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Since new and now with 3,000 miles my 2019 3.6 Challenger has been making a strange noise that in my opinion sounds like noisy lifters or maybe an exhaust leak? Car is completely quiet at idle. Only time I can hear the noise is when driving slowly and slightly pressing the gas putting a light load on the engine. Noise is worse when cold but never completely goes away. My 2015 SXT never had this issue . I haven't yet been at the dealer but suspect they will tell me that it is normal. I switched to synthetic but that didn't help. Has anyone else had this issue? Thanks
 

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I recently thought I heard the same type of thing in my 2018 GT - when somewhat cold and under moderate throttle at low speed (25-45mph). To me, it sounded like a slight exhaust leak, but I thought it was probably just normal when cold. Really haven't tried to hear if it was there all of the time or what. I'll try to pay more attention...
 

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Maybe.... I'm at about 5k miles on mine. When I heard mine, it was from underneath the car (not from the engine bay), which is why I say that it is most likely exhaust-related. May just be the way they sound when cold... It's warming up here (PA), but I'll make a point to listen for it more closely.
 

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I listened for it again this morning and if I mute the radio and listen for it under moderate throttle, I can here it when cold, but not after the car warms up. To me, it sounds like an exhaust "tick", but it's hard to say. Personally, I'm not going to worry about it. I'll see how it behaves over the summer and after my first oil change (but I suspect it won't change since i think it's exhaust related).

Does it makes sense that an exhaust "noise" would only be audible when the car is cold?
 

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Does it makes sense that an exhaust "noise" would only be audible when the car is cold?
Sure, as the metal gets hot it starts to expand.

The 3.6 has an exhaust manifold that is integrated with the head but there is still a gasket which is where I would start. Maybe try some soapy water to see if you can see where it is leaking on start-up when the system is cold.
 

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I'm just going to add it to the list of minor "issues" for the dealer to look at. Honestly, I'm really not concerned about it - just reporting what I've experienced. If it's a real issue, I'm sure it'll get worse long before my warranty is up (have 7 year/100k mile powertrain warranty since it's a "certified pre-owned" car). It might even just "go away" on it's own after some miles - maybe the carbon will "plug" the leak over time. :)
 

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Could be just aerated lifters, this can happen on new 3.6Ls just from sitting on dealer lots for a while. It takes a bit to to prime them with oil again.

Diagnosis steps states: Run the engine between 2000 and 3000 RPM for three to five minutes. Return the engine to standard idle speed for 30 to 60 seconds. Evaluate noise. If noise is present, repeat the process an additional 4 cycles. If noise is present after additional cycles, take the vehicle on a typical drive cycle.

I say start with that. Also, don't bother looking at 2018+ Jeep forums for an answer. JL Wranglers have the 3.6L Pentastar upgrade, which is a very different engine from the classic 3.6 in the Challenger. They share just a few minor parts like some bolts, oil filter, maybe some gaskets. Any pattern failures or defects on one likely won't apply to the other.
 

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The noise talked about on that forum is not what I've experienced. Mine is not a "rattle" sound - it's just a very minor tick-like sound that "goes with the exhaust". I'm 99% sure it's just a minor exhaust noise when cold. Not even sure it's a "leak" - just a different sound when cold. Definitely not a misfire or engine knock.
 

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Discussion Starter #12
That is good to know that the new Wrangler 3.6 is a different engine. I will bring this issue up with my dealer when I bring the car in for its next oil change. I will let you guys know what they say.
 

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I have a 2018 SXT, and I believe we have the same issue. I took it to the dodge dealership after 3k miles and they told me its normal. Im not sure if they said it was an electric solenoid or something of the sort... I was pretty upset but unfortunately there is nothing I could do about it... Sorry I'm not a professional to remember exactly what they said.
 

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I listened for it again this morning and if I mute the radio and listen for it under moderate throttle, I can here it when cold, but not after the car warms up. To me, it sounds like an exhaust "tick", but it's hard to say. Personally, I'm not going to worry about it. I'll see how it behaves over the summer and after my first oil change (but I suspect it won't change since i think it's exhaust related).

Does it makes sense that an exhaust "noise" would only be audible when the car is cold?
Hello jtrosky,

Keep us updated on this going forward. If you end up going into the dealer for inspection, let us know. Our team is available via direct message and would be happy to help.

Jasmine
Dodge Social Care Specialist
 

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I listened for the noise this morning, which was significantly warmer than previous mornings when I did hear the noise - and there was no noise at all this morning. So ambient temperature definitely plays a part.

This morning it was about 55F degrees. Previously, when I could hear it (only if I muted the radio and listened for it), it was below 40F degrees.

I'm not concerned and will just consider it "normal", unless it gets much worse or something.
 

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Discussion Starter #17 (Edited)
Well I know for sure the noise in my 2019 is not normal. Reason being my 2011 Charger and 2015 Challenger both with the 3.6 did not make this noise. With the radio turned off , you can usually hear it upon moderate acceleration. Sounds like exhaust leak or lifter noise, definitely coming from engine. Next tank of gas I will try 93 octane just to rule our detonation.
 

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For what it's worth, I always use 93 octane in my 2018 GT and I still heard the noise when colder out, so I truly don't believe it's anything to do with knock.

I'm also not really sure that we're even talking about the same thing yet either..

See if you can get a recording of it and I'll do the same (if temperature dips down far enough again). What is the temperature like where you are at when it happens? Even when the car was cold, I couldn't here it all at this morning when it was ~55F out...
 

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Discussion Starter #19
Up here the temp is still in the 30's most of the time. The noise is a little louder when cold but still there after the engine is fully warmed up. Its not a loud noise so I doubt it could be heard in a recording.
 

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Found this information for you.


The Pentastar 3.6L engine in Dodge vehicles has had two common faults since its introduction in 2011, the first being that advanced exhaust cam phasing can trigger an engine warning light; this has no negative performance effects. The second, more serious, issue is overheating and failure of engine heads.
The cylinder head problem in the Chrysler Pentastar 3.6L engine affects the left bank containing cylinder number two. Symptoms first appear as a ticking sound coming from that cylinder, followed by misfire conditions, loss of power and possible stalling. The design flaw is reportedly fixed in models manufactured from 2012 but it is believed that 7,500 earlier vehicles may be susceptible to left cylinder head cracks. Chrysler has extended the five year/100,000 mile warranty to ten years or 150,000 miles on the left cylinder head of vehicles prone to the failure. Warranty bulletin D-14-12 of June 10, 2014, is available from dealers and contains details of which vehicles are covered.
The 3.6L V6 is the first of the Pentastar family of motors. It comes as the standard engine in the: Dodge Challenger and Charger, Jeep Grand Cherokee and Wrangler, Ram Promaster and 1500, and Chrysler 300. The Pentastar is optional on both the Dodge Avenger and Chrysler 200.
 
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