i was wondering if some of you could post your temps, and driving conditions.

i just recently am able to monitor both and at 70 mph empty on a mainly flat stretch of I75 and i am seeing a 8f spread (193 ect/201 oet) at 55 its more like a 5 or 6 degree spread.

i do have the most recent flash and never had any codes, but i am wondering what is "normal"

on one recent trip i had a 9`f spread steady for about 50 miles, running into a 30 mph head wind, but generally i am seeing 7-8 at 70mph on the hwy

 

A search would have brought up several threads about this.

Your numbers couldn't get much better.

 

Would help to know what you are driving, year,mileage etc.

12 to 13 degF here pulling 15,000lb RV.

 

2 degrees to 5 degrees with a new engine therefore a new oil cooler. I have yet to d]see more than 5 once the engine reaches operating temperature. I will be hauling my 12000 pound fiver next Friday. We will see what happens then.

Regards

 

thanks guys, new engine/ new oil cooler spec is what i was looking for.

my truck is an 07 with 96,000+mi. recently drained/flushed cooling system with new thermostat

 

My 2003 has the original EGR cooler and oil cooler, at 70 empty the EOT is 193 ECT is 187. Sat. I had to move some clay targets and had 1 ton in the box and pulling a 5,500 lb. trailer the temps were EOT 191 ECT 185 doing up to 50 mph on local roads. So the spread in my truck is around 6 but driving 35-50 mph non-highway roads it stays within a 3 deg. spread. 122,000 on truck.

 

79000 on my 03 f350, highway driving I average 183 ECT 190 EOT, city driving 180 ECT 185 EOT. Original EGR/Oil Cooler.

 

Have anyone considered / tried a regular air cooled oil cooler?

i.e. just bypass the in engine oil cooler and circulate the coolant straight to the EGR cooler?

 

Wondered the same thing

 

A lot of decisions were made for the Navistar premised on a package size / form factor that is compact and readily installable with a minimum of connections and outboard devices.

Many of the decisions, like hanging the FICM on the side, make zero sense in terms of long term durability and subjecting the components to excessive and unnecessary heat, shock and vibration.

There was absolutely no reason to stick an oil cooler where it is when stock outboard coolers do the job perfectly well --- failing that, a slightly esoteric 2 coolers in radiator (one for transmission fluid, one for oil) would not have been that difficult.

What I am seeing with Navistar is a lot of decisions that were made on an engineering level that show.... um... not so good thinking.

For example, air cooling the EGR with a tried and true cast iron air cooler under the chassis, with a EGR tap a bit further back in the exhaust (to lower the temperature) would have done wonders to destress the system.

 

Plenty of people are "trying" to fix a problem that doesn't have a really good solution. If you want to spend over $1700 ($700 core charge refundable) for an air-to-oil cooler kit then good ahead.

Catalog - ford 6.0 Remote oil cooler


I have 123K on my '06 and for the longevity of the motor a coolant filter kit and oil by-pass filter kit will do more good versus an outside oil cooler. Besides I can drive over 200K and swap in two OEM oil coolers for that cost. BTW my current EOT and ECT temps are WELL within the newly released ranges of 15*F of temperature difference. How? I run the coolant and oil by-pass filter kits, I do preventative maintenance and drive my truck daily.

 

thanks for the input, its one thing to have the temp readings, but knowing at what temp you should do some pm is more important.

i am well aware of the fmc 15`f spread, and i also have the latest flash that going to let me know of the threshold being breached, i just wanted to know where a new engine/engine oil cooler spread temp would be.

as far as externally mounting the oil cooler i think that has more disadvantages than advantages. coolant cooled coolers also warm the oil in cold start-up conditions, we may not have the best designed oc, but many small, medium, and large diesel engines use internal eoc. the largest problem with the 6.0 is not only the casting sand, but also early models had block heater deterioration contributing to cooler plugging.

on my recent drain/flush my coolant looked very clean, very little debris, and i don't have a coolant filter. i switched my coolant to john deere coolgard, so as long as my temps stay where they are at it looks as i'm good.

 

The engine releases the casting sand through out its life. With the amount of reliable experience out there, the cause of the oil cooler failures is quite certain. A coolant filter is an investment of $100 to $160 depending the route you take. Is there any cheaper insurance out there? New engines run at 2 to 5 degrees differences in eot/ect temps at operating temperature and not towing. 15 degrees is the Ford spec. I believe that you are on borrowed time after that. Some have posted 30+ degree differences and no failure yet. I think a hand grenade has had its pin pulled by then. The CEL for the problem will not help you monitor the ongoing and probably changing conditions. If you are monitoring and hit 15 and stay there ????. JMHO

Regards

 

When my oil cooler got plugged up with the sand the truck started to run the engine cooling fan when under any real load. Also little to no fluid into the egr so what got there was flashing to steam and puking. Replaced the oil cooler and egr although the egr cooler pressure tested fine (old round type) 5000 or so miles since and no problems. Also installed a coolant filter using the napa system placed on the frame rail just about under the front pax feet. Just passed 100k miles and running just fine. Photos of the oil cooler and the sand that plugged it available Janton02@comcast.net

 

Oil coolers that will meet spec can be had for... $250 with all the fittings... for the 6.9 and 7.3 which will almost certainly fit the 6.0.

Perma-Cool Light Truck Oil Cooler Kits from AlamoMotorsports.Com!

For $1,000 you are intro custom cooler territory... you can probably get a custom rad made, with dual transmission and oil coolers integrated.

http://www.rondavisradiators.com/custom.htm

Problem with Diesel people is they are far too willing to throw money at the problem rather than to solve the problem with means at hand.