Re: Cold running T SAT
Lead Driver
Joined: Feb 2011
Posts: 8,241
Likes: 155
From: L.A. (Lower Alabama)
With high temps only in the very low 30's I could get 188 on the highway but at a stop light it would drop into the 170's. Talk about sucking fuel.....
I'm also doing a cold soak study on my sensors as they seem to be off but they match each other exactly on cold starts. After 16 hours they are 10* higher than ambient...
I'm also doing a cold soak study on my sensors as they seem to be off but they match each other exactly on cold starts. After 16 hours they are 10* higher than ambient...
.John;
Did you put the cardboard behind the grill, up from the bottom? Did you use any attaching hardware or did it just stay in place?
Weather here today is a warm 58 with rain and the garage is full of other projects so climbing under the truck isn't an option. I have to work tomorrow so it looks like a goof-off day for me
hmm, maybe a nice nap.
FTE Leadership Emeritus
Joined: Sep 2003
Posts: 12,258
Likes: 770
From: Houston, Texas
It does because with the truck cold, it doesn't burn the fuel as well Because it's not getting as hot as it needs to.
I had this problem earlier this month when my truck would hang around 180 and never get hotter. My mileage suffered and the truck could het out of its own way, but as soon as I swapped in a new Motorcraft thermostat, I easily saw 190+ engine oil and coolant temps. My truck now runs noticeably better now that it gets up to the temp international and Ford meant for it.
I had this problem earlier this month when my truck would hang around 180 and never get hotter. My mileage suffered and the truck could het out of its own way, but as soon as I swapped in a new Motorcraft thermostat, I easily saw 190+ engine oil and coolant temps. My truck now runs noticeably better now that it gets up to the temp international and Ford meant for it.
Postmaster
Joined: Jul 2011
Posts: 3,263
Likes: 0
From: Houston, TX
It does because with the truck cold, it doesn't burn the fuel as well Because it's not getting as hot as it needs to. I had this problem earlier this month when my truck would hang around 180 and never get hotter. My mileage suffered and the truck could het out of its own way, but as soon as I swapped in a new Motorcraft thermostat, I easily saw 190+ engine oil and coolant temps. My truck now runs noticeably better now that it gets up to the temp international and Ford meant for it.
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Lead Driver
Joined: Oct 2010
Posts: 5,420
Likes: 16
From: Ouray, CO
I was amazed the coolant remained normal. I was planning to stop and remove the FIA when temps got higher, but i never did.
Made me realize how effective the cooling system is on the 6l.
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Fleet Owner
Joined: Apr 2012
Posts: 27,307
Likes: 549
From: Spanaway
Well I am running with cardboard and it between the intercooler and the
radiator. It's a fairly full fit. So not that much air is getting around.
I picked up some plastic board that I will replace the paper cardboard with.
The next one will have some space for air to get around a bit more.
Sean
BTW : As soon as I was off the throttle the temps dropped fast.
radiator. It's a fairly full fit. So not that much air is getting around.
I picked up some plastic board that I will replace the paper cardboard with.
The next one will have some space for air to get around a bit more.
Sean
BTW : As soon as I was off the throttle the temps dropped fast.
Posting Guru
Joined: Sep 2009
Posts: 1,739
Likes: 0
From: Virginia beach, VA
So is the correct place in between the radiator and intercooler? I have mine behind the grille and it does absolutely nothing. Temps are still 182-184
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Fleet Owner
Joined: Apr 2012
Posts: 27,307
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From: Spanaway
The reason I placed mine there was to help keep to dry and
to see if I could keep air moving over the transmission, power
steering coolers, the condenser and intercooler.
Now that I have a large enough plastic board section I am going
to replace it with that and not have to worry about it getting wet.
Sean
to see if I could keep air moving over the transmission, power
steering coolers, the condenser and intercooler.
Now that I have a large enough plastic board section I am going
to replace it with that and not have to worry about it getting wet.
Sean
Lead Driver
Joined: Feb 2011
Posts: 8,241
Likes: 155
From: L.A. (Lower Alabama)
38* outside this morning. Truck made it to 184. Exact same drive, same temp leaving the driveway. Coming home @ 52* it was 184* Thermostat is what 2weeks old? I just don't get it. 
It seems like that one cold morning changed it's value somehow.
It seems like that one cold morning changed it's value somehow.
Elder User
Joined: Apr 2013
Posts: 941
Likes: 0
From: Bothell, WA
Is 3-5 degrees a real problem? In the 40's-50's here now, and truck runs at 185- 187*f. These are the same temps I was getting on my trip from Montana in 20*f weather too. This T stat is only 2months old, are the quality of parts that hit or miss? All the big trucks seem to have removed their cold weather gear, but my little 6l seems to need extra pampering I guess?
Lead Driver
Joined: Feb 2011
Posts: 8,241
Likes: 155
From: L.A. (Lower Alabama)
To be honest I don't know, but I think it might. Out of the box this thermostat was 191*. So that's 6* difference just 2 weeks after install. It was a rather inexpensive looking part (think I posted pictures earlier).
I do know my truck runs better the hotter it gets. A couple summers ago, before oil and EGR cooler change, temps would go way up. It seemed to run stronger the hotter it got but of course overheating isn't good either. I'd be happy if it stayed around 195*.
I do know my truck runs better the hotter it gets. A couple summers ago, before oil and EGR cooler change, temps would go way up. It seemed to run stronger the hotter it got but of course overheating isn't good either. I'd be happy if it stayed around 195*.
Senior User
Joined: Jun 2013
Posts: 172
Likes: 0
From: Lake County, OH
I just drove into work. It's a nice 15 degrees out there. Truck never made it over 186 and the oil over 191. I think this is just the nature of the beast.
I had a thought, haven't checked into it yet. I remember years ago (many years ago) that there used to be inline thermostats for the radiator hose. If they still made those why couldn't we just take the stock one out and put one in the upper radiator hose? The downside is that we have to cut the hose and it adds 2 more places for a leak to happen.
I had a thought, haven't checked into it yet. I remember years ago (many years ago) that there used to be inline thermostats for the radiator hose. If they still made those why couldn't we just take the stock one out and put one in the upper radiator hose? The downside is that we have to cut the hose and it adds 2 more places for a leak to happen.
FTE Leadership Emeritus
Joined: Sep 2003
Posts: 12,258
Likes: 770
From: Houston, Texas
As long as your oil temps reach a healthy 190, I would think you're good to go. My truck seems quite happy once the oil temps get to 180, but even better when the oil temps reach 190. Water temps rarely jump above 188 unless I'm on it.
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Logistics Pro
Joined: Mar 2013
Posts: 4,097
Likes: 23
From: Kissimmee,Fla
I think it's the nature of the beast,there is a lot of coolant to warm up. That's a lot of calories to produce. I think there is more to this thou, the stat "should" keep the temps up, It does in my gasser and that has the extra big radiator for towing,it think it's the design of the stat myself....but I've been wrong before