I have not had my truck defuel but towing not even that heavy over a big grade I also get crazy high oil temps and pretty high coolant temps. Its really disapointing. The fan clutch will lock up but not until the truck is really hot. I'm going to add an oil cooler as an addition to the stock coolant/oil exchanger.
Maximum I've seen, just tooling around town, at 80-90 degree ambient was 237. Not hot rodding, not towing, nothing excessive. Maybe the new thresholds are higher but damn... I'm used to maybe seeing 210 while towing.
Ive seen 238 the highest towing up a hill with my camper which isn't that heavy. Temps usually run 20-25 split, Coolant temp could come down a bit too but I would really like to get the oil temps down some. Most of the time mine runs about 219 with my camper.
Very interesting information here. As noted below, we are going to take a look into this concern and see about developing a solution to the high temperatures.
What makes you say Mishimoto is junk? I've heard a lot of great things about them and I have their trans cooler sitting in my pile of parts to install. It looks like a quality piece IMHO.
I was alarmed by my higher trans temps last summer so I purchased a cooler and larger MagHytech pan. Don't recall my peak but I remember routine 210-220 temps. After reading many posts about how that was normal, I quit monitoring it. Still haven't installed the items but I will be in the next few weeks.
Just not a good track record, and I'd rather spend my US earned dollars on US made stuff is all.
I had a mishimoto in my 6.4l, now have one in my 6.7l. I even have one in my 300zx and Honda Civic, they all have performed great. Especially with the life time warranty how can you beat them. I wouldn't mind buying American but there never in stock.
Thanks F150orelse! Some of the concerns regarding quality are likely attributed to our first generation 6.4L radiator. As you may know, the factory radiator equipped in the 6.4L is extremely prone to failure, which we initially attributed to the plastic material of the end tanks. We developed an aluminum counterpart to remedy the concern and many of our customers had great success with that product. With that in mind, we did have a few customers that continued to experience problems, even after switching to our aluminum radiator. We went into action quickly to perform testing and to determine the root of the issue. We made several modifications to our radiator design in order to improve isolation from the flex seen within the radiator support. The chassis flex causes the radiator to twist which in turn causes the end tanks to pull from the core, resulting in leaks. This is an isolated problem that only some 6.4L trucks will exhibit.
Full details on what we did can be found within the article below.
http://engineering.mishimoto.com/20...erstroke-aluminum-radiator-version-2-details/
Our new design features both improved isolation as well as a strengthened core. All customers who continued to experience concerns (with V1 radiator) were taken care of by our warranty team is the quickest manner possible.
So far our customers have had fantastic success with our V2 design, we are very pleased with the outcome.
Thanks again for the support!
I just asked mike at no limit Friday about what's considered "normal" EOT while towing. I have a welding rig that weighs 10,300 as it sets. Then my 5th wheels weighs 18k or so. I have a 4.5" lift with 3.73s on a Dually with 35" toyo mt. I was being easy on it any never got past 236* EOT. Mike said FORD says 240* is acceptable.
Interesting. Modern oils do tend to withstand higher temperatures prior to loss of viscosity, but I personally would not be very comfortable with temperatures in the 240’s or 250’s.
I'm glad this thread came back to life. Like I said I was seeing 248* temps every weekend when I towed, even in 50* temps and rain. My tranny has always stayed below 210*. Check out this kit from sinister, lowered temps by 20*+
http://www.mishimoto.com/mishimoto-universal-oil-cooler-kit.html
My truck will hit 248 really fast as soon as it drops to 4th gear pulling a hill. It never goes over 248 but you can feel the power fall off. Stock truck
I have been looking into trying this with a good size cooler. but the ports are too small. Not sure if they can be opened up.
http://www.ebay.com/itm/Ford-F-6-7-...Kit-/221587195491?hash=item3397a04663&vxp=mtr
Then I found this with 1/2" npt ports which I still feel is small. Would work with an inline filter and cooler
http://www.ebay.com/itm/1-16-FORD-P...51S-/221239712000?hash=item3382ea1900&vxp=mtr
If I could find a sandwich plate with -10 fittings I think it would work really well.
Thats a tiny cooler. I am surprised it dropped 20 degrees for you, Where did you mount the cooler? Hopefully they sell the sandwich plate by itself because that is exactly what I am looking for. I will add a much larger cooler though
Just looked it up. Looks like the exact same sandwich plate I just put on my subaru. I hate it when you waste time looking for what you already have.
Thanks guys! Unfortunately the sandwich plates we offer will not actually fit on the 6.7L oil filter housing. Hopefully I catch you before an order is placed. The 6.7L filter housing uses a 1”-16 thread, whereas our largest standard filter adapter is ¾-16.
Our universal oil cooler can certainly be used in conjunction with -10AN lines, however an appropriate sandwich plate will need to be sourced in order to route oil properly.
Definitely sounds like a project our team needs to tackle sooner than later. I will notify our team of the existing oil temperature concerns on ’15 models. Perhaps we can look into either developing a new sandwich plate or working on a oil cooler relocation setup.
Thanks
-John
