ECT vs EOT Question....
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Junior User
Joined: Jun 2010
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From: Glen Rock, PA
ECT vs EOT Question....
Hey all....
I've made a couple posts in reference to a 2004 F-350 6.0 6sp I recently purchased. I've had the truck less than a month and am still working to get a solid "baseline" on it.... it shows 66,xxx on the clock.
So far it's looking very solid, and has checked out in just about every way. I've been focusing on the coolant lately and just installed a coolant filter. I had the system tested for combustion by-products in the coolant with none found. There are no leaks and it maintains level fine.
I just added a scanguageII to watch ECT vs EOT. I've read up on the normal ranges and also about the 15* split. I'm seeing ECT between 188-202 and with EOT between 194-214 under various driving conditions. The split normally runs anywhere from 7 to 12 degrees but I have seen splits of up to 22* when running hard. (ECT 192 / EOT 214)
Being all temps are within normal operating range, should I be concerned with the larger temp splits when running hard, or is this normal?
I've made a couple posts in reference to a 2004 F-350 6.0 6sp I recently purchased. I've had the truck less than a month and am still working to get a solid "baseline" on it.... it shows 66,xxx on the clock.
So far it's looking very solid, and has checked out in just about every way. I've been focusing on the coolant lately and just installed a coolant filter. I had the system tested for combustion by-products in the coolant with none found. There are no leaks and it maintains level fine.
I just added a scanguageII to watch ECT vs EOT. I've read up on the normal ranges and also about the 15* split. I'm seeing ECT between 188-202 and with EOT between 194-214 under various driving conditions. The split normally runs anywhere from 7 to 12 degrees but I have seen splits of up to 22* when running hard. (ECT 192 / EOT 214)
Being all temps are within normal operating range, should I be concerned with the larger temp splits when running hard, or is this normal?
I'm hitting easy street
Joined: Nov 2009
Posts: 6,395
Likes: 27
From: Central Oregon
Look at the spread when you are cruising the highway at operating range to get an accurate reading. Constant at what ever your highway speeds are.
Hold at that speed and read.
"Various driving conditions" can be a big difference.
Hold at that speed and read.
"Various driving conditions" can be a big difference.
Hotshot
Joined: Dec 2003
Posts: 15,369
Likes: 121
From: Stuttgart, Ar
I don't think your temps are that bad but you might want to try a VC-9 flush as your oil temp split is marginal. I know some say anything over 15* is bad but I look at how high the oil temp gets too. Nothing wrong with 214 EOT under any conditions, but it is winter time and your temps are very likely to go higher in the summer. The concern is lack of coolant flow to the EGR cooler causing it to leak and hydrolock a cylinder. If the VC9 flush doesn't reduce the split then be prepared to replace your oil cooler before you also loose your EGR cooler. BTW.....do you know if you have an 03 or 04 motor in your truck? It could be either -- 03 motor in trucks produced before 9/29/03.
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Junior User
Joined: Jun 2010
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From: Glen Rock, PA
The door sticker dates the truck at 02/04 and the engine sticker also says 2004.
I am definately planning on a VC-9 flush and am very curious to see if it makes a difference. What is an average split for daily driving without a load?
I am definately planning on a VC-9 flush and am very curious to see if it makes a difference. What is an average split for daily driving without a load?
Hotshot
Joined: Dec 2003
Posts: 15,369
Likes: 121
From: Stuttgart, Ar
I plead the 5th since I have a bulletproof setup--mine is different. I've seen everything from no split up but normally about 5-8 degrees is what I see posted most.
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Junior User
Joined: Jun 2010
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From: Glen Rock, PA
I'm weighing my options as far as replacing the coolers vs the EGR system delete.... I'm not much of a mods guy, but am looking for longevity. I want to do what would be best for the "long run" and it seems there's a ton of debate on the topic.
First however, we'll see what the VC-9 flush does, I guess there's no reason to poke it with a stick if it's not broke! LOL
First however, we'll see what the VC-9 flush does, I guess there's no reason to poke it with a stick if it's not broke! LOL
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Posting Guru
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From: Green Lane, Pa.
My temp split this time of the year is 45-50 mph no load, 2-3 deg difference at 70 mph it goes up to 5 deg spread. In the summer at the same speeds they will be about another 3 deg more.
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Junior User
Joined: Jun 2010
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From: Glen Rock, PA
Thanks gang...
From what I can tell my splits are a little high but everything is within range. From browsing the maintenance records, I don't believe the coolant system has ever been flushed. We'll see where that gets me and I'll follow up.....
From what I can tell my splits are a little high but everything is within range. From browsing the maintenance records, I don't believe the coolant system has ever been flushed. We'll see where that gets me and I'll follow up.....
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