I have an old thread called Oil Spots on an Air
Filter that is in the process of being deleted "
Error! newsgroup server responded: Bad article
number," so I'll take over here.
I have used the adjustment screw on the rear of
the IP to reduce the exhaust smoke from the 240D.
The reduction was considerable but it is still
smoky. There is no blue color - it's now grey.
The question is just how clear should the smoke
be? Subjective question I know but efforts will be
Once my 300D turbodiesel is warmed up the exhaust is perfectly clear.
If I am following my car and the driver floors it there is a light
hint of smoke at low speeds, but over 15 or 20 the car is moving along
enough that you can't even detect it. And it is set pretty rich too.
You really shouldn't be able to detect any smoke either while it is
warm and idling or while driving.
The engine in my 1982 300 TDT was remanufactured last summer. I had
the shop put in new cylinder sleeves and use standard pistons, so my
compression is like new. I do not see any visible exhaust except on
very cold mornings for just a few moments as the engine is warming up.
I agree with Tiger. If you see a lot of smoke the compression of the
engine may be suspect.
My car has only 90,300 miles on it and the oil has
been changed very regularly.
I think the MBZs of that era should drive fiurther
than that before getting new sleeves.
Will run it hot for a while and then check again.
I had my run and got the engine normal operating
temperature but there was no great change in the
Now I am thinking of 3 tasks that could help it.
1 Do the purge on the IP and injectors.
DieselGiant has an article on this and it seems
like they used a soft drink plastic bottle to hold
the purging fluid, with two holes in the cap, two
short hoses, one to the IP inline filter and the
other to the top of the spin filter. The IP sucks
the fluid out, some of which burns as the engine
runs and the rest returns to the bottle.
is for an OM617 but the pictures look like my 616.
2 Adjust the valves. This looks straightforward.
3 Adjust the timing chain. Info on this one seems
to be lacking. The MBZ manual, and DieselGiant
describe the replacement of the chain but I can't
find any instructions for adjusting the tension.
Is it simply a matter of adjusting the tension
bolt until the noise is a minimum or is there
I would definitely suggest #1. The purge gave my car a lot of power.
If it is dirty in there all sorts of bad stuff can go on. Use two cans
of the lubromoly when you do it. I heard a few months ago that the
lubromoly was available at advane so I checked, btu they didn't have
any at my local advance. They did swear by seafoam though. The manager
there has an old diesel tuck and he said it really improves the
performance when he puts it in. I bought two cans but haven't done it
yet. It doesn't say on teh can that you can run it through the engine
straight like the lubromoly, but then again I don't think it says that
on the lubromoly either. Just food for thought.
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