how to prevent your 6.7 from making the "diesel rattle" noise???

[morepower02]

Cool. I guess I'll need to start whacking it over diesel power mag....

 

[ChattyCathy]

Cool. I guess I'll need to start whacking it over diesel power mag....

How often do you whack it?

 

[morepower02]

My subscription ran out in 2010.

 

[ChattyCathy]

My subscription ran out in 2010.

You can find it for free on the internet.

 

[morepower02]

My 15 duramax started to make a sound today that might sound like a diesel. Not sure as the exhaust makes no sound but under load it rattles a little. It's predecessor the 7.3 and 6.0 were so quiet not sure what to do.

 

[dsmracing1]

Try a Cetane booster. I use Amsoil Cetane booster and add it to my Howe's fuel conditioner. Before I didn't use a Cetane booster and I got a lot of extra racket. Purrs like a kitten now....

 

[jcain]

Amsoil cetane didn't do **** for my truck, but their injector cleaner + cold flow did wonders. So now I just use Ford pm22 during the warmer weather.

 

[TyCorr]

Additives...lol...

Noise...lol

Whackin it is the only true, given thing in this thread.

 

[knaffie]

Try a Cetane booster. I use Amsoil Cetane booster and add it to my Howe's fuel conditioner. Before I didn't use a Cetane booster and I got a lot of extra racket. Purrs like a kitten now....

I have. It seems to help some, but definitely doesn't keep it away 100%.

 

[CWAY6.7]

Yank the 6.7 and swap in a prius motor.

You already know!!! Lol

Cetane Booster helps a bit I agree. Now, the tick after oil changes.....RevX all day cap'n

 

[TyCorr]

6.7s are loud? I parked next to one at a gas ststion once and couldnt hear it over the sloppy hpfp in my duramax.

 

[knaffie]

Very quiet at idle. Not so quiet under load. Sometimes.........

 

[CATDiezel]

The OP has never owned a 7.3L


The trucks do gradually get louder from new. As the engine breaks in alittle noise becomes more present. You may also be hearing a passive regen. It's a small regen not noted on the dash.

The noise is directly related to injection timing. It's just the nature of the beast.

 

[knaffie]

I haven't owned a 7.3, but rode in plenty of them. What does that have to do with anything?

Its not passive regen causing the noise.

If injection timing is it, then that just sucks.

 

[morefuel]

I was always under the impression that a 6.7 was diesel. Could that have something to do with the noise?

 

[Dzchey21]

The root cause is actually in the EGR cycling is your truck deleted? Whos tuning?

 

[knaffie]

Stock

 

[Dzchey21]

i would bet 100 bucks its the EGR,

If you have someone that has a good scan tool that can monitor EGR duty cycle see if the noise follows the EGR cycle. ALso a good way to check is to command 30% EGR duty cycle and see if the noise sounds about the same.