Diesel Noise Question

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Sep 12, 2018 | 08:44 PM

#16

wfedwar

Elder User

Joined: Jan 2004

Posts: 566

Likes: 3

From: Florence SC

I believe a lot of the noise is cut down by “pilot injection”. In fact, at low temperatures, pilot injection is not used and you can hear a lot more engine noise until the engine warms up. Google “pilot injection”; the articles can explain it better than I can.

Sep 12, 2018 | 10:44 PM

#17

EO2SeaBee

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Joined: Nov 2013

Posts: 10,107

Likes: 96

From: Hempstead, TX

On the push to start systems, if you push the start button before putting your foot on the brake pedal, you will see the glow plug light in the lower right of the instrument cluster. It will glow for a second or two, except when you've already been running a bit and the engine is already hot. After the glow plug indication goes off, step on the brake pedal and push the start button again to start the engine. It will start without delay if you don't do the first step.

Sep 12, 2018 | 11:34 PM

#18

hobbie1

Tuned

Joined: Mar 2018

Posts: 472

Likes: 24

From: Brentwood CA

Quote:

Originally Posted by RONMCHUGH

I also came from a Cummins and I agree that this truck is really quiet and fast to start !!!!

Same here - had a 14 RAM with a Cummins - no comparision way quieter and way way way - quicker...... acceleration + no dead pedal

Sep 12, 2018 | 11:42 PM

#19

BullitF250

New User

Joined: Aug 2018

Posts: 15

Likes: 0

From: COLORADO

It will get a little noisier as it breaks in. At least mine did, on the test test drive it was super quite. 2500 miles later it is definitely noticeable now.

Sep 13, 2018 | 08:12 AM

#20

eryoung

Tuned

Joined: Jan 2005

Posts: 433

Likes: 57

From: Bridgewater Ma

My 2017 is a little noisier thank God!! LOL , just turned 9 thousand miles. I do miss the sound of my 2005 but that's all I miss about it, although it was a good truck. Kept it stock.

Sep 13, 2018 | 08:26 AM

#21

tony m 6.7

Elder User

Joined: Jun 2017

Posts: 685

Likes: 4

It's quieter due to a number of reasons, high pressure common rail injection for one, graphite cast iron block, ( I believe that's right ), closer tolerances, advancements in metal technology, etc, etc. My 6.7 is so quiet that on warm days all you hear at idle is the cooling fan. People can't believe it's a diesel. When I picked up my 2012, my wife asked " are you sure this is a diesel?" She's used to it now between my '12 and my '17. Do I miss some of the noise? Probably wish there was just a bit more turbo whistle. That sound is so cool when you're spooling it up and letting it stretch it's legs. And forgot to mention, easier starts due to improved glow plug technology along with injection improvements.

Sep 13, 2018 | 08:57 AM

#22

Clubwagon

Cargo Master

Joined: Dec 2003

Posts: 2,182

Likes: 7

From: Saint Augustine, FL

Quote:

Originally Posted by wfedwar

^^^ This. While there are lots of small improvements in NVH the biggest reduction is noise comes from Pilot Injection. Most of the noise in diesel engines comes from the ignition process. If you know what 'pre-ignition' (detonation) sounds like in a gasoline engine, that's the same noise you hear in a diesel. The difference is that's what's supposed to happen in a diesel.

Pilot injection reduces the ignition noise that takes place in the older diesels. Thus the engines are a LOT quieter. Add to that the DPF in the exhaust, and the other NVH improvements and you have a very quiet diesel.

I love how quiet my '17 is, as does my wife. I traded an F350 6.0 on my '17 6.7. I loved the 6.0 is was an excellent engine (with the required fixes) and far quieter than my old 2001 7.3 PSD SuperDuty E350 Clubwagon. The '17 6.7 quickly became my wife's favorite vehicle. She always hated the clatter and odor of my two previous diesels. That the '17 is quiet and basically odorless makes her very happy. I never liked the noise and smell either but it was a big issue for her.