Actually, my catalytic convertor (actually the heat shield) makes a
clattering sound right around 2800-3000 rpm. I guess it has to do with
harmonics. Mine's the 3.9 though.
-Chris
----- Original Message -----
From: "Stlaurent Mr Steven" <STLAURENTS@MCTSSA.USMC.MIL>
To: <dakota-truck@buffnet.net>
Sent: Monday, October 15, 2001 3:07 PM
Subject: RE: DML: RE: 00 dak 4.7 engine problem
> I would say it was the catalytic converter but usually you should hear it
> when idle. If it was internal in the engine, you should also hear it when
> idling.
>
> You did not change out the pipes for headers?
>
> I would have the dealer take a look at the vehicle.
>
>
> --------------------------------------
> Steven St.Laurent
> IOW/IOS Engineer (NT Platform)
> C4i Engineering Branch, PSD, MCTSSA
> MARCORSYSCOM, US Marine Corps
> Office (760) 725-2506 (DSN Prefix: 365)
> "My work has already proven itself. It is
> you that has not gotten it yet....unknown author"
>
> -----Original Message-----
> From: Mike St. John [mailto:mike.stjohn@rcmt.com]
> Sent: Monday, October 15, 2001 12:31 PM
> To: dakota-truck@buffnet.net
> Subject: Re: DML: RE: 00 dak 4.7 engine problem
>
> Stlaurent Mr Steven wrote:
>
> >What about when idle?
> >
> >
> >
> >--------------------------------------
> >Steven St.Laurent
> >IOW/IOS Engineer (NT Platform)
> >C4i Engineering Branch, PSD, MCTSSA
> >MARCORSYSCOM, US Marine Corps
> >Office (760) 725-2506 (DSN Prefix: 365)
> >"My work has already proven itself. It is
> >you that has not gotten it yet....unknown author"
> >
> >-----Original Message-----
> >From: Mike St. John [mailto:mike.stjohn@rcmt.com]
> >Sent: Monday, October 15, 2001 11:42 AM
> >To: dakota-truck@buffnet.net
> >Subject: Re: DML: RE: 00 dak 4.7 engine problem
> >
> >Stlaurent Mr Steven wrote:
> >
> >>Is it a knocking sound under full throttle?
> >>
> >>--------------------------------------
> >>Steven St.Laurent
> >>IOW/IOS Engineer (NT Platform)
> >>C4i Engineering Branch, PSD, MCTSSA
> >>MARCORSYSCOM, US Marine Corps
> >>Office (760) 725-2506 (DSN Prefix: 365)
> >>"My work has already proven itself. It is
> >>you that has not gotten it yet....unknown author"
> >>
> >>-----Original Message-----
> >>From: Mike St. John [mailto:mike.stjohn@rcmt.com]
> >>Sent: Monday, October 15, 2001 10:47 AM
> >>To: dakota-truck@buffnet.net
> >>Subject: DML: 00 dak 4.7 engine problem
> >>
> >>I have a 00 dak quad cab, 25,000 miles.... sometimes under a load -
> >>going up hills etc... the engine rattles, kinda like the rockers ,
> >>however oil have been change every 3,500 , mobil 1 is my oil of choice.
> >> anyone else experience this prob
> >>lem or have any insight into it.
> >>
> >>
> >>Thanks
> >>
> >>msj
> >>
> >
> >
> >no, never @ full throttle, mostly during acceleration 1/2 throttle or
> >so, and its more like a clacking noise than a knock..., dealer said it
> >may be the catalytic, but the dealer also installed a new power steering
> >pump and only put 1 bolt in it. so i'm still looking for answers.
> >
> >thanks.
> >
> no noise @ idle, not even a tick. only happens when under somewhat
> under a load, oil press is fine...other than the clacking the truck
> drives great, acceleration very nice, shift points seem to be off a bit
> , but i'll work on that after I find out what the clacking is.
>
> thanks
> msj
>
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