Just another ECT vs EOT story
Hotshot
Joined: Dec 2003
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From: Stuttgart, Ar
Postmaster
Joined: Jul 2005
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From: Abilene, Texas
Same here. I have never actualy looked at the tsb until now. I guess that's what I get for sticking my foot in my mouth. 
I could have swore that even Cheezit has stated 65 mph.
Either way it still makes more since to me than the wot thing.
Hotshot
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From: Middle Tn.
From what I've read here, and what the local Ford diesel mech. has told me and also from monitoring the temps. everything points to the level ground and steady speed theory. If climbing or wot or cresting a hill and going down it you always have one temp chasing the other. For example after climbing and then cresting a hill the ect will crash in a matter of seconds where it will take the eot a matter of minutes to catch up to the ect. You could easily get a 30* or higher spread there. That is why you want everything stabilized to get a true delta.
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Elder User
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From: SoCali!!
I agree the stabilization of the fluid temps would seem like the best method to check for anomalies, but I wonder why FoMoCo would specify the WOT method?
I have a good friend who is a FoMoCo Master Tech; specifically a factory trained 6.9, 7.3, 6.0, 6.4 diesel guy, I will hit him up for a theory, or any documentation he may have.
I have a good friend who is a FoMoCo Master Tech; specifically a factory trained 6.9, 7.3, 6.0, 6.4 diesel guy, I will hit him up for a theory, or any documentation he may have.
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From: SoCali!!
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Elder User
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From: SoCali!!
05/12, '03, 05/07 6.0, Torqshift, CC, SB, 4WD, FX4 Sport, Sonic Blue/Grey, 8" Edge lift, six Foxes, Fox damper, 38x15.50x18 Toyo M/T's, Weld Renegades, Detroit Locker, 4.30's, Mag-Hytecs, ARP's, Hypermax HG's, Fluidamper, Spearco IC, MBRP 304, Trans; Converter and SCT tuning by John Wood, Custom Trac Bars, Onboard Air, AMP steps.... lots more
SoCalSuperDuty03 -
I like your truck!
(sorry for the hijack)
SoCalSuperDuty03 -
I like your truck!
(sorry for the hijack)
truck.
The crazy thing is, I love all of our trucks... '99, '11, Gas, Diesel, 2WD, 4WD, lowered, lifted, all done up or stock as a rock, I love them all.
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From: SoCali!!
I have an interesting situation I would like your opinions on.
I had my EGR and Oil Cooler replaced about 5,000 miles ago. Since then I have towed about 4,200 miles across the West with little problem and lots of power.
I have noticed, however, that my EOT is sometimes BELOW by ECT. The oil temp will sometimes be lower than the coolant temp, even after the engine is fully warmed up.
Does this makes sense? Is this normal?
I had my EGR and Oil Cooler replaced about 5,000 miles ago. Since then I have towed about 4,200 miles across the West with little problem and lots of power.
I have noticed, however, that my EOT is sometimes BELOW by ECT. The oil temp will sometimes be lower than the coolant temp, even after the engine is fully warmed up.
Does this makes sense? Is this normal?
With my SCT datalogging, I was reading a bunch of different PID's, but the EOT and EOT farenheit were interesting to me, as the EOT farenheit never graphed correctly, reading in the 9-10k range. The EOT (not sure where the sensor is for this, if it is different than EOT f) read in normal temps, mirroring the ECT at times, but reading BELOW the ECT at other times.
That is partially why I gave up and hooked up the Snap-On scan tool, I was getting paranoid by the erroneous readings.
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From: SoCali!!
From what I've read here, and what the local Ford diesel mech. has told me and also from monitoring the temps. everything points to the level ground and steady speed theory. If climbing or wot or cresting a hill and going down it you always have one temp chasing the other. For example after climbing and then cresting a hill the ect will crash in a matter of seconds where it will take the eot a matter of minutes to catch up to the ect. You could easily get a 30* or higher spread there. That is why you want everything stabilized to get a true delta.
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Hotshot
Joined: Apr 2010
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From: Saratoga Springs,UT
I came up with a 25* spread. When I changed and cut that oil cooler open it was plugged solid
so it seams that the 65MPH flat ground method was a Great Indicator
Hotshot
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From: Middle Tn.
Two diff. Ford mechanics at two diff. dealerships. 65 mph is a number used since that's the speed limit and it gives everything a good saturation. I imagine 55 or 75 would also work as long as it's on flat ground and the temps have stabilized.
Tuned
Joined: Jun 2011
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From: West TN
a clean oil cooler is going to work rapidly and well to bring the oil near the coolant temp. Either test should tell you whether that's happening or not. If the oil takes a long time to come back down after hard work, or if the oil steadily goes way above the coolant on a steady run, they're both telling you the oil cooler is inefficient. That's the point of the test.
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