Re: 3.9 sludge and knock.

From: steveophonic@yahoo.com
Date: Wed Oct 25 2006 - 20:54:09 EDT


Thank you for the reply and for the useful information! :)
Steve P.

In article <453BDB84.5010807@aol.com>, SilverEightynine@aol.com (Terrible Tom)
writes:
>
>
> steveophonic@yahoo.com wrote:
> > Hey! I haven`t posted anything for a while,and I just now joined the
web-news
> > thang!
>
> Welcome back!
>
>
> > Anyway,it has 20,000 miles on it,and the oil didn`t look like it had ever
been
> > changed. The last 1/2" of the dipstick looks like black plastic (is it??)
and
> > it doesn`t want to come off of there.
>
> Thats a hardend tip to help the dipstick snake through the tube and into
> the oil pan, don't worry about it.
>
> > Other places on the stick looked like
> > baked-on oil,so I cleaned it off with an SOS pad,and changed the oil with
> > Mobil 1.
>
> sounds like it hasn't had regular oil changes. The 238(3.9), 318(5.2),
> and 360(5.9) engines are not known to be sludge motors, unlike other
> engines (the 2.7 V6 in the Intrepid is a sludge prone engine) I would
> recommend running a full can of sea foam in the crank case just prior to
> your next oil change. Also - as per my own recent oil filter
> experiance, I would suggest you change the oil filter halfway through
> your oil service interval. (if you are going to run 4000 miles, change
> the filter at 2000) - as it seems an engine with a little sludge build
> up can cause an oil filter to clog up quickly. Had that happen to one
> of mine after only a few hours at idle!
>
> > The motor runs okay I guess (some of you may remember my experiences
> > with my 99 V6 Dak from years back. This one isn`t much better,but it does
okay
> > with the AC off).
>
> Stock 3.9s were never powerhouse engines in stock form... be glad you
> don't have a premagger 3.9 :-P
>
>
> > The other thing is a knock from the motor when fully warm,idling in gear.
It`s
> > kinda loud,actually. Sounds almost like my old 2.2 Lebaron with the wrist
pin
> > knock,but not as loud. I can`t hear it unless it`s in gear. Give it some
RPM
> > and it seems to go away.
>
> This might be related to the dirty oil. If the lifters are dirty and
> clogged - they won't "pump up" as well - and can cause clacking that
> will vary with engine speed. Again, a can of sea foam will clean out
> sludge and should free up sticking lifters. Marvel Mystery Oil also has
> the same uses.
>
>
>
> --
> -------------------------------------------------------------
> "The word, is no. I am therefore going anyway." - James T. Kirk
>
> 75 Honda CL360, 89 Dakota, 89 Dakota 4x4,
> 95 Dakota 4x4, 96 Neon, 01 Ram 4x4
> http://members.aol.com/silvereightynine/
> AIM & Yahoo: SilverEightynine
>



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