fixes:
Coolant flushed & DieselSite coolant filter
Blue spring
New OC & STC upgrade
Turbo lube tubes upgraded
Insight CS
BPD EGR Cooler
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post #2 of 20 Old 12-28-2011, 10:54 AM
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post #3 of 20 Old 12-28-2011, 10:59 AM
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The 9* spread would really not worry me too much, but both temps seem a little low. Maybe a sticking thermostat?? Might try replacing the tstat and go from there. Also keep in mind that the coolant filter will not catch everything. So if the flush loosened up debris then it might have got stuffed back in your new oil cooler.
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post #4 of 20 Old 12-28-2011, 11:12 AM
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No worries. At your ambient temps and short trips your barely up to temp. Is your Tstat good? If not replace it. If its good put a cold front on the truck

Email: Dave@powerstroke.org
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post #5 of 20 Old 12-28-2011, 12:53 PM
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looking at what you've done, you know it's not clogged. It's cooling as well as can be done with an OEM cooler. So have you checked your temps when the engine has sat cold overnight, to be sure they're reading the same temp then? Maybe one of your sensors is wrong.

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post #6 of 20 Old 12-28-2011, 01:05 PM
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I too just did a similar semi-bulletproofing on my 2006. EGR delete, new oil cooler after full coolant flush and turbo drain tubes with new 190deg T-Stat. After the change, running 65-70 on highway in 30-45 degree temperatures I'm seeing EOT steady at 189 and ECT at 182-184. I have to beat on her pretty hard to get coolant up to 190 and comes right back down and my oil only goes up to 193-194 and comes back down as well.

I confirmed my part number on the T-Stat from Motorcraft that was a 190deg so too am confused why my temps are lower than expected.

I also think that if my coolant temp would get up to 190 I would have a 3-5deg Delta but can't say for sure.

May install a grill cover to see if that changes things.

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post #7 of 20 Old 12-28-2011, 02:45 PM
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I thought the OEM T-stat was supposed to be 195 deg?

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post #8 of 20 Old 12-28-2011, 03:12 PM Thread Starter
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Yeah, My truck has always run on the cold side in the winter. It tended to hang out around 185-190 in the winter time. In the summer it will go 195, 200, or 200 plus a few.

Idahoser, good thought. I'll check in the morning after it sets all night.

It will be interesting to see what happens when spring/summer rolls around.

-Hemicbx
York, PA

2005 F350 CCLB Dually 4x4 Lariat 6.0L

Fixes:
Coolant flushed & DieselSite coolant filter
Blue spring
New OC & STC upgrade
Turbo lube tubes upgraded
Insight CS
BPD EGR Cooler
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post #9 of 20 Old 12-28-2011, 05:55 PM
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89C-104C

Quote:
Originally Posted by Arctic Fox View Post
I thought the OEM T-stat was supposed to be 195 deg?
Motorcraft thermostats are stamped 89-104C indicating the initial opening temperature of 89C (192.2F) and a fully opened position at 104C (219.2F).

Efficiency of the oil cooler is dependent upon engine load, ambient air temperature, humidity, barometric pressure, type of coolant, condition of coolant, type of oil, condition of oil, condition of oil cooler, condition of water pump, ad infinitum...but ultimately the operational range for effective oil cooling is indicated when the differential is below 15 degrees F when the truck is at operating temperature (in cold weather this may take more time than the 20-minutes ordinarily provided in warmer weather) on level ground at 55-65mph.

The temperature differential report is normal.

Enjoy more. Worry less.

Jonathan

Jonathan D. Howell
Lieutenant Colonel, U.S. Army

2005 EarthRoamer XV-LT (Ford F550)
"Americans Travelling America"
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post #10 of 20 Old 12-28-2011, 07:30 PM
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Quote:
Originally Posted by howell_jd View Post
Motorcraft thermostats are stamped 89-104C indicating the initial opening temperature of 89C (192.2F) and a fully opened position at 104C (219.2F).

Efficiency of the oil cooler is dependent upon engine load, ambient air temperature, humidity, barometric pressure, type of coolant, condition of coolant, type of oil, condition of oil, condition of oil cooler, condition of water pump, ad infinitum...but ultimately the operational range for effective oil cooling is indicated when the differential is below 15 degrees F when the truck is at operating temperature (in cold weather this may take more time than the 20-minutes ordinarily provided in warmer weather) on level ground at 55-65mph.

The temperature differential report is normal.

Enjoy more. Worry less.

Jonathan
Sorry to hijack but got any good Earthroamer pics to share? Saw one up close in Estes Park, CO couple of years ago and fell in love. Plan to own one at some point!

2006 F250 CC Short Bed
6.0L Powerstroke
SCT Tuner with Matt's awesome tunes
Upfitter Switches with High Idle mod & back up lights
EDAS engine damage avoidance system
EGR Delete, 4in MBRP Turbo Back Exhaust
New Oil Cooler 12/2011
Sinister Coolant Filter
2011 20" wheels
Black
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