203* T stat?
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Cargo Master
Joined: Jan 2009
Posts: 2,800
Likes: 31
From: OKC, OK
Would have taken you up on that but I already ordered. Want to be ready when the water pump bites it.
Elder User
Joined: May 2008
Posts: 860
Likes: 2
From: Liberty Lake, WA
Cancel your order.
You do realize that while this t-stat raises your coolant temps, its also going to raise your engine oil temps. You have a little sensor on your truck called an EOT sensor (Engine Oil Temp). EOT's are tied into the PCM and will affect a number of things to include fueling. This will throw off all your fuel tables. I've seen oil temps as high as 250* with one of these T-stats.
I agree with Joe, Bob makes and sells alot of great products.. This isn't one of them.
You do realize that while this t-stat raises your coolant temps, its also going to raise your engine oil temps. You have a little sensor on your truck called an EOT sensor (Engine Oil Temp). EOT's are tied into the PCM and will affect a number of things to include fueling. This will throw off all your fuel tables. I've seen oil temps as high as 250* with one of these T-stats.
I agree with Joe, Bob makes and sells alot of great products.. This isn't one of them.
Fleet Mechanic
Joined: Aug 2010
Posts: 1,456
Likes: 155
From: Sedalia, CO
Mark
Logistics Pro
Joined: May 2011
Posts: 4,832
Likes: 668
From: Maine
Cancel your order.
You do realize that while this t-stat raises your coolant temps, its also going to raise your engine oil temps. You have a little sensor on your truck called an EOT sensor (Engine Oil Temp). EOT's are tied into the PCM and will affect a number of things to include fueling. This will throw off all your fuel tables. I've seen oil temps as high as 250* with one of these T-stats.
I agree with Joe, Bob makes and sells alot of great products.. This isn't one of them.
You do realize that while this t-stat raises your coolant temps, its also going to raise your engine oil temps. You have a little sensor on your truck called an EOT sensor (Engine Oil Temp). EOT's are tied into the PCM and will affect a number of things to include fueling. This will throw off all your fuel tables. I've seen oil temps as high as 250* with one of these T-stats.
I agree with Joe, Bob makes and sells alot of great products.. This isn't one of them.
Yeah, only 20* hotter than OEM. Really NOT a big deal. If you saw 250* temps.... something else was wrong. I have run my truck HARD and never saw close to those temps. Both Towing and a series of WOT runs. I don't think it ever got above 220*.
And make all the claims you want... it works great for plenty of people. In my experience, IF it effected fuel economy, it was positively, my temps are fine, and the truck DOES run better, especially in the cold.
Elder User
Joined: May 2008
Posts: 860
Likes: 2
From: Liberty Lake, WA
Yeah, only 20* hotter than OEM. Really NOT a big deal. If you saw 250* temps.... something else was wrong. I have run my truck HARD and never saw close to those temps. Both Towing and a series of WOT runs. I don't think it ever got above 220*.
And make all the claims you want... it works great for plenty of people. In my experience, IF it effected fuel economy, it was positively, my temps are fine, and the truck DOES run better, especially in the cold.
And make all the claims you want... it works great for plenty of people. In my experience, IF it effected fuel economy, it was positively, my temps are fine, and the truck DOES run better, especially in the cold.
I'm not making any "claims", I've been around these trucks along time. I just reporting factual data that I have personally seen. I think if the hotter the better theory works, why not go to a 210* t-stat?
Logistics Pro
Joined: May 2011
Posts: 4,832
Likes: 668
From: Maine
I would agree that something else was wrong when we saw 250* temps, until pulling in the shop and putting a stock one back on the same day and have the temps drop down to 197* .. The only thing we changed was a T-stat.
I'm not making any "claims", I've been around these trucks along time. I just reporting factual data that I have personally seen. I think if the hotter the better theory works, why not go to a 210* t-stat?
I'm not making any "claims", I've been around these trucks along time. I just reporting factual data that I have personally seen. I think if the hotter the better theory works, why not go to a 210* t-stat?
Postmaster
Joined: Jul 2006
Posts: 4,993
Likes: 2
From: Bend, OR
Not the 300+ most of us run at the rear wheels.
195* is mobetta...
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9 ECHO 1
Joined: Aug 2009
Posts: 12,467
Likes: 58
From: Missouri
Besides, the T444E runs at a much lower HP rating level even if both the 7.3 and the T444E are stock.. So when we start boosting our numbers it doesnt help much
Post Fiend
Joined: Feb 2002
Posts: 10,600
Likes: 3
From: Carhenge
Ahhhhhh, the same silly arguments.
Remember, 203* is the temperature that the thermostat is fully open. So once your coolant gets above 203*, the thermostat is irrelevant.
The cooling system should dissipate the same BTU's regardless of base temperature. A properly functioning cooling system can either handle the heat the engine is generating or it can't. If you have ever broken a fan belt under load, you know that a 8* difference in reserve cooling capacity is meaningless. It's all about capacity to remove BTU's.
Remember, 203* is the temperature that the thermostat is fully open. So once your coolant gets above 203*, the thermostat is irrelevant.
The cooling system should dissipate the same BTU's regardless of base temperature. A properly functioning cooling system can either handle the heat the engine is generating or it can't. If you have ever broken a fan belt under load, you know that a 8* difference in reserve cooling capacity is meaningless. It's all about capacity to remove BTU's.
Post Fiend
Joined: Sep 2003
Posts: 6,096
Likes: 26
From: Mesa AZ
Ahhhhhh, the same silly arguments.
Remember, 203* is the temperature that the thermostat is fully open. So once your coolant gets above 203*, the thermostat is irrelevant.
The cooling system should dissipate the same BTU's regardless of base temperature. A properly functioning cooling system can either handle the heat the engine is generating or it can't. If you have ever broken a fan belt under load, you know that a 8* difference in reserve cooling capacity is meaningless. It's all about capacity to remove BTU's.
Remember, 203* is the temperature that the thermostat is fully open. So once your coolant gets above 203*, the thermostat is irrelevant.
The cooling system should dissipate the same BTU's regardless of base temperature. A properly functioning cooling system can either handle the heat the engine is generating or it can't. If you have ever broken a fan belt under load, you know that a 8* difference in reserve cooling capacity is meaningless. It's all about capacity to remove BTU's.
Tuned
Joined: Oct 2011
Posts: 282
Likes: 0
I may have got a defective unit and my testing method my not be very scientific, but I won't be putting one in my truck. Side by side the stock unit worked perfectly and the 203* unit didn't even open an 1/8 of an inch in boiling water.
The last picture in that thread was after the water was boiling for about 10 minutes. I turned down the flame just to take the picture. As you can see in the picture, the 203* unit barely even opened.
Post Fiend
Joined: Feb 2002
Posts: 10,600
Likes: 3
From: Carhenge
Here is the link I posted in post #8. https://www.ford-trucks.com/forums/1...nd-answer.html
I may have got a defective unit
I may have got a defective unit
I think you used good methods assuming you had a thermometer in the water, you should always check a new thermostat by this method for proper function before you put it in.
Tuned
Joined: Oct 2011
Posts: 282
Likes: 0
I used a digital cooking thermometer to get the temps and the factory unit opened right at 195* according to the thermometer. My biggest issue was seeing the two units side by side and the 203 barely even opening.
I think it is a good idea to always check a new thermostat before putting into the vehicle. Imagine if I would have installed the 203 in my truck and it was never really opening? With only the factory engine coolant gauge that doesn't tell you much, and expecting the new 203 should make it run hotter, it could have run pretty hot before realizing there was a problem.
I am curious if anyone else has put one in a pot of boiling water to see how much theirs opens.
I think it is a good idea to always check a new thermostat before putting into the vehicle. Imagine if I would have installed the 203 in my truck and it was never really opening? With only the factory engine coolant gauge that doesn't tell you much, and expecting the new 203 should make it run hotter, it could have run pretty hot before realizing there was a problem.
I am curious if anyone else has put one in a pot of boiling water to see how much theirs opens.
Post Fiend
Joined: Feb 2002
Posts: 10,600
Likes: 3
From: Carhenge
I used a digital cooking thermometer to get the temps and the factory unit opened right at 195* according to the thermometer. My biggest issue was seeing the two units side by side and the 203 barely even opening.
I think it is a good idea to always check a new thermostat before putting into the vehicle. Imagine if I would have installed the 203 in my truck and it was never really opening? With only the factory engine coolant gauge that doesn't tell you much, and expecting the new 203 should make it run hotter, it could have run pretty hot before realizing there was a problem.
I am curious if anyone else has put one in a pot of boiling water to see how much theirs opens.
I think it is a good idea to always check a new thermostat before putting into the vehicle. Imagine if I would have installed the 203 in my truck and it was never really opening? With only the factory engine coolant gauge that doesn't tell you much, and expecting the new 203 should make it run hotter, it could have run pretty hot before realizing there was a problem.
I am curious if anyone else has put one in a pot of boiling water to see how much theirs opens.