3k RPM Engine Rattle - unresolved

[MVTV]

I’ve got a manual 2023 Mojave with 29,000 miles. Around 5,000 miles I heard a weird engine rattle when the ambient temp was north of 90 F. Engine rattle starts at 2,800 RPM and gets louder at 3,000. Happened once in a blue moon but around 26,000 miles it started happening pretty often. Even with low engine temps.

Apparently Jeep just released a diagnostic check by viewing the oil control valve. Apparently mine would get stuck when the engine was warm. Jeep just replaced the oil control valve and phasers on the left side. They also said they checked all the lifters/rockers and they are good.

Sadly, noise is still there. There are a couple threads on this topic but solutions seem to vary (at least from what I read). Anyone have any advice on what else to check?

Side note - I’ve always put 91 octane in

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[Thunderspud]

Can't help, unfortunately. But why does the title of this post say "Solved"?

Edit: It's changed now. Carry on. Good luck.

 

[MVTV]

Another video to hear the noise better.

Can't help, unfortunately. But why does the title of this post say "Solved"?

Ha! I started writing this post when Jeep said the work was finished and they fixed the issue. I wanted to tell people they just released a “fix”. But when I got the jeep back it wasn’t fixed. Definitely not solved

 

[Thunderspud]

Judged purely by the audio, it doesn't really scream "engine issue" to me. Are there any other symptoms? Vibration maybe?

 

[Maximus Gladius]

If I were trying to find/locate the source of this noise I would secure my phone or recording device to the front, then the back of the engine and see which one is louder. Start there.

Can this noise be reproduced in Park and hitting the throttle?

 

[MVTV]

If I were trying to find/locate the source of this noise I would secure my phone or recording device to the front, then the back of the engine and see which one is louder. Start there.

Can this noise be reproduced in Park and hitting the throttle?

Once it starts it doesn’t stop till you turn off the engine. Happens even in neutral, when it’s happening.
I’ve heard it’s clutch related which I disagree with. You can touch the clutch when it’s happening and makes no difference. Also happens when under load vs not.

My main concern is ignoring it, engine goes boom and I’m out of warranty.

 

[Gvsukids]

Once it starts it doesn’t stop till you turn off the engine. Happens even in neutral, when it’s happening.
I’ve heard it’s clutch related which I disagree with. You can touch the clutch when it’s happening and makes no difference. Also happens when under load vs not.

My main concern is ignoring it, engine goes boom and I’m out of warranty.

Sounds like you need to go back and have the dealership fix it.

 

[ShadowsPapa]

Once it starts it doesn’t stop till you turn off the engine.

In this case, that rather negates the harmonics issue or MT only rattle issue.
But do you mean it rattles all the way back down to idle until you turn it off, or, it's always up at the higher RPM until you shut down?
Two ways to take that.

My main concern is ignoring it, engine goes boom and I’m out of warranty.

If you have concerns on record, with repair orders on record, then if the later problem is caused by the issue on record, it would be covered.

 

[MVTV]

In this case, that rather negates the harmonics issue or MT only rattle issue.
But do you mean it rattles all the way back down to idle until you turn it off, or, it's always up at the higher RPM until you shut down?
Two ways to take that.



If you have concerns on record, with repair orders on record, then if the later problem is caused by the issue on record, it would be covered.

Rattles only when at 2.8k and up RPM. Not at idle. If the rpm’s go below 2.8k it’ll go away. Once it starts the issue doesn’t stop (rattle above 2.8k rpm) until you shut down the engine.

I’ll take it back but they don’t know what to look for anymore.

 

[Maximus Gladius]

I’ll take it back but they don’t know what to look for anymore.

This is where you need to secure a recording device around until it sounds the loudest and tell the tech. These guys only have a certain amount of time allotted to them. Beyond that, they can’t take the time for it.

 

[ShadowsPapa]

I wonder if one could run these with the solenoids disconnected - to prevent the phasers from operating.
I'd be interested in monitoring oil pressure vs. when the sound starts, and even using JSCAN to monitor when things kick in and so on.

 

[MVTV]

This is where you need to secure a recording device around until it sounds the loudest and tell the tech. These guys only have a certain amount of time allotted to them. Beyond that, they can’t take the time for it.

Once while it was happening I drove it to the dealership and rode in it with the tech. He drove it and was able to hear it. Thats why they did the oil control valve check. They know it’s happening.

 

[MVTV]

I wonder if one could run these with the solenoids disconnected - to prevent the phasers from operating.
I'd be interested in monitoring oil pressure vs. when the sound starts, and even using JSCAN to monitor when things kick in and so on.

Apparently the check they did was something similar. They remove the oil control valve cover and view the oil control valve with a scope. They could see it improperly working and replaced it (and phasers).

 

[Hootbro]

Does it do it when parked and rev through 3K RPM?

Almost sounds like a exhaust heat shield vibration.

 

[Sandman 4x4]

Is the rattle noise consistent in neutral only? What happens when you push the clutch in does the noise change at all?

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