Mark...as a quicky, do you happen to have the temps inside the differential?

 

No, I do not - sorry Bud.

 

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?

 

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.

 

Ok, I understand now... so as long as oil temp doesn't get crazy high its not gonna fail? I'm gonna try a good flushing first and go from there.

Thanks!

 

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

 

+1 Sarge !

 

How Ya Been Mark

 

I've got a question: Somewhere I read that you should check this EOT/ECT delta after a good half hour of warm up driving and then at a cruise unloaded down the hiway at 65. That implied to me that you might see higher delta spikes in more extreme conditions that might be ok? But if you're getting higher than 15 deg doing the above procedure, you got plugging for-sure. Oh yeah and another was to 1st check your temps after a good 12+ hour cold soak to be sure the sensors themselves aren't reporting bad numbers (they should be close to the same)...

Share some wisdom, would you Mark?

 

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

 

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.

 

See how Urban Legends and Old Wives Tales get started...?!

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

 

The procedure just says to achieve maximum boost. By that, I would think 26-28 psig would do it. One of the Techs might have more help than that (hopefully).

 

Thank You Mark, I will add those values to my scan gauge notes, thanks for all the hard work and help here reps ur way

 

I haven't been able to give Mark reps for years. I'm about at the point of just handing them out to all the newbs just so I can give some to those that help us the most...