Why so noisy ?

[Roky]

If the 3.6 pentastar in the jlur is essentially the same engine that’s in my 2018 ram work truck, why is the Jeep engine so much noisier? The truck engine is 305 horsepower as opposed to 285 in Jeep, and you can’t hear it running. Why do you think they didn’t put the truck version in the Jeep? Sorry if this has already been asked and answered but I haven’t read anything yet to explain it.
Thanks

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[The_Phew]

WHAAAT? Sorry, I couldn't hear you over the noise of your engine.

I expect the answer is that the engines sound about the same on their own, but the Ram truck has more insulation/damping/muffling/etc.

 

[JIMBOX]

Mine is quiet as a mouse--until--

My exhaust is sensitive to RPM/LOAD, but yours--

May be loud because of the FAN NOISE--

Mine was, the first 100 miles, then the FAN "BROKE IN" and now the engine COMPT is quiet !

Good luck

JIMBO

 

[RamMan]

That fan noise is why your A/C works so well. Turn off your A/C.

 

[DaK]

I think this engine is quiet, especially when compare to my 3.8 SC'ed wrangler. Guess it is all a matter of what you are used to fm other vehicles.

 

[jgreene0717]

Your not the only one. Mine sounds the same at idle. Only does it when up to operating temp. Only thing I dislike about it.

 

[Blu bi Kong]

Dodge Rams aren't ready to tackle the Mojave Road for 165 miles with heat of 110 plus going 2mph with AC blowing.
I'll take my noisy Jeep over the ram. Acura, BMW, Jaguar, Porsche and others all make quiet- cushy sure to get stuck where we can go vehicles if those things are too on the list....

 

[ParaFrogAZ]

The answer to this is addressed by the lead engineer for the JL model in the link above. I personally feel that this is "engineering side-stepping" (where you state the intent of your design instead of addressing the problem.) The fan is excessively loud because it is operating at the high end of its curve. It is most definitely undersized and should truly be addressed by the engineering team. It genuinely irritates me when they act like "it is what is" nor should we accept in inferior design.

 

[RussJeep1]

... I personally feel that this is "engineering side-stepping...

You're absolutely entitled to those sentiments; they are many times accurate.

At the risk of telling you the obvious, design is a tug of war sometimes between competing ends, as well as a balancing act.

FCA has to figure out where thresholds should be set, and how changing those thresholds for better or worse, will affect customer interest and FCA's cost of production. It is hard to be all things to all people, but it is easy to say, even if FCA is not desirous in doing so, "listen, we could have made XYZ better but it would have raised our costs, and we didn't want to pay for it, so we figured out what transferring those costs on to the customer would be, rather than maybe splitting those cost with them, and how it would affect sales.

We considered how many people need or would use that feature, and if the aftermarket could develop product that we don't include either stock or as an accessory."

FCA management doesn't give a rat's ass about its owners. Wait--I'll qualify that in a second. Nor should they.

FCA management is beholden to the stock owners. Their job is to maximize their profit.

Clearly, keeping customers happy helps that profit, and that's why they do consider customers, as they should....but that consideration is a means to a loftier end: profit. They want to do right by rig owners, but where choice has to be made between rig and company owners, decisions get made in favor of the latter: and it's not even greed so much, but an executives contractual obligation to act this way. Of course sales affect bonuses, so there's a greed component to it too.

...and as a share owner that would be what just such a person would expect and be entitled to.

I'll tell you Greg, I't would be refreshing and shocking though to here someone at FCA say, implement feature "X?!!. Do you know how much that would eat into our [stock holder's] profit?"

 

[Cov]

You can make the Wrangler as quiet as a mercedes if you just insulate every single thing possible

 

[ParaFrogAZ]

You're absolutely entitled to those sentiments; they are many times accurate.

At the risk of telling you the obvious, design is a tug of war sometimes between competing ends, as well as a balancing act.

FCA has to figure out where thresholds should be set, and how changing those thresholds for better or worse, will affect customer interest and FCA's cost of production. It is hard to be all things to all people, but it is easy to say, even if FCA is not desirous in doing so, "listen, we could have made XYZ better but it would have raised our costs, and we didn't want to pay for it, so we figured out what transferring those costs on to the customer would be, rather than maybe splitting those cost with them, and how it would affect sales.

We considered how many people need or would use that feature, and if the aftermarket could develop product that we don't include either stock or as an accessory."

FCA management doesn't give a rat's ass about its owners. Wait--I'll qualify that in a second. Nor should they.

FCA management is beholden to the stock owners. Their job is to maximize their profit.

Clearly, keeping customers happy helps that profit, and that's why they do consider customers, as they should....but that consideration is a means to a loftier end: profit. They want to do right by rig owners, but where choice has to be made between rig and company owners, decisions get made in favor of the latter: and it's not even greed so much, but an executives contractual obligation to act this way. Of course sales affect bonuses, so there's a greed component to it too.

...and as a share owner that would be what just such a person would expect and be entitled to.

I'll tell you Greg, I't would be refreshing and shocking though to here someone at FCA say, implement feature "X?!!. Do you know how much that would eat into our [stock holder's] profit?"

I actually don't disagree with what you stated, from a corporate perspective. With that said, Im also not willing to give them a pass on poor engineering either. FCA can not (nor should they be) all things to all people. There will always be features or improvements that we wish were there. For instance, how long do we have to wait for automatic down AND up on ALL the windows? How much does that really cost? How have other manufacturer's figured out how to do it cost effectively? I digress however...

Providing a sub par solution at the danger of brand reputation is never acceptable, but does happen. I have faced with this reality many times in my professional career and while I (or my team) will not present a solution that is simply a bad practice, there have been times were we have been "overruled" whether leadership was willing to gamble the risk or the client didn't wish to pay for it. No engineer wants to hear that their design is bad, but reasonable and experienced ones will listen and try to solve the problem other ways until an acceptable solution is obtained.

I understand the tug of war. But I also understand (and appreciate the checks and balances) that there is a difference between getting from ideal to acceptable versus cutting corners. The notion that they act as if there is no problem, just irritates me. There is a fine line between acceptable and not acceptable. As a consumer, I can tell you it's not acceptable to me. That same line is there for the engineer responsible for the design and if they feel this is acceptable, i question the integrity of their design fundamentals. I guess time will tell and I am willing to predict that the excessive fan noise wont be there in the 2020 model production. It wont be there because they will have either exercised the engineering team to find an alternate solution with existing components, the fan performance will be improved or the current design will be completely re-designed. The only difference is that I and every other JL owner will be left with solving the problem ourselves with aftermarket parts.

 

[jl73660]

My 3.6 JLUS is very quiet and do not hear excessive fan noise.

 

[jgreene0717]

I don't believe he was talking about fan noise. Talking about what the engine sounds like at idle. Mine is noisy. Not sure what it is, but it only does it when up to operating temp 195f. Noisier than JK 3.6, TJ 4.0, etc. By far noisiest engine I have owned. Maybe I got a dud not sure. It is annoying to say the least. Sounds like a diesel like op stated above.

 

[TravisRogers]

The answer to this is addressed by the lead engineer for the JL model in the link above. I personally feel that this is "engineering side-stepping" (where you state the intent of your design instead of addressing the problem.) The fan is excessively loud because it is operating at the high end of its curve. It is most definitely undersized and should truly be addressed by the engineering team. It genuinely irritates me when they act like "it is what is" nor should we accept in inferior design.

There are two sets of videos about the JL I can't stand – that annoying Jeep couple and this one. It's like when Obama would do a "hard hitting" interview on the Today Show with questions like, "Why are you so awesome?" and "Is it hard being a dad?"

 

[NathanG]

There is a tsb to fix the fan noise. They just slow it down a bit.

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