My engine oil temp will hit 235 when towing my trailer up a good grade. My trailer weighs in about 10k. Does this temp seem to high or is this normal for a 6.0? My water temp will stay under 220 or so on the same hill, I can hear the fan fan kick in. Without the trailer under normal highway driving my eot and ect are within a few degrees of each other right around 188. The high oil temp scares me, just curious to see what oil temps you guys are reaching while towing. Thanks

 

the spread thing doesnt really have any value for towing

I Would begin to worrey if you saw EOT of 253* thats when the engine defuels

 

What's a good grade to you? I have plenty that I frequently tow(10K+) across that are 6%+. I used to get worried at 240* EOT, but now I don't care unless I'm closer to 250*.

 

I have seen mine at that temp while towing. You should hear your fan at some point also.

 

Thanks for the quick replies. The highest eot I have seen are 236 and that us up a 6% grade towing 10k, and I do hear the fan kick in around 215 ect. Thanks again guys I feel like my 6.0 is runing normal.

 

04 F350 4x2 dually 105,000 miles pulling 14,500# 5th. I will see 215 to 220 ECT with EOT of 12 to 19 more than the ECT. At 218 the fan will be on full at 2000 RPM and both ECT and EOT will drop 2 to 4 degrees.

I did have a new oil cooler installed at 85,000. I was getting up to 30 degree spread with EOT to 250.

These are 6 to 7 % grades for 15 to 20 miles.

 

I routinely see low to mid 230's EOT towing 9k in the SoCal mountains.

 

Did you get the EGR cooler replaced at the same time. I am changing my Oil cooler soon and I am not loosing any coolant yet.

ECT 190, EOT up to 222 when uphill.

 

The EGR cooler was pressure test and pasted so Ford did not replace the cooler. I had installed a coolant filter at 56,000 but I am assuming the oil cooler had already been partially plugged by then.
The 1st coolant filter was totally plugged within 300 miles. 2nd filter lasted about an other 1000 miles. 3rd I replaced at 80,000 when I changed my coolant (was not plugged) and I am still on the 4rd after 26,000.

 

I wonder how they test it. I just do not want to through money on a still good EGR cooler.

From your experience, I see the full benefit on a filter. I had ordered one to install it but it was never delivered.

Where did you buy your's?

 

The only time the eot/ect deltas are valid is when the motor is totally warmed up, 15 to 20 miles highway, and you'r on level ground. It doesn't matter if towing or empty. Deltas are invalid when climbing, cresting or descending a grade. They will chase after one another.

 

This is one procedure:

 

Thanks, very interesting, maybe I will test that before I change the EGR cooler. I know it is a lot or work to redo the EGR once you are almost there, but we are talking about around 600 dollars more to change a good working EGR cooler, if it ain't broke, leave it alone. I am pretty sure many Powerstroker have many miles with the stock cooler.