EOT/ ECT Large Differential
Thread Starter
|
Junior User
Joined: Mar 2010
Posts: 66
Likes: 0
I ordered the dfuser external coolant filter yesterday,, eta 2-3 days. I will put it in and let you know, will keep you informed of the progress.
If the original oil cooler make it 110,000 or so, and after cleaning the coolant system to where the water was crystal clear,,, it seems strange that the coolant side of the cooler or egr could be plugged. But At this point it is the next step. So we shall see. At least I am improving my mechanical skills.
Thanks to all
If the original oil cooler make it 110,000 or so, and after cleaning the coolant system to where the water was crystal clear,,, it seems strange that the coolant side of the cooler or egr could be plugged. But At this point it is the next step. So we shall see. At least I am improving my mechanical skills.
Thanks to all
Post Fiend
Joined: Jul 2005
Posts: 6,127
Likes: 6
It is not unusual at all to have casting sand still an issue after 110,000 miles --- especially if the engine was not run hard then run run hard.
If you get casting sand in the filter, assume the oil / egr cooler has gone again, and keep running the filter until it is reasonably clean --- then do the cooler /egr and flush again.
Be sure you do VC-9 and follow the flush instructions exactly.
If you get casting sand in the filter, assume the oil / egr cooler has gone again, and keep running the filter until it is reasonably clean --- then do the cooler /egr and flush again.
Be sure you do VC-9 and follow the flush instructions exactly.
Hotshot
Joined: Jul 2005
Posts: 13,834
Likes: 26
From: Middle Tn.
It is not unusual at all to have casting sand still an issue after 110,000 miles --- especially if the engine was not run hard then run run hard.
If you get casting sand in the filter, assume the oil / egr cooler has gone again, and keep running the filter until it is reasonably clean --- then do the cooler /egr and flush again.
Be sure you do VC-9 and follow the flush instructions exactly.
If you get casting sand in the filter, assume the oil / egr cooler has gone again, and keep running the filter until it is reasonably clean --- then do the cooler /egr and flush again.
Be sure you do VC-9 and follow the flush instructions exactly.
Hotshot
Joined: Dec 2003
Posts: 15,369
Likes: 121
From: Stuttgart, Ar
I was going to add the external coolant filter, but I am clueless on how to check the coolant system for blockage, especially knowing that the coolant temperatures never get out of the normal operating ranges.
Other than putting in the cooler filter is there anything else you would do??
Other than putting in the cooler filter is there anything else you would do??
Have you looked carefully at the components here: Page 25: Lubrication System
I'm wondering if you don't have (if it's even possible) an issue with the oil cooler bypass and/or filter bypass letting your oil go through too quickly. Just a thought.
Senior User
Joined: Jan 2006
Posts: 120
Likes: 0
I don't know if this would help or not in diagnosing this problem. Would a infrared thermometer help look for hot and not so hot spot in the cooling and oil system? Just a thought.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Tuned
Joined: Aug 2008
Posts: 301
Likes: 3
I am 99.999% certain your oil cooler is plugged up and you will need to change it again. Believe me I was in complete denial as well. Replaced oil cooler still difference in temps - Ford Powerstroke Diesel Forum
Hotshot
Joined: Dec 2003
Posts: 15,369
Likes: 121
From: Stuttgart, Ar
The TSB says afterward. This conversation comes up quite often and there are lots of opinions. Doing the flush with a plugged cooler does not allow a complete flush of the whole cooling system and chances of a new cooler plugging are very small, although it obviously happens.
Hotshot
Joined: Aug 2006
Posts: 17,399
Likes: 318
From: Whittier, CA
I am 99.999% certain your oil cooler is plugged up and you will need to change it again. Believe me I was in complete denial as well. Replaced oil cooler still difference in temps - Ford Powerstroke Diesel Forum
Tuned
Joined: Oct 2009
Posts: 425
Likes: 4
Then twice on Sunday to be safe? 
I realy think VC-9 before then watch coolant filter for trash and replace the coolers if filter doesn't catch much trash within 1k miles. As long as filter is catching a lot of trash,it would seem better to prolong cooler replacement.
There will be some cases where one or both coolers have already failed,leaving no choice.
I would think having oil in the cooling system and freezing tempature would present the most challanges in properly cleaning up before new coolers.
Tuned
Joined: Aug 2008
Posts: 301
Likes: 3
The purpose of the VC-9 is really more of a rust remover, which is a great idea. In my case, as many others, the oil coolers are plugging up from other matter. If you subscribe to the silicate drop-out theory, there will be this gelatinous goo circulating in your cooling system. This MUST come out prior to replacing the oil cooler. When I replaced the cooler the second time, I removed the radiator, back flushed EVERYTHING, removed block plugs, used compressed air...... If you're willing to do this then you could probably get away with doing the VC-9 after the cooler, but by all means flush the hell out of it BEFORE replacing. Use tap water and a hose, replace it with distilled afterwords.
Laughing Gas
Joined: May 2009
Posts: 753
Likes: 0
From: Mesa,AZ
I do not have the knowledge that a lot of the others on this forum but in the last couple of years I have had two radiators that I and others thought were good until you take the top and bottom of of them. They were plugged up one was my stolen 03 6.0 with approx, 60k and had done the oil and egr coolers and one was in my 92 Buick regal with approx 60k and heater did not work but after checking temp door, changing heater core, thermostat, water pump, the radiator was all that was left. I realize 3.1 is not a 6.0 but just because water goes in the top and comes out the bottom does not mean it is good. Also all maintenance was kept up to date on both vehicles.