Fan Clutch control parameters
Thread Starter
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Tuned
Joined: Aug 2003
Posts: 285
Likes: 5
From: Mena, AR
Fluid needs to be flushed. I was just about to do a complete flush + filter. It doesn’t seem burned or discolored. I’ll know more when I drop the pan when doing the filter.
Mountain Pass
Joined: Aug 2021
Posts: 142
Likes: 14
Level is okay though?
Mountain Pass
Joined: Aug 2021
Posts: 142
Likes: 14
Also, when you drop the pan look closely for metal glitter in the fluid, and the condition of the trans filter for any obvious damage.
You can change the filter, flush the fluid, and then you can look at changing the OD Solenoid.
Thread Starter
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Tuned
Joined: Aug 2003
Posts: 285
Likes: 5
From: Mena, AR
What is the build date of your truck?
Also, when you drop the pan look closely for metal glitter in the fluid, and the condition of the trans filter for any obvious damage.
You can change the filter, flush the fluid, and then you can look at changing the OD Solenoid.
Also, when you drop the pan look closely for metal glitter in the fluid, and the condition of the trans filter for any obvious damage.
You can change the filter, flush the fluid, and then you can look at changing the OD Solenoid.
Thread Starter
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Tuned
Joined: Aug 2003
Posts: 285
Likes: 5
From: Mena, AR
Update on temp findings after getting Forscan with pretty level driving. My truck does have ladder rack and tips the scales at just under 10K so it's heavy and dragging a sail through the air.
40 MPH or less 60-65 MPH. 70-75 MPH
Engine oil temp = 215. 231 228
Engine Coolant = 192. 195 194
Transmission = 163. 168 166
Intake air = 111 102 91
Fuel Rail. = 130 138 138
The only correlation that I can see with the fan ramping up and down is intake air temp. When it drops below 95, the fan seems to ramp down despite my oil temp being 228-230. I feel as though my delta T is a bit high with regard to oil temp. I will check tomorrow morning to see what the temp is after a cold soak. I will be doing a transmission filter change and flush followed by a coolant flush and thermostat change. I don't plan on adding any harsh flush to the coolant. I'm skeeered! I will just dump the coolant and flush with water.
40 MPH or less 60-65 MPH. 70-75 MPH
Engine oil temp = 215. 231 228
Engine Coolant = 192. 195 194
Transmission = 163. 168 166
Intake air = 111 102 91
Fuel Rail. = 130 138 138
The only correlation that I can see with the fan ramping up and down is intake air temp. When it drops below 95, the fan seems to ramp down despite my oil temp being 228-230. I feel as though my delta T is a bit high with regard to oil temp. I will check tomorrow morning to see what the temp is after a cold soak. I will be doing a transmission filter change and flush followed by a coolant flush and thermostat change. I don't plan on adding any harsh flush to the coolant. I'm skeeered! I will just dump the coolant and flush with water.
Mountain Pass
Joined: Aug 2021
Posts: 142
Likes: 14
Update on temp findings after getting Forscan with pretty level driving. My truck does have ladder rack and tips the scales at just under 10K so it's heavy and dragging a sail through the air.
40 MPH or less 60-65 MPH. 70-75 MPH
Engine oil temp = 215. 231 228
Engine Coolant = 192. 195 194
Transmission = 163. 168 166
Intake air = 111 102 91
Fuel Rail. = 130 138 138
The only correlation that I can see with the fan ramping up and down is intake air temp. When it drops below 95, the fan seems to ramp down despite my oil temp being 228-230. I feel as though my delta T is a bit high with regard to oil temp. I will check tomorrow morning to see what the temp is after a cold soak. I will be doing a transmission filter change and flush followed by a coolant flush and thermostat change. I don't plan on adding any harsh flush to the coolant. I'm skeeered! I will just dump the coolant and flush with water.
40 MPH or less 60-65 MPH. 70-75 MPH
Engine oil temp = 215. 231 228
Engine Coolant = 192. 195 194
Transmission = 163. 168 166
Intake air = 111 102 91
Fuel Rail. = 130 138 138
The only correlation that I can see with the fan ramping up and down is intake air temp. When it drops below 95, the fan seems to ramp down despite my oil temp being 228-230. I feel as though my delta T is a bit high with regard to oil temp. I will check tomorrow morning to see what the temp is after a cold soak. I will be doing a transmission filter change and flush followed by a coolant flush and thermostat change. I don't plan on adding any harsh flush to the coolant. I'm skeeered! I will just dump the coolant and flush with water.
I believe the once the oil temps starts getting 220+ it starts to kick on the fan. With coolant/ oil temperature difference like you have you might want to start looking at the BPD Half-Kit, although you are fine at 230 with synthetic oil.
Transmission temp is prefect
Did you check both IAT sensors? You only have one posted.
Fuel Rail temps are fine, what’s your ambient temp?
One other thing is your AC, once you get forscan you should be able to see if the high pressure switch is kicking the fan on.
Thread Starter
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Tuned
Joined: Aug 2003
Posts: 285
Likes: 5
From: Mena, AR
Did not check both IAT sensors. Will do that tomorrow. Ambient temps this evening were about 90. I turned the A/C off and it did not make any difference. The oil temp is my major concern at this point. I'll check the sensor tomorrow after a cold soak to see if it's off but I bet my oil cooler is just beginning to clog. I'll have to order all of the stuff to get that job done soon. Not looking forward to it. Will do with cab on but jacked up a bit in order to get to the rear turbo bolts. If I had the cash, I might pay someone to do it but I doubt anyone in our small town can, or will do it. Plus, I'd rather do it myself and know that it was done right.
Mountain Pass
Joined: Aug 2021
Posts: 142
Likes: 14
Did not check both IAT sensors. Will do that tomorrow. Ambient temps this evening were about 90. I turned the A/C off and it did not make any difference. The oil temp is my major concern at this point. I'll check the sensor tomorrow after a cold soak to see if it's off but I bet my oil cooler is just beginning to clog. I'll have to order all of the stuff to get that job done soon. Not looking forward to it. Will do with cab on but jacked up a bit in order to get to the rear turbo bolts. If I had the cash, I might pay someone to do it but I doubt anyone in our small town can, or will do it. Plus, I'd rather do it myself and know that it was done right.
For the Oil cooler, would probably recommend the BPD Half-Kit, if your running synthetic oil you are fine running 230 oil temp. Although, it is still relatively high.
Only thing about the BPD kit is the price, last I checked was around $1500, although it saves you time vs trying to install an oil cooler cab on.
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Thread Starter
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Tuned
Joined: Aug 2003
Posts: 285
Likes: 5
From: Mena, AR
I bought the truck with 150K and it now has 300K. I've run synthetic from day one. Previous owner appeared to have Ford change oil and other fluids regularly according to maintenance schedule. I've done 2 water pumps and have flushed coolant twice more for a total of 4 flushes in 150K. I should have done more and wish I'd installed a coolant filter a long time ago.
The BPD half kit looks great. With my luck, I'd install it and the original oil cooler would rupture and have to be replaced anyway. I'd be willing to spend the $$$ if it were a permanent fix. That oil cooler changeout looks horrid though. I'll have to flush the system first to see if I gain any ground before taking on that changeout.
The BPD half kit looks great. With my luck, I'd install it and the original oil cooler would rupture and have to be replaced anyway. I'd be willing to spend the $$$ if it were a permanent fix. That oil cooler changeout looks horrid though. I'll have to flush the system first to see if I gain any ground before taking on that changeout.
Last edited by philn; Aug 7, 2024 at 10:09 PM. Reason: Added info
Mountain Pass
Joined: Aug 2021
Posts: 142
Likes: 14
I bought the truck with 150K and it now has 300K. I've run synthetic from day one. Previous owner appeared to have Ford change oil and other fluids regularly according to maintenance schedule. I've done 2 water pumps and have flushed coolant twice more for a total of 4 flushes in 150K. I should have done more and wish I'd installed a coolant filter a long time ago.
The BPD half kit looks great. With my luck, I'd install it and the original oil cooler would rupture and have to be replaced anyway. I'd be willing to spend the $$$ if it were a permanent fix. That oil cooler changeout looks horrid though. I'll have to flush the system first to see if I gain any ground before taking on that changeout.
The BPD half kit looks great. With my luck, I'd install it and the original oil cooler would rupture and have to be replaced anyway. I'd be willing to spend the $$$ if it were a permanent fix. That oil cooler changeout looks horrid though. I'll have to flush the system first to see if I gain any ground before taking on that changeout.
The 6.4’s don’t rupture as many oil coolers like the 6.0’s did, and even if your oil cooler gets plugged even more, the half-kit from BPD should be able to keep your temps down no problem.
I currently have a 6.4 that averages around 220 oil temp on the highway, but I am going to get a Half-Kit soon, not worth it to me to put that much time into a normal oil cooler for it to plug up again eventually.
Mountain Pass
Joined: Aug 2021
Posts: 142
Likes: 14
Did not go into reduced power. I did reset the codes after taking a snapshot and then very gingerly got back on the highway and made it home without too much trouble. The transmission is definitely not acting right. Upshift from 2-3 is rough and it does hesitate to go into final gear. The fan cycled continually for 2 hours. Ramped up to full and gradually ramped down to nothing and then 5 seconds later it repeated the cycle.
The Procedure is to disconnect both batteries, wait 5-10 minutes, do steps 2-6, then drive at around 15% throttle all the way to 6th gear, then repeat at 40%, then at 75%.
Thread Starter
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Tuned
Joined: Aug 2003
Posts: 285
Likes: 5
From: Mena, AR
I greatly appreciate all of you help. This forum has saved me in the past due to people like you. I am glad to hear that the 6.4 doesn't have the same rupture issue as the 6.0. That will make my decision easier. This is my HVAC service truck and I don't want it down for a full week while I attempt an oil cooler changeout. I'm concerned about breaking bolts off in the turbo when trying to take off the up pipe. I don't want to create a cab off repair debacle. I'm about to pull the transmission pan. I hope it's clean.
Again, thanks for the info.
Again, thanks for the info.
Thread Starter
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Tuned
Joined: Aug 2003
Posts: 285
Likes: 5
From: Mena, AR
So, pulled the transmission pan and immediately heard something in the pan. Fluid looked pretty good and didn't smell burned. I drop the pan, pull out the filter and find one of the valve body bolts completely out and the one next to it about ¼" backed out! And, they are right where solenoid B is, which was one of my fault codes. Most of the bolts holding the valve body were loose. The only ones that were tight were on the part of the body towards to the rear.
saw a little bit of glitter and the magnet had what I would consider normal, very fine particles stuck to it. So, maybe my transmission issue will be solved soon.
saw a little bit of glitter and the magnet had what I would consider normal, very fine particles stuck to it. So, maybe my transmission issue will be solved soon.
Last edited by philn; Aug 8, 2024 at 04:48 PM. Reason: Added more info
Mountain Pass
Joined: Aug 2021
Posts: 142
Likes: 14
So, pulled the transmission pan and immediately heard something in the pan. Fluid looked pretty good and didn't smell burned. I drop the pan, pull out the filter and find one of the valve body bolts completely out and the one next to it about ¼" backed out! And, they are right where solenoid B is, which was one of my fault codes. Most of the bolts holding the valve body were loose. The only ones that were tight were on the part of the body towards to the rear.
saw a little bit of glitter and the magnet had what I would consider normal, very fine particles stuck to it. So, maybe my transmission issue will be solved soon.
saw a little bit of glitter and the magnet had what I would consider normal, very fine particles stuck to it. So, maybe my transmission issue will be solved soon.
Thread Starter
|
Tuned
Joined: Aug 2003
Posts: 285
Likes: 5
From: Mena, AR
Everything went well on the test drive. Had to drive about 50 miles with lots of stops and starts as well as highway driving before the 2-3 upshift smoothed out. It's shifting smoothly now. I still have a hard time believing that the bolts were that loose. I had never heard of anyone having that issue before.
Fan still ramps up and down for whatever reason. My oil temps are no more than 230 degrees at speeds of 60+ and hover around 220 for just running around town. At what delta T will the PCM put me in limp mode? My coolant is running about 192 with oil at 225-230. I'm still debating whether or not to do a cab on oil cooler change or the external kit for $1600. If I can put on the external kit and drive this truck another 50k miles, it would be worth it.
Fan still ramps up and down for whatever reason. My oil temps are no more than 230 degrees at speeds of 60+ and hover around 220 for just running around town. At what delta T will the PCM put me in limp mode? My coolant is running about 192 with oil at 225-230. I'm still debating whether or not to do a cab on oil cooler change or the external kit for $1600. If I can put on the external kit and drive this truck another 50k miles, it would be worth it.