Recommended readings - Temperature and Pressure
Junior User
Joined: Jun 2009
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Question about eot and ect.... I have a 06 with edge evo, and my ect is around 190 with eot 210. If these are within your ranges why does oil cooler need replacing? Are these temps near failure of the parts?? Would a flush help or do I need to go for oil cooler replacement?
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Fleet Owner
Joined: Nov 2003
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Your oil cooler is plugging up. Ford has determined if the oil temp minus the coolant temp exceeds 15 degrees, then the oil cooler is clearly restricting coolant flow. It is a simple issue of heat exchange. When working an engine hard, the coolant can easily get to 220 degrees. Even with the elevated temperature in the coolant, the oil temp still needs to be within 15 degrees (ie no more than 235 degrees).
Ford determined that this was a good way to identify when an oil cooler was plugging up and restricting coolant flow (it plugs up from particles in the coolant due to poor coolant maintenance practices, rust, excessive heat, etc). With this temperature difference (or delta), the oil cooler could be replaced BEFORE it failed. Also, replacing it when the 15 degree delta is reached can save your EGR cooler from failing since all of the coolant for the EGR cooler must first flow through the oil cooler.
Ford determined that this was a good way to identify when an oil cooler was plugging up and restricting coolant flow (it plugs up from particles in the coolant due to poor coolant maintenance practices, rust, excessive heat, etc). With this temperature difference (or delta), the oil cooler could be replaced BEFORE it failed. Also, replacing it when the 15 degree delta is reached can save your EGR cooler from failing since all of the coolant for the EGR cooler must first flow through the oil cooler.
Logistics Pro
Joined: Feb 2004
Posts: 4,460
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From: The Land Of Time
What Mark is telling you is that you are on your way to failure...you are already 5* outside fords recomendation at a 20* spread.
If you work that truck hard and depend on its reliability I would say you need more than a flush. Most people only see a 6-8* spread unlaoded at highway speeds.
Sarge
If you work that truck hard and depend on its reliability I would say you need more than a flush. Most people only see a 6-8* spread unlaoded at highway speeds.
Sarge
Logistics Pro
Joined: Feb 2004
Posts: 4,460
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From: The Land Of Time
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Lead Driver
Joined: Jul 2004
Posts: 6,950
Likes: 510
From: Foothills, CA
Your oil cooler is plugging up. Ford has determined if the oil temp minus the coolant temp exceeds 15 degrees, then the oil cooler is clearly restricting coolant flow. It is a simple issue of heat exchange. When working an engine hard, the coolant can easily get to 220 degrees. Even with the elevated temperature in the coolant, the oil temp still needs to be within 15 degrees (ie no more than 235 degrees).
Ford determined that this was a good way to identify when an oil cooler was plugging up and restricting coolant flow (it plugs up from particles in the coolant due to poor coolant maintenance practices, rust, excessive heat, etc). With this temperature difference (or delta), the oil cooler could be replaced BEFORE it failed. Also, replacing it when the 15 degree delta is reached can save your EGR cooler from failing since all of the coolant for the EGR cooler must first flow through the oil cooler.
Ford determined that this was a good way to identify when an oil cooler was plugging up and restricting coolant flow (it plugs up from particles in the coolant due to poor coolant maintenance practices, rust, excessive heat, etc). With this temperature difference (or delta), the oil cooler could be replaced BEFORE it failed. Also, replacing it when the 15 degree delta is reached can save your EGR cooler from failing since all of the coolant for the EGR cooler must first flow through the oil cooler.
Share some wisdom, would you Mark?
Logistics Pro
Joined: Feb 2004
Posts: 4,460
Likes: 14
From: The Land Of Time
Dan your spot on,
I assumed that the other poster was just going down the road no load. You know what happens when I assume.
You are also correct you need a good baseline as well, so after a cold soak you should be within a few degrees for sure if your sensors are good.
Like I say my truck unloaded at highway speeds, 74 mph, my spread is between 6-8* and that is what I see pretty much all the time. Last year around 4th of July pulling my 13k 5er, I was less that 11* all the time even up grades and the temp was between 92-110* ambient temps.
So I would say unloaded with a 20* spread...you have problems that need to be addressed.
Sarge
I assumed that the other poster was just going down the road no load. You know what happens when I assume.
You are also correct you need a good baseline as well, so after a cold soak you should be within a few degrees for sure if your sensors are good.
Like I say my truck unloaded at highway speeds, 74 mph, my spread is between 6-8* and that is what I see pretty much all the time. Last year around 4th of July pulling my 13k 5er, I was less that 11* all the time even up grades and the temp was between 92-110* ambient temps.
So I would say unloaded with a 20* spread...you have problems that need to be addressed.
Sarge
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Fleet Owner
Joined: Nov 2003
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Ford's recommended procedure is actually to perform a "careful" WOT run to achieve maximum boost (after properly warming up the engine).
Most people have "adopted" the practice of a 65 mph run on level ground (again, after proper engine warm-up).
IMO - if you exceed 15 degrees EITHER way, you have a plugged oil cooler and should not ignore it.
Most people have "adopted" the practice of a 65 mph run on level ground (again, after proper engine warm-up).
IMO - if you exceed 15 degrees EITHER way, you have a plugged oil cooler and should not ignore it.
Lead Driver
Joined: Jul 2004
Posts: 6,950
Likes: 510
From: Foothills, CA
Ford's recommended procedure is actually to perform a "careful" WOT run to achieve maximum boost (after properly warming up the engine).
Most people have "adopted" the practice of a 65 mph run on level ground (again, after proper engine warm-up).
IMO - if you exceed 15 degrees EITHER way, you have a plugged oil cooler and should not ignore it.
Most people have "adopted" the practice of a 65 mph run on level ground (again, after proper engine warm-up).
IMO - if you exceed 15 degrees EITHER way, you have a plugged oil cooler and should not ignore it.
Not exactly what I was hoping to hear since I just got Torque running and did the cold soak test and on a cool day (60s) I was seeing 10 deg deltas up a mild grade with light throttle...
Oh well, next warm day I'll try the real test -- any idea on the Ford test how long to hold WOT?
Next I'll be joining my local FTE chapter to find a good local wrench
and help here