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2. If you buy the truck replace the rear shocks, the OEM ones are not good and the light weight aluminum bed makes it worse. If you get Blistein prime and paint before installing, the zinc plating is not good. I took mine off today to paint tomorrow before winter sets in (salt). Fox 2.0 is a good alternative, too. Replacing is an easy driveway job.
Stupid question. Rear shocks Fox 2.0 replacement, can they be used with stock level in the rear?
Has anyone found a fix for it yet? I'm in contact with Ford Canada and they want me to bring the vehicle back to a different dealership. Couldn't get an appointment till Jan 2nd. Will keep updating you guys.In the meantime if anyone has a found a fix for it please chime in. Thanks.
On the mustang forum there is a recent idea that the low rpm oil pressure bypass could be contributing to it. The 2018+ 5.0 reduces oil pressure to a low number at low engine speeds. I don’t think anyone has tried unplugging the solenoid valve yet to see if it changes.
On the mustang forum there is a recent idea that the low rpm oil pressure bypass could be contributing to it. The 2018+ 5.0 reduces oil pressure to a low number at low engine speeds. I don’t think anyone has tried unplugging the solenoid valve yet to see if it changes.
On the mustang forum there is a recent idea that the low rpm oil pressure bypass could be contributing to it. The 2018+ 5.0 reduces oil pressure to a low number at low engine speeds. I don’t think anyone has tried unplugging the solenoid valve yet to see if it changes.
I've thrown this theory around for some time (oil pressure control solenoid) but it's very difficult to pinpoint. In the 3.5 version of this thread, Harry Franklin was saying he's never seen any changes in oil pressure when the rattle occurs. However...I also have posted several graphs showing two very different linear trends with EOP_PRESS vs. RPM....which at least is causing my engine to tear itself apart ( a 2016 ). My issue is related to the OPCS...and possibly the PCM since there are other electrical issues with my ETB and TCC. The same thing could be happening on 2018+ (I think they're still using copperhead)...if anyone has forscan, plug it in, data log EOP_PRESS and RPM (2018+ may have the actual commanded solenoid PID available as well). I'd be curious to see the logs vs the rattle....
Also, as noted above, it's not just 2018+ that have this. This particular solenoid goes all the way back to 2015's as well (and possibly farther). It's also the same solenoid that acts as the VVT solenoid for other Ford motors....
Here's the part (same as on the 2015+ 5.0) in case anyone wants to know where it is:
I still think that the one thing that's similar between both the 3.5 and 5.0, however; is the hydraulic tensioner. It could be causing a lot of this.
I've thrown this theory around for some time (oil pressure control solenoid) but it's very difficult to pinpoint. In the 3.5 version of this thread, Harry Franklin was saying he's never seen any changes in oil pressure when the rattle occurs. However...I also have posted several graphs showing two very different linear trends with EOP_PRESS vs. RPM....which at least is causing my engine to tear itself apart ( a 2016 ). My issue is related to the OPCS...and possibly the PCM since there are other electrical issues with my ETB and TCC. The same thing could be happening on 2018+ (I think they're still using copperhead)...if anyone has forscan, plug it in, data log EOP_PRESS and RPM (2018+ may have the actual commanded solenoid PID available as well). I'd be curious to see the logs vs the rattle....
Also, as noted above, it's not just 2018+ that have this. This particular solenoid goes all the way back to 2015's as well (and possibly farther). It's also the same solenoid that acts as the VVT solenoid for other Ford motors....
Here's the part (same as on the 2015+ 5.0) in case anyone wants to know where it is:
I still think that the one thing that's similar between both the 3.5 and 5.0, however; is the hydraulic tensioner. It could be causing a lot of this.
I have thought a lot about chain stretch or tensioner also.
if it was the tensioner, would it be noisy right from the engine first starts up? Would it rattle in gear or in park or both?
For the 3.5 ecoboost there’s some kind of locking mechanism in the vct sprocket that clicks off after about a minute of running and it rattles after that. No rattle until after the click or if the transmission is not in gear. (I used a GoPro under the hood to check it) after a minute of idling there is actually a click sound followed by an immediate slight rattle. The rattle seems to be getting worse (louder and longer) as time goes on, and also has begun to rattle both on and off throttle. Not good.
I have thought a lot about chain stretch or tensioner also.
if it was the tensioner, would it be noisy right from the engine first starts up? Would it rattle in gear or in park or both?
For the 3.5 ecoboost there’s some kind of locking mechanism in the vct sprocket that clicks off after about a minute of running and it rattles after that. No rattle until after the click or if the transmission is not in gear. (I used a GoPro under the hood to check it) after a minute of idling there is actually a click sound followed by an immediate slight rattle. The rattle seems to be getting worse (louder and longer) as time goes on, and also has begun to rattle both on and off throttle. Not good.
With the tensioner, the thought is that it's not properly dampened...so when there's a quick change in tension, the tensioner is not quick enough to respond until after the hydraulic charge is heated up. At least that's my theory with the tensioner. As for the locking pin...that's possible too. However...the locking pin (or pins since these have midlock) just keeps the actuator from moving around while oil hasn't been fully charged into the chambers between the vanes. Without oil (or enough oil), the vanes will slap around...and yes...could cause the rattle due to the rapid change in angular position.
So...could be oil pressure not being sufficient.
Could also be the tensioner.
My guess is that it's some combination of both. The tensioner should be able to handle those types of rapid changes in tension (the ones that would be caused by low oil pressure to the sprocket).
On the mustang forum there is a recent idea that the low rpm oil pressure bypass could be contributing to it. The 2018+ 5.0 reduces oil pressure to a low number at low engine speeds. I don’t think anyone has tried unplugging the solenoid valve yet to see if it changes.
Though my experience is with the 3.5, I tested this theory many months ago with no success. I would highly advise against disconnecting anything having to do with the variable vane oil pump and I say that from experience. At least on the 3.5, the oil pressure is not reduced at times that the noise is happening. Let me see if I can find my data. It's posted in the 3.5 thread.
Last edited by Harry Franklin; 12-18-2018 at 07:39 PM.
12-16-2018, 01:24 AM
