Hey guys,

So our 220 has had a knock for awhile, when it idles it varies in volume like tah tah tah tah TAH TAH TAH tah tah TAH TAH tah tah tah kinda loud and metallic sounding... The only reason I decided to really look into it is because we just had the injectors replaced, got the car back yesterday hoping it would fix our smoking issue because she threw out lots of smoke.

Well we got her back and the knocking almost seems a bit louder to me, and she still throws out lots of smoke as well, some white smoke I saw with lots of black. I was thinking of doing a diesel purge but is that even necessary since the injectors are new? I've looked a lot more into the issue and all i'm really seeing that knocking is mean impending doom

Have I come to the crossroads of this doom???

__________________
2007 BMW 328XI

Have you done a compression test ?
Are you sure the valves are properly set ?
Does it do more smoke upon start up than later when it is warmed up ?

__________________
1980 240d ,

chain elongation, cam marks reference:
http://www.peachparts.com/shopforum/diesel-discussion/10414-help-i-need-check-stretch.html

http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html

evap fin cleaning:

http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator

A/C thread

http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html

I haven't done a compression test or know if the valves are set correctly, on the smoking issue, I would say warmed up, I mean she throws out some smoke on the initial start up but when building up speed to go to second and third/fourth gear there is a good amount of smoke, to where people move to the next lane constantly when behind me. On the freeway, if I step on it to go faster I see it in the rear view mirror and when I let off the accelerator I get a cloud of smoke.

__________________
2007 BMW 328XI

Are you using a lot of oil... or does this appear to be unburned fuel making the smoke?
You need to check your chain elongation...
then set your IP ...
did you pull the precombustion chambers and be sure the little holes are clean...and the pintle ball is there... ?

__________________
1980 240d ,

chain elongation, cam marks reference:
http://www.peachparts.com/shopforum/showthread.php?threadid=10414

http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html

evap fin cleaning:

http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator

A/C thread

http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html

I want to say we would add a quart every 2-3 weeks if we were driving her all the time, possibly unburned fuel not too sure.

I'll check the chain and see if there is any play, should it be super tight? How would I set the IP? I hate to admit that I'm not to familiar in this area of the engine, mostly just the front belts and whatnot.

__________________
2007 BMW 328XI

1st things 1st.
SET YOUR VALVES.

__________________
1985 300D 198K sold
1982 300D 202K
1989 300E 125K
1992 940T

"If you dont have time to do it safely, you dont have time to do it"

"The democracy will cease to exist when you take away from those who are willing to work and give to those who would not."

Will do!

__________________
2007 BMW 328XI

Check your alternator tensioner bolt to see if it broken. Some of the early w115s had a curved, long tensioner bolt which has a tendency to crack near the bend. I am talking about the type shown here:
New Original Mercedes Alternator Belt Adjust Adjuster Tensioner Bolt Support Kit | eBay
Anyway, mine is cracked and makes a metallic tapping sound as a consequence. This obviously wouldn't solve all your problems, but it is worth glancing at.

__________________
1968 220D, w115, /8, OM615, Automatic transmission.
My 1987 300TD wagon was sold and my 2003 W210 E320 wagon was totaled (sheds tear).

If someone has not mentiond this if it has a Pneumatic Governor if there is a leak in the Governor Diaphragm or the Housing where the shaft the Vacuum Leak causes excess Fuel.

Also if the Governor Diaphragm is not leaking it can just plain be stiff.

There is several threads on testing and replacing.

Governor Diaphragm Test
74 240d Grey smoke questions

What are the symptoms of a bad IP Governor Diaphragm? Has Symptoms, Cost of Diaphragm, description of how governor works.
http://www.peachparts.com/shopforum/vintage-mercedes/223548-what-symptoms-bad-ip-governor-diaphragm.html

Governor Diaphragm
What are the symptoms of a bad IP Governor Diaphragm - PeachParts Mercedes ShopForum

__________________
84 300D, 82 Volvo 244Gl Diesel

What does the Exhaust smell like. Fuel or Oil burning?

I would consider that a lot of Oil being replaced if you are not on the Freway for like a 100 miles a Day.

__________________
84 300D, 82 Volvo 244Gl Diesel