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03-08-2021, 06:24 AM
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#1
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1 Rivet Member
2016 25' Flying Cloud
San Mateo
, California
Join Date: Sep 2018
Posts: 5
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Ecoboost 3.5 Engine temp while towing uphill
Hi All~
I have a 2017 F150 Lariat with max tow package and tow a 25' Airstream (5.5k trailer weight and drive and steer axles under spec from CAT scale). Temp gauge on recent hill accent (6% grade for 2 miles) shows 226 degrees and outside temp in 50's. I was driving in tow haul at 50 mph and 2500 RPM's. For all the F-150 owners out there, is this abnormally high or within range?
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03-08-2021, 10:26 AM
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#2
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2 Rivet Member
2009 23' International
2020 27' Globetrotter
GREENSBURG
, PA
Join Date: Sep 2019
Posts: 78
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I too have a 2017 Lariat Max Tow with 3.5 Eco / 10 speed. I tow a 27fb GT. On humid 90 plus degree days, the long steeper hills can have me at 240 degrees. I have tried running higher RPMs to circulate more coolant and use less boost which may help marginally. Doesn't seem to be an issue, I see many of these trucks with much higher miles than I will ever see that were used for towing.
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03-08-2021, 11:12 AM
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#3
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Rivet Master
2013 31' Classic
billings
, Montana
Join Date: Feb 2010
Posts: 3,577
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Yep my 6.7ram cruises with our 31’ Classic..on a hot day. 194...degrees...
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03-08-2021, 11:21 AM
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#4
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4 Rivet Member
1977 31' Excella 500
Spring
, Texas
Join Date: Apr 2020
Posts: 274
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Try running higher RPM's and see if that will help. Loading a turbo'd motor at lower RPM's creates a lot of heat. Another cheap thing to try is run a cooler thermostat. That helped majorly with my last truck when towing.
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03-08-2021, 02:04 PM
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#5
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Rivet Master
2020 23' Flying Cloud
2019 22' Sport
Sebastian
, Florida
Join Date: Nov 2019
Posts: 1,235
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Just to be clear, is that the engine or transmission temperature? The V8 only has a gauge for engine temp, but a gauge and digital readout for the transmission. My transmission runs 195 to 205 F, 215 when pushed, but my trailer is smaller and I haven’t had it out west yet. It seems to run hotter in the lower gears, but you’ve got to get up that hill!
__________________
-Don
(That man in that tiny can)
(Same man, Bigger can)
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03-08-2021, 02:21 PM
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#6
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Rivet Master
2017 28' Flying Cloud
2014 25' FB Flying Cloud
2008 25' Safari FB SE
Georgetown (winter)Thayne (summer)
, Texas & Wyoming
Join Date: Jan 2007
Posts: 6,692
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Quote:
Originally Posted by cyclecrazy
Hi All~
I have a 2017 F150 Lariat with max tow package and tow a 25' Airstream (5.5k trailer weight and drive and steer axles under spec from CAT scale). Temp gauge on recent hill accent (6% grade for 2 miles) shows 226 degrees and outside temp in 50's. I was driving in tow haul at 50 mph and 2500 RPM's. For all the F-150 owners out there, is this abnormally high or within range?
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My 2014 F150 Platinum EB model would heat up towing my 25' AS going up grades outside Vegas all the time at 60+mph...I would have to slow down to 45 in the truck lane to get it to come down...but it was hot out also...that engine runs hot with the turbo engaged. Brakes also can be an issue with the 25' going down steep grades, so be careful there...the 25' is a heavy trailer. Your seeing an example of why many of us have upgraded to the 3/4T-1T with the turbo diesels in 25 or larger AS's.
__________________
Empty Nesters; Gypsies on the road! 2017 28' Twin Flying Cloud
2017 F250 King Ranch, 4X4, 6.7L, Blue-Ox WDH
Summer-Star Valley Ranch RV Resort (Thayne, WY); Winter-Sun City (Georgetown,TX)
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03-08-2021, 06:53 PM
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#7
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1 Rivet Member
2016 23' Flying Cloud
San Mateo
, California
Join Date: Jul 2009
Posts: 18
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Quote:
Originally Posted by GetawA-S
Just to be clear, is that the engine or transmission temperature? The V8 only has a gauge for engine temp, but a gauge and digital readout for the transmission. My transmission runs 195 to 205 F, 215 when pushed, but my trailer is smaller and I haven’t had it out west yet. It seems to run hotter in the lower gears, but you’ve got to get up that hill!
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I am addressing engine temp. Thanks for your reply
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03-08-2021, 07:51 PM
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#8
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Rivet Master
2021 30' Flying Cloud
2020 25' International
minneapolis
, Minnesota
Join Date: Jun 2020
Posts: 1,468
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My 2019 limited runs about the same temp.
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03-08-2021, 07:51 PM
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#9
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Rivet Master
2017 28' International
Jim Falls
, Wisconsin
Join Date: Jul 2017
Posts: 2,311
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I have never seen my temp gauge go up on my F150 while towing. Seems to stay pretty constant.
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03-08-2021, 07:57 PM
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#10
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Lost in America
2015 27' FB International
2006 25' Safari FB SE
2004 19' International CCD
Santa Fe
, New Mexico
Join Date: Feb 2007
Posts: 2,156
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Yep, in the mountains they run very hot. Engine, tranny and brakes. Wait till it drops into the limp mode at the worst time. Traded my ecoboost for a 3/4 diesel.
__________________
This is the strangest life I've ever known - J. Morrison
2015 Airstream International Serenity 27FB
2017 Chevy Silverado 2500HD Duramax Diesel
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03-09-2021, 12:54 AM
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#11
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Rivet Master
Commercial Member
2019 27' Tommy Bahama
London
, Ontario
Join Date: Aug 2007
Posts: 1,347
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I would agree with the others that suggest manually shifting to keep the RPM higher. I find with most boosted engines keeping rpm higher improved mileage and really reduces exhaust temperatures etc. If climbing a 6% grade keep it over 3000 RPM. Similar highway cruising in the low to mid 2000’s.
__________________
Andrew Thomson London, Ontario
"One test is worth a thousand expert opinions." Tex Johnston, Boeing 707 test pilot
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03-09-2021, 10:02 AM
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#12
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1 Rivet Member
2018 19' Flying Cloud
Tumwater
, Washington
Join Date: Mar 2020
Posts: 14
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I had a 2016 F150 3.5 multi fuel that pulled a 19’ AS with no problem except for a long climb out of Jackson Hole, WY over the Rockies. In this case, I had significant engine temp increase (but within acceptable range) and barely sufficient pulling power. I’ve since moved to a F150 2.7L eco boost pulling a larger 23’ AS with power to spare and an engine temp needle that barely moves irrespective of conditions.
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03-09-2021, 10:23 AM
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#13
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3 Rivet Member
2017 27' International
Currently Looking...
Antes Fort
, Pennsylvania
Join Date: Jul 2016
Posts: 166
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This crap has happened to me several times and I got the frightening 'engine powering down' message. I have managed to survive obviously. But since then I have avoided long steep climbs. As suggested here, exactly how do I up the RPMs to get out of this situation?
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03-09-2021, 11:36 AM
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#14
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Rivet Master
2002 30' Classic S/O
Garden Valley
, Idaho
Join Date: Jul 2010
Posts: 1,631
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Quote:
Originally Posted by cyclecrazy
Hi All~
I have a 2017 F150 Lariat with max tow package and tow a 25' Airstream (5.5k trailer weight and drive and steer axles under spec from CAT scale). Temp gauge on recent hill accent (6% grade for 2 miles) shows 226 degrees and outside temp in 50's. I was driving in tow haul at 50 mph and 2500 RPM's. For all the F-150 owners out there, is this abnormally high or within range?
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I highly recommend the Mike's 5 Star 89 octane performance/tow programmer, the Transgo shift kit, magnaflow exhaust system and AFE intake system. The more airflow into your turbo, the cooler it will run.
__________________
2008 F-250 4X4 Lariat V-10
2002 Airstream Classic 30' w/SO #2074
2007 Kubota 900 RTV
1996 Ford Bronco
2007 Lincoln LT
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03-09-2021, 06:30 PM
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#15
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Rivet Master
2008 27' Safari FB SE
Miami
, Florida
Join Date: Feb 2004
Posts: 3,138
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Quote:
Originally Posted by alphamale49
This crap has happened to me several times and I got the frightening 'engine powering down' message. I have managed to survive obviously. But since then I have avoided long steep climbs. As suggested here, exactly how do I up the RPMs to get out of this situation?
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Downshift manually until you get the rpm you want.
__________________
Sorta new (usually dirty) Nissan Titan XD (hardly paid for)
Middle-aged Safari SE
Young, lovely bride
Dismissive cat
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03-10-2021, 04:24 PM
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#16
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:SPACE A" S/O 11 Air19745
2006 34' Classic S/O
Fort Worth
, Texas
Join Date: Feb 2007
Posts: 1,766
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This sounds contra, but I have studied cases where the coolant is pumped so fast through the radiator it does not have enough time to exchange the heat out the radiator. Hence, high coolant temps. I think that was the case with Ford early diesels.
guskmg
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03-10-2021, 05:04 PM
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#17
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2 Rivet Member
Houston
, Texas
Join Date: Jan 2015
Posts: 37
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Quote:
Originally Posted by guskmg
This sounds contra, but I have studied cases where the coolant is pumped so fast through the radiator it does not have enough time to exchange the heat out the radiator. Hence, high coolant temps. I think that was the case with Ford early diesels.
guskmg
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I’ve seen that mentioned before, but wouldn’t the coolant also gain less heat from the engine and be a net zero?
Edit to add: I have a 2010 F250 diesel and am following the Ecoboost threads with interest because the new Pro Power Onboard in the F150’s seems to address all of our issues with camping in the south in the summer!
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03-10-2021, 07:44 PM
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#18
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Rivet Master
2017 23' Flying Cloud
Bartlett
, Tennessee
Join Date: Apr 2017
Posts: 1,057
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Quote:
Originally Posted by WayneS
I’ve seen that mentioned before, but wouldn’t the coolant also gain less heat from the engine and be a net zero?
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Wouldn't pulling less heat from the engine contribute to the engine running hotter? It seems like the coolant pulling less heat from the engine and transferring less heat out the radiator both would contribute to engine overheating.
__________________
Bobbo and Lin
2017 F-150 XLT 4x4 SuperCab 3.5l EcoBoost V6
2017 Flying Cloud 23FB "BobLin Along"
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03-10-2021, 08:01 PM
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#19
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Rivet Master
2013 27' FB International
El Dorado Hills
, California
Join Date: Jan 2013
Posts: 2,023
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This is a known issue for this model year. I also have a 2017 F150 ecoboost 10 speed transmission. Yes, on long steep grades, especially at altitude above 5,000 feet on hot days with the A/C on it overheats. It has overheated to.the point where computer turns off the turbo and power drops a lot for a few minutes. Since I have an extended warranty I just floor it and forge ahead. Will sell it when the warranty expires.
My friend has a 2019 F150 ecoboost, we towed together to the same campground and he didn't have any temperature issue. So maybe newer models have this problem fixed.
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03-11-2021, 06:04 AM
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#20
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Rivet Master
1966 17' Caravel
1972 21' Globetrotter
SW
, Missouri
Join Date: Aug 2020
Posts: 701
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Quote:
Originally Posted by Joe15601
I too have a 2017 Lariat Max Tow with 3.5 Eco / 10 speed. I tow a 27fb GT. On humid 90 plus degree days, the long steeper hills can have me at 240 degrees. I have tried running higher RPMs to circulate more coolant and use less boost which may help marginally. Doesn't seem to be an issue, I see many of these trucks with much higher miles than I will ever see that were used for towing.
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Probably better for a new thread, but how many are people putting on these motors?
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