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My 07-F250-6.0 is my first diesel. Its lifted with bigger wheels and tires.
hen towing a 2 axle toy hauler back from across town yesterday, the EOT got up to 255 and stayed around 250-255. The ECT got up to 220 and would range between that and 214.
My question is, is this normal? We already upgraded the internal oil cooler to one from Sinister diesel and am now looking at adding a secondary oil cooler if we have to so we dont break down when on a trip. I just want to know if these temps are normal before dropping another $1000 to add the 2nd oil cooler.
Considering 260*f is the defuel point for EOT and you're moving the weight with an F-250, something is wrong. What was EOT before you changed the cooler out?
Mark,
Really? The Sisister oil cooler wasnt an upgrade?
Yes, the fan has been roaring at those temps. Normal temps when not towing has been 200-205 or so
Not sure of the coolant in the motor- I'll have to get with the mechanic that changed the oil cooler b/c he changed the T-Stat too.
Yeah, Sinister isn't an upgrade. The only real "upgrades" are either the IPR remote 6.7L cooler that was designed to be a remote mount, or a full BPD oil-to-air kit. Nothing that fits into the factory hole belongs there except a factory unit.
Mark - I've never noticed the discrepancy in the PC-ED Manual until now:
Mark,
my mechanic said it would be an upgrade from factory (bigger cooling tubes)
the EOT and ECT are relatively close in temps with about a 4-8 degree difference.
EOT- 200-212 ECT- 204-220
Bryan,
So the motor goes into a "protection" mode when the EOT goes above 253*??
Yes, fueling is reduced to try to hold back engine temps at ECT over 221*, EOT over 253*. Mark asked about the fan because multiple factors can trip 100% fan clutch engagement, and EOT being high enough is one of those.
Mark - page 1-33 is the 221*ECT/253*EOT derating language (second pic), the first pic is from a chart on 3-11 as part of the pinpoint tests of concern of "engine down on power with no CEL". I wanted to type 235 for oil but that seemed wrong, I searched in the wrong book and 260* popped up. Weird.
This review from Sinister's website oddly enough points out the problem, lack of knowledge on the correct spec because this guy was 5-Star happy with an oil cooler that's double the acceptable split brand new. Split should be under 10* brand new, more like 4-6* on average.
Bigger "tubes" means less cooling surface area. You need surface area to exchange heat. Your mechanics have cost you a lot of money.
A plate type (OEM) oil cooler will have a LOT more area than a shell and tube cooler. I would be surprised if the Sinister cooler actually had "tubes". I have seen it advertised w/ thicker plates, which does the same thing ... reduces heat transfer.
In post #10 did you label the temperature ranges wrong? The coolant will be lower than the oil.
Assuming the labeling was switched, then it doesn't look as much like plugging as it does a problem w/ the Sinister cooler .... AND a thermostat or fan problem. The fan problem isn't likely if it was "roaring". I guess it could be a weak water pump also.
UGH!
Thanks,
Yes, I had the temps reversed on accident. my apologies. Maybe it is a weak water pump or wrong T-Stat.
So what should I do now seeing as I have put so much money into replacing the oil cooler with the one from Sinister? Would adding the external oil cooler help?
EOT/ECT temps when towing a load
