I know this sounds dumb but.whats with that plastic valve cover and what does your oil cap screw into.yeahI forgot,its on an 2006

 

Metal valve cover... It's just a vanity cover...

 

oil seprator for crankcase vent.

 

Madhat. Does that cover really suppress sound of the motor, or did you not notice anything? I have heard of some guys taken them off and saying it was louder?

 

I remember my 2006 having a one piece plastic rocker cover.

 

I doubt it. I dang half deaf anyhow... one too many 81 mike mikes danger close...

 

madhat: Thanks for posting the picture. I was also wondering what was under there (I had been told it was a sound dampening device).

 

I thought there were 25 little people with stone hammers bustin' cans under there!!!

 

I was under the impression that the plastic valve cover on the 2006's WAS/IS the valve cover??? I did not know that there was a metal cover under it. The cover on mine looks very different than that found on a 2005 or earlier model.

CD

 

2006 are different I think.

 

svtrick, only dumb question is one not axed. So under there ye have your valve springs ,4 per each hole of course, rocker arms, injector sticks, tubes that attach to them, top of pushrods. Oil hanging around in puddles. The oil filler cap just screws into the valve cover and that's it. Just a place to pour in your Oil of choice. Anyhoo, that is mainly what is under there. Up until these things got so quiet, If it didn't sound like it was about to fly all to pieces, something must be wrong with it. I have an 06, my very first Cummins, it happened to come with a Dodge wrapped around it, however, I have no fault with the wrapping so far. Went to Cummins shop other day and bought the high idle wire and enabled it, now on cold mornings, I can crank it, hit cruise control, and accelerate it up to 1500 rpm to waarm it up sooner and more importantly, prevent wet stacking, very cool. You should do it to yours if you have not already. I think if it is an automatic, you just go to dealer and sweet talk them into doing it either free or pretty cheap I think.

Oh yea, your head bolts or studs if you use them are under there (most of them anyway)

 

On the 06-07 the plastic that you see IS the actual valve cover. on 03-05 the plastic piece is just a beauty cover (like the Madhats pic)

 

And you don't want to know how much that thing cost.....

 

2006 VC for comparison...no clue what it looks like off though.