eot to high
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Senior User
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eot to high
so my eot and ect are at times almost 20 degree difference when I am going up a steep grade it can get up to 245 on the eot. I am thinking my oil cooler is plugged up would flushing the cooler be a good idea before I go out and get a new cooler or is it just time for a new cooler?
Lead Driver
Joined: Feb 2011
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From: L.A. (Lower Alabama)
While you're right that 245° is gettin up there a little, the accepted spread is 15° Or less, unloaded, around 65mph, cruising on level ground. It can vary a lot towing in the hills so it's important to be precise with the conditions in order to compare to the benchmark.
Logistics Pro
Joined: Feb 2005
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From: Upper Left Coast
If you're getting a difference of 20-25 degrees level at 65, your oil cooler is likely clogged.
It would be good to flush the entire cooling system and run it long enough for any debris broken loose to become lodged in the old cooler before removing/replacing it with a new cooler.
(you want to try to minimize the amount of debris remaining in the system getting into the new cooler)
It would be good to flush the entire cooling system and run it long enough for any debris broken loose to become lodged in the old cooler before removing/replacing it with a new cooler.
(you want to try to minimize the amount of debris remaining in the system getting into the new cooler)
Posting Guru
Joined: Dec 2012
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From: SW Florida
What are the actual ect & eot when you get this difference?
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Logistics Pro
Joined: Dec 2004
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From: South Weber, Utah
You want to do a flush with VC-9 before doing an oil cooler anyway, so if you want to see if that solved your temp problem just refill the system with coolant after the flush and see and if it doesn't then all you are out is the cost of the coolant. Just curious, what do your ECT,EOT and TFT temp sensors read after an overnight cold soak? They should all be within a degree or two of one another.
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Logistics Pro
Joined: Feb 2005
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From: Upper Left Coast
A new oil cooler is only about $300.
The amount of work to replace it such that it's simply not worth it try to "clean" the old one.
You DO want to ensure that you clean the cooling system well so you don't just plug up the new cooler right out of the chute!
The amount of work to replace it such that it's simply not worth it try to "clean" the old one.
You DO want to ensure that you clean the cooling system well so you don't just plug up the new cooler right out of the chute!
Fleet Owner
Joined: Nov 2003
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Did you flush the coolant when you first got the truck?
What coolant does it have in it currently?
If you replace the oil cooler, I would recommend one from Ford (if you are not going to bite off the expense of an external oil cooler from BulletProofDiesel).
What coolant does it have in it currently?
If you replace the oil cooler, I would recommend one from Ford (if you are not going to bite off the expense of an external oil cooler from BulletProofDiesel).
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No I did not flush it when I bought it. It had a new radiator and degas container when I bought it I assume that they put in the proper coolenr but not sure. It would not surprise me if the dealer used the green or a universal coolent
Logistics Pro
Joined: Feb 2005
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From: Upper Left Coast
No I did not flush it when I bought it. It had a new radiator and degas container when I bought it I assume that they put in the proper coolenr but not sure. It would not surprise me if the dealer used the green or a universal coolent
Do a thorough flush following the technique in the "sticky" , with a cleaning agent (Restore, VC-9, etc) with the old cooler installed...........
Then replace the cooler. Use any Cat EC-1 coolant mixed with distilled water when you refill it.
Take pictures and post your results! We love pictures!