Rattle at 3200ish RPM?

[BigMAK]

I would definitely suggest taking a tech for a ride. You know your truck, you know exactly how to make it do the noise. Theres a really good chance that when the service advisor wrote it up it didn't translate to the tech properly how to make your noise and they are driving it in a way that it's not doing it. I feel like no engine or vehicle is perfect and I can tell you from personal experience that the more invasive and more you tear apart the worse off you are. Your leaving alot of room for human error in the 1000 piece puzzle of engine parts. Sometimes you just have to trust in the warranty. Change oil on time with good records, don't modify your truck in a way that arises suspicion that you may be abusing it, and keep It in good repair. When a manufacturer has a major failure, the first thing they look for is a way out. If they see you have bald rear tires and mods under the hood or even a loud exhaust they will think you abuse it. If it looks stock, they don't have a leg to stand on to deny you. If you do break it, break it good. My truck is 80/20 my wife drives it 80% to work and around and I drive it when we're together as a family with the kids on the weekend. If it starts clattering away I'm sending it home all the way! Have my wife call it in and check in the car to service under her name (all her crap is in it) they will think it's lady-driven and threw a rod through the block lol! Life is too short to worry about this crap. If I go to bed every night with buyers remorse I'm going to have a really bad owners experience. Screw it, drive the hell out of it and pretend it's a Mustang GT. Turn up the radio and let it rip!

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[TexasTruck]

Hey guys. I was driving with the rear window open one day and realized that I was hearing a rattle on accelerations. I listened a little more closely and realized that it was only happened at certain RPMs, and mainly around 3200ish RPM. It seems like a harmonic rattle or something - maybe somewhere down the exhaust line maybe? I also hear it under the hood (I think) with the windows closed now that I’m listening for it more closely. Has anyone experienced the same thing?

The numbers don't lie; the 3.5 EB has more TQ than the 5.0, so I took a risk and bought my first 3.5 EB in 2015, then a '17, '18, and '20 before trying the V8 again in '22. Now that I've driven a V8 for 300+ miles, man I missed it. They are just as responsive, as refined, the power is just different, more linear maybe, more anticipated vs. a 3.5 EB.

Any way, I found this thread and I have what seems like the same issue. I'm at 370 miles now, breaking it in as they say, keeping the RPM's around 2-2.5K, slow accel, slow decel, no towing, etc. Yesterday I slowly ran the RPM's up to 3-3.2K and that's when I heard this awful "borla" crap exhaust, rattle, harmonic, reverberating, pinging on a tin drum sound - WTH! I tried it again, and it repeats. It's like the header and/or catalytic converter are resonating badly!

I noticed if I ease up to 3Kish, it's not as bad, definitely not the same exhaust note/tone you hear in the 2Kish range. I haven't tried to idle it and increase the RPM to 3K+, don't want to effect the break in and all that.....

Man what is that noise!

 

[Hockeymandan13]

That is what I have decided to do. Not worth the hassle. I have had two dealerships tell me it's normal or at least present on the other lot trucks the

The numbers don't lie; the 3.5 EB has more HP and TQ than the 5.0, so I took a risk and bought my first 3.5 EB in 2015, then a '17, '18, and '20 before trying the V8 again in '22. Now that I've driven a V8 for 300+ miles, man I missed it. They are just as responsive, as refined, the power is just different, more linear maybe, more anticipated vs. a 3.5 EB.

Any way, I found this thread and I have what seems like the same issue. I'm at 370 miles now, breaking it in as they say, keeping the RPM's around 2-2.5K, slow accel, slow decel, no towing, etc. Yesterday I slowly ran the RPM's up to 3-3.2K and that's when I heard this awful "borla" crap exhaust, rattle, harmonic, reverberating, pinging on a tin drum sound - WTH! I tried it again, and it repeats. It's like the header and/or catalytic converter are resonating badly!

I noticed if I ease up to 3Kish, it's not as bad, definitely not the same exhaust note/tone you hear in the 2Kish range. I haven't tried to idle it and increase the RPM to 3K+, don't want to effect the break in and all that.....

Man what is that noise!

It is indeed a odd noise. I can't for the life of me figure it out. Engine runs strong at 15k been doing it since about 5k. Gonna have to let it sing and see if anything breaks. I think you might be correct in saying it's a resonance issue. By any chance do you have the slight vibration in the gas pedal? I'm trying to see if the two issues are related.

 

[tony72cutlass's']

That is what I have decided to do. Not worth the hassle. I have had two dealerships tell me it's normal or at least present on the other lot trucks the

It is indeed a odd noise. I can't for the life of me figure it out. Engine runs strong at 15k been doing it since about 5k. Gonna have to let it sing and see if anything breaks. I think you might be correct in saying it's a resonance issue. By any chance do you have the slight vibration in the gas pedal? I'm trying to see if the two issues are related.

I have no gas pedal resonance, it sounds like it is on the top end of the engine. It does not happen at idle, but when the engine is under load.

 

[Polo08816]

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.

I don't get the people that say to baby it to the dealer to have them look at it.

If the vehicle is stock, I'm going WOT until the engine turns into kibbles and bits so I get a brand new engine under warranty.

 

[tony72cutlass's']

That is what I have decided to do. Not worth the hassle. I have had two dealerships tell me it's normal or at least present on the other lot trucks the

It is indeed a odd noise. I can't for the life of me figure it out. Engine runs strong at 15k been doing it since about 5k. Gonna have to let it sing and see if anything breaks. I think you might be correct in saying it's a resonance issue. By any chance do you have the slight vibration in the gas pedal? I'm trying to see if the two issues are related.

What did the ones on the lot sound like? Did they actually let you try them?

 

[Hockeymandan13]

What did the ones on the lot sound like? Did they actually let you try them?

I drove another 5.0 and it sounded the exact same. 32 miles on the one I drove. So either it is completely normal or the one I drove was suffering from the same issue. A seperate dealer stated the lot vehicle they drove sounded the same.

 

[Hockeymandan13]

What did the ones on the lot sound like? Did they actually let you try them?

Here's audio from a go pro mounted next to the battery inside the engine bay

 

[TexasTruck]

That is what I have decided to do. Not worth the hassle. I have had two dealerships tell me it's normal or at least present on the other lot trucks the

It is indeed a odd noise. I can't for the life of me figure it out. Engine runs strong at 15k been doing it since about 5k. Gonna have to let it sing and see if anything breaks. I think you might be correct in saying it's a resonance issue. By any chance do you have the slight vibration in the gas pedal? I'm trying to see if the two issues are related.

Maybe a hint of gas pedal vibration just above 3K, but not bad from what I can feel. I don't hold that RPM very long and it up shifts....

 

[TexasTruck]

Here's audio from a go pro mounted next to the battery inside the engine bay

Yep, that sounds a lot like the rattle I hear. It really does sound like exhaust material vibrating.... Are the RPMs above 3K or so as it shifts up?

 

[Hockeymandan13]

Yep, that sounds a lot like the rattle I hear. It really does sound like exhaust material vibrating.... Are the RPMs above 3K or so as it shifts up?

Right at 3200 rpm every time. That's through every gear. Can be replicated if I manual shift down a gear that puts the engine at 3200 rpm. It does sound like something external to the engine but for the life of me I can't find out what.

 

[tony72cutlass's']

I drove another 5.0 and it sounded the exact same. 32 miles on the one I drove. So either it is completely normal or the one I drove was suffering from the same issue. A seperate dealer stated the lot vehicle they drove sounded the same.

Awesome thx that’s very helpful, they havnt let me drive another truck yet at my dealer

 

[tony72cutlass's']

Here's audio from a go pro mounted next to the battery inside the engine bay

THATS IT!!!

so I’m not just losing my beans in my old age

 

[tony72cutlass's']

Right at 3200 rpm every time. That's through every gear. Can be replicated if I manual shift down a gear that puts the engine at 3200 rpm. It does sound like something external to the engine but for the life of me I can't find out what.

I have poked and prodded at everything with hoping to find a piece of plastic or clamp that’s resonating. I think the engine definitely has a resonance at 3200, but it is for sure causing something to rattle

 

[TexasTruck]

I don't get the people that say to baby it to the dealer to have them look at it.

If the vehicle is stock, I'm going WOT until the engine turns into kibbles and bits so I get a brand new engine under warranty.

This reminds me of my '22 purchase. My dealer likes to park new vehicles up on a curbed circular drive area. My salesmen (newbie) said go ahead and put it in 4WD to get down off the curb As we drove away, the fella said these trucks have Drive Modes, here turn the dial to Sport Mode Go ahead and floor it... This is why I try to find the freshest unit... There is a sense of, it's new, baby it, this might be the one I buy...

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