Rattle at 3200ish RPM?

[Hockeymandan13]

So this is actually really interesting. Maybe not a replaced part, but different oil. I was talking to a friend of mine who was a Ford tech for a few years working on the coyote. He was saying that it could actually be the phasers. He suggested using a thicker oil next time I change the oil which I'm planning on trying.

My next oil change isn't for a while, so if someone reads this and is planning on doing an oil change before me, try this and let us know!

I have tried royal purple, penzoil Plat and no change to the noise.

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[tony72cutlass's']

Back to the top, has anyone gotten this resolved?

I just noticed that i thought it was temperature related, but my rattle seems to go away when it's raining (very humid)

 

[Hockeymandan13]

Back to the top, has anyone gotten this resolved?

I just noticed that i thought it was temperature related, but my rattle seems to go away when it's raining (very humid)

Been to 2 dealers a total of three times, compared to others on the lot and had the same issue. No fix needed per both dealerships so it appears to be a characteristic of the engine.

 

[tony72cutlass's']

Been to 2 dealers a total of three times, compared to others on the lot and had the same issue. No fix needed per both dealerships so it appears to be a characteristic of the engine.

Wow same sound eh?

I just find it very odd that i was driving to work in the rain this morning and the engine purred like a kitten right through the 3,000's

Part of me wants to go out and buy one of these to try to diagnose it.

 

[Hockeymandan13]

Wow same sound eh?

I just find it very odd that i was driving to work in the rain this morning and the engine purred like a kitten right through the 3,000's

Part of me wants to go out and buy one of these to try to diagnose it.

Yea best we can come up with is a fuel management/timing strategy that is causing pre det combined with DI noise under certain conditions. If I run mine enthusiastically it will run perfectly, but when I cruise for a while then get on the throttle it will give a small flutter at 3200 rpm. Sport mode seems to eliminate it at times as well. Another forum mentioned running 93 Oct and it went away which would reinforce the pre det theory. Ford does milk every last MPG. I have yet to try a few tanks of 93 die to cost at the moment.

 

[66F100Again]

You mentioned it didn't rattle when it was raining out.
If I'm not mistaken, don't hot rodders sometimes use water injection in the intake so they can run more spark advance without detonation?
This might support your suggestion that it's a fuel management / spark management issue.
I also wonder if this could have anything to do with the cylinder deactivation feature.
My 5.0 doesn't do the rattle; I also haven't been able to detect cylinder deactivation in the 8000 miles I've driven it.

 

[Hockeymandan13]

You mentioned it didn't rattle when it was raining out.
If I'm not mistaken, don't hot rodders sometimes use water injection in the intake so they can run more spark advance without detonation?
This might support your suggestion that it's a fuel management / spark management issue.
I also wonder if this could have anything to do with the cylinder deactivation feature.
My 5.0 doesn't do the rattle; I also haven't been able to detect cylinder deactivation in the 8000 miles I've driven it.

Not sure on the humidity of the air, maybe since the density of the air changes when it rains the MAF picks up and adjusts timing accordingly. (if it is a fuel management/timing management strategy). I have not payed attention to the issue in relation to rain.

As for cylinder deactivation, I have had mine disabled for the past few days to test and it didn't have an affect.

Wonder if anyone has reached out to a tuner (if they have gotten tunes rolling for the 21s) to see if they have noticed a condition in the factory programming that would contribute to this noise at the specified rpm.

 

[tony72cutlass's']

So I was poking around the engine bay today and I notice the Intake rattling a bit when I hit it.

i jammed a piece of cardboard under the driver side tie down. Seems to have really helped the rattle. Could just be a coincidence. Anyone else willing to try it on theirs and confirm?

 

[tony72cutlass's']

Anyone get this figured out? It's been pretty persistant all year and it's driving me crazy (above solution did not work with the piece of cardboard).

 

[BigMAK]

Hi all, just discovered this post today when Google searching 5.0 valvetrain noise. So I have a 2022 5.0 4k miles S-crew 4x4. On hard acceleration right at 3,000 rpm and above makes a rattle from the top end of the engine. Definitely not lower, too high pitched. I took a brand new 2022 5.0 for a ride, accelerated hard, heard it slightly and thought it was normal. Mine is way more pronounced and the more I listen to it and manipulate RPM, load, and noise I found that if I manually shift it and hang it at 3000, 3500, 4000 rpm and let off the throttle it doesn't seem to be as loud. When I give it gas I hear it more. (Running Shell 87 Octane currently) I heard it could be "Octane knock" and was told use e-85 because it's 100+ Octane (burns 33% more than fuel and haven't tried yet) kinda thinking I might just send it until the knock/tap works it's way out (like through the engine block). Taking it in Friday for oil change #1 and a look. Will update you all.

 

[tony72cutlass's']

Hi all, just discovered this post today when Google searching 5.0 valvetrain noise. So I have a 2022 5.0 4k miles S-crew 4x4. On hard acceleration right at 3,000 rpm and above makes a rattle from the top end of the engine. Definitely not lower, too high pitched. I took a brand new 2022 5.0 for a ride, accelerated hard, heard it slightly and thought it was normal. Mine is way more pronounced and the more I listen to it and manipulate RPM, load, and noise I found that if I manually shift it and hang it at 3000, 3500, 4000 rpm and let off the throttle it doesn't seem to be as loud. When I give it gas I hear it more. (Running Shell 87 Octane currently) I heard it could be "Octane knock" and was told use e-85 because it's 100+ Octane (burns 33% more than fuel and haven't tried yet) kinda thinking I might just send it until the knock/tap works it's way out (like through the engine block). Taking it in Friday for oil change #1 and a look. Will update you all.

what you are describing is exactly what I am seeing with my truck, if I can make a recommendation, have your dealer inspect before the oil change, with my truck the only two times it went away for a day was with fresh oil (then came back the next morning)

 

[BigMAK]

Update: Took the truck in Friday 10/21/22 went for a ride with a 20+yr. Senior Master that specializes in engines. I drove the vehicle in a way to duplicate the noise, he heard it. Said its definitely not octane knock, (I'm running Shell 93 V-power) couldn't figure out what it was. We discovered it really doesn't do it much in park or neutral while revving to 3000-3500 RPM. Vehicle has to be under load. Gave it its first oil change 4,400 miles with Motorcraft Synthetic blend 5w30 7.7qts. As it should be. Filtered the oil through a paper towel on the way out, no metal or anything abnormal. Oil was black and dirty. Let it completely drain for 15 minutes (no more drips from oil pan). Verified oil level was full. Test drove, same noise. Discussing it with the tech, rather than open the engine and throw the farm at it and have it bever be the same again, I have warranty on this brand new truck, if it's not a normal characteristic of this engine it's getting a full send until it comes apart. I'm not going to half-ass repair this new truck with heads, cams, valve springs or whatever cheap repair Ford wants to do.

 

[tony72cutlass's']

Update: Took the truck in Friday 10/21/22 went for a ride with a 20+yr. Senior Master that specializes in engines. I drove the vehicle in a way to duplicate the noise, he heard it. Said its definitely not octane knock, (I'm running Shell 93 V-power) couldn't figure out what it was. We discovered it really doesn't do it much in park or neutral while revving to 3000-3500 RPM. Vehicle has to be under load. Gave it its first oil change 4,400 miles with Motorcraft Synthetic blend 5w30 7.7qts. As it should be. Filtered the oil through a paper towel on the way out, no metal or anything abnormal. Oil was black and dirty. Let it completely drain for 15 minutes (no more drips from oil pan). Verified oil level was full. Test drove, same noise. Discussing it with the tech, rather than open the engine and throw the farm at it and have it bever be the same again, I have warranty on this brand new truck, if it's not a normal characteristic of this engine it's getting a full send until it comes apart. I'm not going to half-ass repair this new truck with heads, cams, valve springs or whatever cheap repair Ford wants to do.

Very interesting info! what are they proposing that the problem is, or is the truck still at the dealership and they’re looking into it?

 

[BigMAK]

I took the truck home. I'm friends with the tech and I know he wasn't giving me b/s hes a great engine/drivability tech. I asked if he thought it was lifters he told me to put it in park and hold it at 3500, noise was barely noticeable. He said "I don't know" "sure sounds like it shouldn't be there". He also said that's going to be a rough one because internal engine noise doesn't go away when in park and being replicated. So o got the hint that this was going to be a hard diag that's going to waste everyone's time and have the truck torn apart trying different parts that may or may not fix it. Not going down that road. If it breaks, im breaking it good. Nothing short of a long block. Time will tell.

 

[tony72cutlass's']

I took the truck home. I'm friends with the tech and I know he wasn't giving me b/s hes a great engine/drivability tech. I asked if he thought it was lifters he told me to put it in park and hold it at 3500, noise was barely noticeable. He said "I don't know" "sure sounds like it shouldn't be there". He also said that's going to be a rough one because internal engine noise doesn't go away when in park and being replicated. So o got the hint that this was going to be a hard diag that's going to waste everyone's time and have the truck torn apart trying different parts that may or may not fix it. Not going down that road. If it breaks, im breaking it good. Nothing short of a long block. Time will tell.

great info thanks for sharing, I’m feeling like that’s probably what I will get from the dealer as well, I’ve already brought it in twice but they claim they can’t hear it and suggested I go for a ride along with a tech

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