NEED HELP HAVE A 08 F 350 4X4 DIESEL TEMP GAUGE REDLINES INSTANTLY AFTER PULLING TRAILER ABOUT 15 MILES BUT ENGINE NOT OVERHEATING .STOP AND TURN KEY OFF FOR ABOUT 5 MINUTES START BACK UP AND ITS BACK TO NORMAL SHOWS REDUCING POWER WHILE ITS REDLINING. WITHOUT TRAILER IT NEVER GETS HOT EVEN RUNNING 80 DOWN HIGHWAY OR IDILING IN 110 DEGREE WEATHER. TOOK TO DEALER DROVE WITH TECH PULLING TRAILER WITH HIS COMPUTER HOOKED UP TO TRUCK,THEY ARE SAYING OIL COOLER IS STOPPING UP CAUSING OIL TO OVERHEAT.THEY WANT 3000.00 TO FIX HAS ANYBODY HEARD OF THIS BEFORE OR HAVE ANY OTHER ADVICE.. THANKS

 

should be under warranty...are you over 100K miles?

 

over 100,000

 

You are about the second one I have heard of oil cooler problems. So this a rare as far as I know.

Shop around..it is on your dime. See if there is an international dealer there where you live that can do it.

 

done a few coolers. if your going to have it done have they pull the water pump and check the front cover. I might suggest having them do this first. a heavly cavated front cover has the possibility of causing the same type of concern. you may also have more then one concern.
price is fair for an oil cooler to... my opinion.

 

thanks for info i was wondering if i could add some type of cleaner or diesel to oil to try to clean cooler

 

Have you always owned this truck or did you buy it used? I am wondering this as the local Ford Diesel mechanic that I go to is telling us that the local ranchers are NOT changing oil on the "severe service schedule" and idling a lot and they are seeing this issue more this year than before. He also said the the ranchers are not using the proper oil. They are going to TSC or other farm and ranch supply stores and buying the cheapest "Diesel Motor" oil and using that in very severe conditions. Interesting as you bring this up now as several of us had coffee yesterday morning (Mike comes in most mornings) and this came up and he was telling us the observation. He said he was not 100% on this but he was pretty firm on the parafin that he has seen coming out of some of the engines. He said the 6.0's are not immune to it either.

 

no bought truck used has about 140,000 miles motor was rebuilt at 111000 truck looks runs and drives likenew unless you pull a trailer and just started that about500 miloes ago i use motorcraft filters and oil dont know what previous owner used. wonder if i could run some type of cleaner in oil or even diesel to try to flush?

 

dont' do any of that. Just drive a couple K and dump the oil and put in fresh

 

Ditto! No additive except for a Cetane booster such as one from Motorcraft or Diesel Kleen. They will tend to clean the injectors a bit also.

 

towing 38 feet trailer after 100 miles run at 65 goes reduce engine i stop 10 min idling back to normal! if i go 50 miles nothing happents ,also i have change 4 radiators in one year! fan clotch, thermostat! no water in oil ,no white smoke, delete pdf, egr used a GEar box tuner