Rattling upon acceleration

[kburns]

Jesus... Please keep us updated. Was your noise constant or was it in low RPM like ours?

I will. Still waiting for them to call me that its fixed as of 6/29/2019. It happened as soon as it turned on and was idling. rev the engine the sound went away. Only when idling. Sounded horrible

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[Kevin8086]

Was able to record it. Any ideas?

That’s detonation

 

[kburns]

Cracked flywheel it was! So the bolts holding the flywheel were loose and it just cracked on its own from running. Crazy!

 

[DougJaneway]

Cracked flywheel it was! So the bolts holding the flywheel were loose and it just cracked on its own from running. Crazy!

Yeah, I don't think this is related at all to our knocking issue.

 

[Duran2019]

So, I took a video and if you have the volume up and/or wear headphones you can clearly hear the rattle/knocking or whatever it is. My JL has been doing this since the I got it, but didn't notice it for awhile, because I always had the radio on. You can hear right at the start of the video for a second, then at 12-16 seconds and then 28-42 seconds. It does it consistently, but I can sustain it around 30-34mph when it has settled into gear and gently press the gas (that is 28-42 seconds at about 34mph) If anyone that hears it can tell me if you JL does the same or if you know what the problem is that would be great. I am about to schedule a trip to the dealer. Thanks!

Your video sounds exactly like the issue I was having on my 2018 JLU Sport. Would hear it on and off specially on lower speeds (10-25mph) while engine was at low RPMS and running warm. At first dealer said they could not replicate but they "checked" the heat-shield anyway and I was told everything appeared to be tight and secured. I had to test drive it with them to replicate the noise. Dealer thought it was "Engine Ping". After 3 days they call me and say they are back to the "Heat-shield theory", but could not find which one so they decided "removed all the heat-shields" (dealer didn't specify which ones) Technician re-installed them all.

I have had my car back for 5 days and have not been able to hear that "rattle" from under. Hope this helps.

 

[Duran2019]

Your video sounds exactly like the issue I was having on my 2018 JLU Sport. Would hear it on and off specially on lower speeds (10-25mph) while engine was at low RPMS and running warm. At first dealer said they could not replicate but they "checked" the heat-shield anyway and I was told everything appeared to be tight and secured. I had to test drive it with them to replicate the noise. Dealer thought it was "Engine Ping". After 3 days they call me and say they are back to the "Heat-shield theory", but could not find which one so they decided "removed all the heat-shields" (dealer didn't specify which ones) Technician re-installed them all.

I have had my car back for 5 days and have not been able to hear that "rattle" from under. Hope this helps.

Sorry I lied. I’m back at the dealer. Called Jeep support to help dealer troubleshoot.

 

[DougJaneway]

So, just a theory. I think my dealer may have been putting the wrong oil in the last two oil changes. Any of you change your own oil having this issue? I just changed it myself and refilled with 0w20 Pinzoil Platinum with a K&N filter and have had zero rattle noise. Also, when I drained the old oil, it looked a little thick. We'll see if it lasts.

 

[SuperNerdEE]

So I've tried the higher octane gas recommendation with really no success. Just wanted to add that as a datapoint to this community. Looks like Duran2019 had luck with reinstalling heat-shields. Anyone else had luck with that?

Wait, never mind. I see that the issue is still persisting.

 

[Duran2019]

So I've tried the higher octane gas recommendation with really no success. Just wanted to add that as a datapoint to this community. Looks like Duran2019 had luck with reinstalling heat-shields. Anyone else had luck with that?

Sorry for the miss information. I spoke too soon. The heat shields re install did not work. I was told to us two full tanks of octane 92 as well. I haven’t had the chance to test.

 

[DougJaneway]

Can anyone follow up with if they are changing their own oil and what weight/brand they are using? I haven't had an issue since I changed my own oil with Penzoil Ultra Platinum 0w20 with a K&N filter.

 

[Snowshoes]

Can anyone follow up with if they are changing their own oil and what weight/brand they are using? I haven't had an issue since I changed my own oil with Penzoil Ultra Platinum 0w20 with a K&N filter.

I use Pennzoil Ultra Platinum 0w20 and mopar filter. Did 4 oil changes so far. I still hear rattling noise. I tried 2 tanks of 91 octane. It only helped a bit. I believe it's the tune issue like other member said. It's freaking annoying.

 

[CZ 75]

ive done a few of my own oil changes also with pennzoil platinum with the mopar filter. no effect on the preignition. going to try amsoil next.

 

[calman]

Any updates to this thread? Dealership utterly useless. They put a few clamps on the muffler assembly insisting the rattle was coming from muffler vibration that is... wait for it.... "normal". I have otherwise run many tanks of premium fuel but the rattle persists. Any new info would be appreciated.

 

[DougJaneway]

Any updates to this thread? Dealership utterly useless. They put a few clamps on the muffler assembly insisting the rattle was coming from muffler vibration that is... wait for it.... "normal". I have otherwise run many tanks of premium fuel but the rattle persists. Any new info would be appreciated.

I've been running BP midgrade and it helps a lot. Doesn't completely stop it. It's a tuning issue that is going to require a recall or a TSB with new tuning. The dealers aren't going to be able to fix this without corporate support. This is very frustrating @JeepCares

 

[calman]

Thanks. Running higher octane didn't help with my rattle unfortunately.

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