22 Wrangler Diesel

[AC77]

Hello
This has been on my mind. So I thought I’d ask for those who love their cars n trucks and pay attention to everything. Every time maybe I’m being a bit too worried or exaggerated thought process !! BUT. Any of you hear a … light knock a thud of some sort when you start your diesel motor ? Right when it cranks a knock. One time knock.? But it’s not every time. Sometimes on first start. Again this might be a normal diesel start noise I’m first time owner of a diesel truck maybe I’m over thinking. Everything runs fine. No issues

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[NickJar]

I haven’t noticed. You have a brand new vehicle that is still under warranty. Don’t sweat the small stuff and enjoy the amazing jeep

 

[rickinAZ]

Diesel engines used to be described as sounding like ball bearings rattling in a coffee can. While they've come a long way in NVH mitigation, they still retain some of that clattery DNA. It's normal.

 

[AC77]

 

[Terpsmandan]

BTW I love the rattle. They did manage to mask most of it in the Ram Ecodiesel.

 

[NewbJLUOwner]

Hello
This has been on my mind. So I thought I’d ask for those who love their cars n trucks and pay attention to everything. Every time maybe I’m being a bit too worried or exaggerated thought process !! BUT. Any of you hear a … light knock a thud of some sort when you start your diesel motor ? Right when it cranks a knock. One time knock.? But it’s not every time. Sometimes on first start. Again this might be a normal diesel start noise I’m first time owner of a diesel truck maybe I’m over thinking. Everything runs fine. No issues

Yes, sounds like the fuel pump getting going to me. It feels like I'm sitting inside Apollo 13 before take off...lol
Sort of like priming it after fuel filter replacement. My opinion
I wouldn't worry about it, I'm at 9300 miles so far.
Best & Most Fun Engine I've ever driven

 

[the_jeepeo]

Hello
Any of you hear a … light knock a thud of some sort when you start your diesel motor ? Right when it cranks a knock. One time knock.? But it’s not every time. Sometimes on first start. Everything runs fine. No issues

Yes! This exact noise I’ve noticed maybe less than 10 times. It’s a loud asf quick knock. I’m glad someone else brought it up.

It happens so in frequently that I knew it would be near impossible to replicate for a tech.

 

[AC77]

Yea. It’s slightly getting less as the diesel block breaks in further
I’ll keep an eye and ear on it

 

[ssrgeoff]

Funny, I was going to ask this same question. Its a thud and only happens every now and then. Almost 9k on the clock and seems to be okay.

 

[AC77]

I’ve noticed it thinking on when it happens it’s been when firing up if the truck has been sitting for hours. Like over night. When warm. ie driving around Stop here n there. It doesn’t do it … my brother has a 21 ram 3500 Cummins and he said not to worry as it’s a normal sound of a Diesel engine.

 

[the_jeepeo]

Heard it again last night but it wasn't on my Jeep. The loud knock came from a JL Rubicon parked next to me that started up while I was standing next to it. This other Jeep was NOT a diesel and looked/sounded like the 3.6V6. Also, the noise was way louder than I think mine is when it happens. The timing of the noise makes me think it's the starter drive pinion slamming back into the starter because it happens almost instantaneously with the engine starting to run.

 

[AC77]

Hmmmm interesting observation. Makes sense

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