So I have been messing around with my Xcal II to do some data logging, but even with all the updates, and all the help from the techs at SCT, I can't get my EOT to read correct Farenheit (it reads around 9-10k). The ECT reads good, but doesn't do me any good obviously, if I can't compare.

Anyway, I gave up on the laptop, and hooked up a Snap-On Modis Scan Tool and went hot-lapping today.

Ambient temperature was 105 f.

Driving the truck WOT (on a slight grade, maybe 1%) per the Ford TSB, the max spread was 8 degrees. The most heat it would build was 208 ECT-216 EOT.

I did several runs on level, and the aforementioned slight ascending grade.

On level (running it WOT per Ford TSB) it would run as low as 192/194 ECT-198 EOT, all around 102-105 ambient.

After running it hard and then cruising at 70, I did see a delta of 15 degrees
(192 ECT-207 EOT) just for a hot (no pun intended) second, as the coolant temp came down fast and the oil temp was a little slow to follow. Oil temp then followed and the truck ran 192/194 ECT-201/203 EOT cruising at 80-85.

Obviously the temps would be different if I was dragging one of my trailers, but at least it was a fairly warm day.

The truck only has 42k on it, and the coolant was changed 20k ago when I did the head gaskets and studs.

I am not going to panic, I am just going to start gathering parts to do the oil cooler and most likely switch over to ELC. Probably just do a distilled water flush, I don't think a chem flush is in the cards, at least in the near future.

I change the oil every 3k, and the samples always come back good, so that is a little peace of mind as well.

 

That's exactly what my truck runs with a new oil cooler. 4-6 degree spread around town, 8-10 on the freeway. Don't sweat a momentary spread of 15 degrees as that will happen when loading the motor up.

 

Where did you get a ford tsb that says to run the truck at wot to test the deltas. Everything I have read says to take your temp difference at 65 on flat ground, once the ECT, and EOT is at normal operating temps. You should be worried if at that point your delta is over 15 degrees steady. A momentary spike is nothing to worry about. I'm going to look up the tsb on my alldata now.

 

There's nothing wrong with your readings. I do question your methodology however. If you want a true delta, run the truck at hiway speeds for approx. 20 miles to get the engine heat saturated and then take the readings doing approx. 65 on level ground. WOT's and quick decels will never give a true delta.

 

I also have a new cooler , my temps are pretty damn close i would not worry about it yet.

 

This was a Ford TSB, printed from a printer at dealer in California. It was a rather old one, and I couldn't find another one in the TSB list on FTE. Is there a copy on FTE and I missed it? Or does anyone have the # off the top of their head?

 

Thanks for the input people. I would like to have that TSB # if you have it texans.

Regardless, I am going to hook up the Modis and go for a 20 mile jaunt as suggested.

At 65 I remember the numbers being really good, but I want to get some solid numbers with a more accurate test.

 

COOLANT LOSS—6.0L TSB 09-8-3


5. Road Test For Restricted Oil Cooler - Setup and Observations:

a. Install integrated diagnostic system (IDS), select engine coolant temperature (ECT) and engine oil temperature (EOT) PID’s on IDS Datalogger.

b. Carefully drive the vehicle at wide open throttle (WOT) / high load to achieve maximum boost.

NOTE:
FOR ACCURATE TEST RESULTS, ECT TEMPERATURE MUST BE GREATER THAN 190 °F (88 °C) WHEN MEASURING THE ECT AND EOT MAXIMUM TEMPERATURE DIFFERENTIAL.

c. Observe ECT and EOT PID’s on IDS Datalogger. EOT maximum temperature differential might occur at throttle tip-out.
(1) If EOT is within 15 °F (8.4 °C) degrees of the ECT, go to Step 7.
(2) If EOT exceeds ECT by 15 °F (8.4 °C) or more at any time during the test, go to Step 6.

6. Service Oil Cooler and Pressure Test EGR Cooler Off Vehicle:

 

Thanks Mark, that is the one, I just found it and had copied that portion of the text, but you beat me to it.

So where is everyone getting the 65 MPH cruise info? Is there a a later TSB than 09-8-3?

 

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?

 

69cj, where did you get the 65 MPH/Level Ground info? It makes sense, but it obviously differs from what the Ford TSB states.

 

I think I have seen it somewhere - just can't put my fingers on it though ..............

 

I have been looking for it too, to no avail. Oh well, until another one pops up, I am satisfied with the Ford TSB numbers.

 

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)

 

thats not normal
the coolant is supposed to cool the oil not the other way around

possible problems are stuck thermistate,bad head gaskets,streched head bolts,
what are the exact temps your getting
is the radiator stack clean

get a coolant filter on it if you dont already