High EOT's AFTER repairs.
Fleet Mechanic
Joined: Nov 2012
Posts: 1,347
Likes: 110
From: Lakeland, Fl
My reasoning for checking the oil temp at the factory temp sensor location is to verify that the oil is indeed as hot as the factory system indicates at that location...it would be installed only long enough to see what temps I have after a 30 minute drive on the interstate.
It will, of course, play hell with the processor due to the factory sensor indicating low or no oil temp.
My understanding is that the factory oil sensor location is at the point, or very near, where the oil exits the cooler.
If you think I'm off base please let me know...your thoughts are appreciated.
It will, of course, play hell with the processor due to the factory sensor indicating low or no oil temp.
My understanding is that the factory oil sensor location is at the point, or very near, where the oil exits the cooler.
If you think I'm off base please let me know...your thoughts are appreciated.
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5th Wheeling
Joined: Dec 2012
Posts: 47
Likes: 0
From: Central Florida
We have checked the oil temp with an infra-red gun at both the oil filter housing and the base of the oil temp sending unit. The temps are within a degree or two of the factory equipment.
We're looking for real time verification of what we know to rule out possibilities.
At this point in the game, we're literally grabbing at straws and appreciate any and all input.
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5th Wheeling
Joined: Dec 2012
Posts: 47
Likes: 0
From: Central Florida
No, I did not understand there is a bypass for oil around the cooler. I've read and seen so much information in the past months that I probably knew that but have lost track of it.
So, back to square one...
Disassembly and inspection is what's left...
I find it amazing that people change these coolers everyday and solve the problem and I change EVERYTHING and don't have even the smallest effect.
Pardon my frustration...
Last edited by 06FUN; Aug 18, 2013 at 07:48 AM. Reason: Clarification
Logistics Pro
Joined: Dec 2004
Posts: 4,138
Likes: 7
From: South Weber, Utah
There is a bypass for the oil in the oil cooler housing.
Certified Thread Hijacker
Joined: Aug 2001
Posts: 14,441
Likes: 59
No, I did not understand there is a bypass for oil around the cooler. I've read and seen so much information in the past months that I probably knew that but have lost track of it.
So, back to square one...
Disassembly and inspection is what's left...
I find it amazing that people change these coolers everyday and solve the problem and I change EVERYTHING and don't have even the smallest effect.
Pardon my frustration...
So, back to square one...
Disassembly and inspection is what's left...
I find it amazing that people change these coolers everyday and solve the problem and I change EVERYTHING and don't have even the smallest effect.
Pardon my frustration...
https://www.ford-trucks.com/forums/1...l#post12818761
https://www.ford-trucks.com/forums/1...l#post13336923
https://www.ford-trucks.com/forums/1...l#post13375328
And again by me in post #90.
And you consistently ignored the advice and went with other factors that had nothing to do with your issue. Obviously if the cooling system is functioning as your ECT temps show (although sometimes on the cold side) the issue is within the oil cooler housing.
Josh
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5th Wheeling
Joined: Dec 2012
Posts: 47
Likes: 0
From: Central Florida
Not to throw salt in the wounds, but you were told:
https://www.ford-trucks.com/forums/1...l#post12818761
https://www.ford-trucks.com/forums/1...l#post13336923
https://www.ford-trucks.com/forums/1...l#post13375328
And again by me in post #90.
And you consistently ignored the advice and went with other factors that had nothing to do with your issue. Obviously if the cooling system is functioning as your ECT temps show (although sometimes on the cold side) the issue is within the oil cooler housing.
Josh
https://www.ford-trucks.com/forums/1...l#post12818761
https://www.ford-trucks.com/forums/1...l#post13336923
https://www.ford-trucks.com/forums/1...l#post13375328
And again by me in post #90.
And you consistently ignored the advice and went with other factors that had nothing to do with your issue. Obviously if the cooling system is functioning as your ECT temps show (although sometimes on the cold side) the issue is within the oil cooler housing.
Josh
I hope you don't really feel that I "consistently ignored the advice". I have read and considered each and every piece of advice all of you have offered.
At this point, I'm still on the outside of the engine...at some point, based on what we've found, I'll have to remove the turbo and intake to further investigate the oil cooler housing.
Pardon me for letting my frustration show the way I did...I should have re-read all of the posts prior to making such a comment.
Thanks again to all of you.
Logistics Pro
Joined: Dec 2004
Posts: 4,138
Likes: 7
From: South Weber, Utah
I hope you don't really feel that I "consistently ignored the advice". I have read and considered each and every piece of advice all of you have offered.
At this point, I'm still on the outside of the engine...at some point, based on what we've found, I'll have to remove the turbo and intake to further investigate the oil cooler housing.
Pardon me for letting my frustration show the way I did...I should have re-read all of the posts prior to making such a comment.
Thanks again to all of you.
At this point, I'm still on the outside of the engine...at some point, based on what we've found, I'll have to remove the turbo and intake to further investigate the oil cooler housing.
Pardon me for letting my frustration show the way I did...I should have re-read all of the posts prior to making such a comment.
Thanks again to all of you.
Thread Starter
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5th Wheeling
Joined: Dec 2012
Posts: 47
Likes: 0
From: Central Florida
I took Bullitt390's advice and reviewed all of the advice offered by you guys and we're looking hard at the oil filter base and oil cooler cover to figure out if it's bypassing continuously.
Our only choice is removal and inspection but I have to find time for my truck to be down for at least a day.
I'll report back once we've accomplished the disassembly and inspection.
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5th Wheeling
Joined: Dec 2012
Posts: 47
Likes: 0
From: Central Florida
I did!!! But they did it while I was out of town Sept 9 thru 13 and I haven't had time to craft a clear explanation of what was found...I'll get to it in a few days and bring all of you up to speed.
Thanks for the concern.
06FUN (Donnie)
Logistics Pro
Joined: Dec 2004
Posts: 4,138
Likes: 7
From: South Weber, Utah
Good deal, there are a few that are anxious to hear what was causing the problem, myself included.
Cargo Master
Joined: Jun 2007
Posts: 2,723
Likes: 5
From: Roseburg, OR
Me too. I'm happy you had the problem solved. I was getting nervous for you.
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5th Wheeling
Joined: Dec 2012
Posts: 47
Likes: 0
From: Central Florida
To all,
Last week, 09/09/13 thru 09/13/13, I was out of town and sent my truck to the tech'sfor further trouble shooting. The turbo and intake were removed so they couldfocus on the oil cooler and filter housings. Both were inspected carefully forany sign of damage. Both proved to be in good working order.
Each port from the engine to cooler and then from the coolerto the engine was inspected for blockage. Nothing of note wasfound.
Per the previous discussion here on this forum, the bypassvalve for the oil cooler was given special scrutiny. On the surface, itappeared to be in good working order so a new filter housing and base wasordered in. A comparison of the old to the new was performed which showed nodifferences. The springs behind the two valves were measured with a dialcaliper and showed only a few thousandths of an inch difference in relaxedlength. We were unable to measure spring tension so we cannot say whatdifference there is. It was decided that we would replace the filter housingthus replacing the oil cooler bypass valve (we attempted to purchase the bypassvalve as a separate item but we weren't able to do so).
After reassembly and 4 separate test drives over2 days the oil temp seems to be in order. I'm showing a 3 to 6 degree spreadaround town and an 8 to 12 degree spread on the highway at 75 mph with theambient temp hovering in the low 90's.
These temps aren't as low as what I showed prior to the head gasket failure but are within Ford's specs.
What caused the weakening of the spring behind the bypass valve is a mystery to us. Making replacement of the spring a part of an oil cooler change is difficult due to cost and the fact that it seems to be extremely rare for it to fail.
In total, I spent $11,227.00 during the last 9 months repairing the engine and chasing my tail looking for the source of the oil heating. In retrospect, it seems obvious to look at the bypass system but I was trying like hell to not open the engine again. Roughly calculated, I figure I spent $3,500.00 chasing my tail but ended up with a new LPOP, front cover, water pump and radiator. I'm hoping for some trouble free miles from here...we shall see.
Thanks again to all who helped.
Donnie
Last week, 09/09/13 thru 09/13/13, I was out of town and sent my truck to the tech'sfor further trouble shooting. The turbo and intake were removed so they couldfocus on the oil cooler and filter housings. Both were inspected carefully forany sign of damage. Both proved to be in good working order.
Each port from the engine to cooler and then from the coolerto the engine was inspected for blockage. Nothing of note wasfound.
Per the previous discussion here on this forum, the bypassvalve for the oil cooler was given special scrutiny. On the surface, itappeared to be in good working order so a new filter housing and base wasordered in. A comparison of the old to the new was performed which showed nodifferences. The springs behind the two valves were measured with a dialcaliper and showed only a few thousandths of an inch difference in relaxedlength. We were unable to measure spring tension so we cannot say whatdifference there is. It was decided that we would replace the filter housingthus replacing the oil cooler bypass valve (we attempted to purchase the bypassvalve as a separate item but we weren't able to do so).
After reassembly and 4 separate test drives over2 days the oil temp seems to be in order. I'm showing a 3 to 6 degree spreadaround town and an 8 to 12 degree spread on the highway at 75 mph with theambient temp hovering in the low 90's.
These temps aren't as low as what I showed prior to the head gasket failure but are within Ford's specs.
What caused the weakening of the spring behind the bypass valve is a mystery to us. Making replacement of the spring a part of an oil cooler change is difficult due to cost and the fact that it seems to be extremely rare for it to fail.
In total, I spent $11,227.00 during the last 9 months repairing the engine and chasing my tail looking for the source of the oil heating. In retrospect, it seems obvious to look at the bypass system but I was trying like hell to not open the engine again. Roughly calculated, I figure I spent $3,500.00 chasing my tail but ended up with a new LPOP, front cover, water pump and radiator. I'm hoping for some trouble free miles from here...we shall see.
Thanks again to all who helped.
Donnie