I know I know...but I can't find a good answer to this question:

So here’s the scenario:

I started monitoring my EOT and ECT shortly after I got my Livewire TS. While running the Looney tune for a non-studded 6.0L, things were fine for a long time the numbers I remember were ECT 192ish and EOT 205ish for about a 12-15 degree delta.

Then during a trip to help my parents by pulling a 30 foot box trailer I noticed that my EOT was pushing 235 (I loaded a Tow tune for the towing not the Looney tune). I slowed down and I started watching it real close. For the rest of the 5 hours of towing that weekend it hovered in the 230 range. I wasn’t too worried because I was towing and I didn’t see any oil in the coolant or coolant in the oil and the temps came back down when I ran without the trailer. I was a bit freaked out and didn’t take note of the ECT when the EOT hit 235…oops.

Now fast forward 6 months to last December…I started to notice the EOT going up again without towing, but I’m pretty sure the ECT was holding in the 190s. Again I was a little freaked out about the EOT and I forgot to record the actual ECT…oops, again. But I did know that running empty in cold weather and having the EOT climb to 225 consistently tells me that I am on borrowed time. I ordered a Sinister Diesel oil cooler and replaced it and flushed the coolant system (although there is still a little frustratingly tough residual oil I cannot get out of the degas bottle).

After putting everything back together, I’ve calmed down and I think that I caught the problems before causing irreparable damage I started monitoring the ECT and EOT again.

EOT is back to the 205ish readings but now the ECT is only 174 at the hottest. So I have a 30-35 degree delta.

Ugh, another red flag. The thermostat is toast! I replaced it.

Now here’s where I’m REALLY confused…after replacing the thermostat the ECT is running normal at about 194ish but the EOT is back up to 225!?!?!

I’m still running a 30-35 degree delta and still running the same Looney Tune.

Is this my “New” normal or am I missing something here?

 

Was the oil cooler in a Ford box with instructions from MaxForce? Did you use a solution kit or just an oil cooler?

 

It was\is a Sinister Diesel oil cooler with Ford OEM seals and gaskets.

 

Some of the aftermarket oil coolers have larger-but fewer passages. The idea being it's harder to clog them up but I've read several posts where the EOT runs higher with that design. I looked on the Sinister site (MKM) but really couldn't tell how their's is made.

Either it's one of those designs, or possibly there is still trash in the coolant system and the new cooler is clogging.

 

Im glad this was brought up. Since I have started monitoring mine, I usually stay within 10*traveling at highway speeds,(194 EOT and 185 ECT . During driving around town,they stay within 5-7* with the EOT being in the 188-189 range. Seems pretty good to me, what do you pro's think?

 

Sounds pretty good . Just out of curiosity, what was ambient temp when you took those readings?

 

Those readings were from day before yesterday when it was 82 outside. Thats the warmest day we've had so far.
oh, and those readings was while I wasn't towing. I wont start towing until race season starts next month. And sorry to the OP for the hijack.

 

The temp difference is meaningless until the ECt reaches at least 185, 190+ is preferable.

Josh

 

Yup, that's what I was thinking. 185 is just making the minimum. Especially at 85 ambient. A new thermostat may bring that up a bit. I really think my truck runs stronger when it warmer (190+).

 

I'll throw in a new thermostat when I install the new oil cooler here in a couple weeks and see what happens. I always thought that a cooler running motor made more power. It does in the type of drag racing I do, but its also hard to build heat in a two stroke motor on alky.

 

I think that's generally true, except for some diesels. I used to push my GTO through the staging lanes by hand and it was a street car! I tried to launch at 150* or less. It took a full tenth of the 1/8 mile time from 190*. Later in the night (if I was still in the running ) there wasn't enough time to cool off good between rounds even spraying down the radiator, it would slow down a little unless the ambient temps dropped a lot or I "compensated" .

Sorry OP

 

I know our tractor trailers at work will get up to around the 190-200 range, even when hauling over weight equipment. Other than what they run (Cat motors) I have no experience with the small diesels in these trucks, so its still a huge learning curve for me. Always owned gas motors until 6 weeks ago. I had a 460 in my 94 dually and it would stay around 190 as well when pulling my trailer, which when loaded is roughly around 6k.

 

Two stroke on Alky,,,and two wheels?

 

diesel fuel needs heat to burn, more heat more power.

Josh

 

Atv's. My daughter and I both drag race Yamaha Banshee's at the sand drags. We don't run asphalt.

You know....that makes since to me being that its heat that burns the fuel instead of a spark to light it up.
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