I have a 1978 300D. It seems to be smoking all the time. I found that one of the glow plugs were bad. Would this be why it is smoking?

Thanks for your help,

__________________
Shea

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NO!

After engine is running GPs are shut off and have no effect on the engine or exhaust smoke.

What color is the smoke?

P E H

Black

__________________
Shea

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Try to put some diesel additives like Redline 85 or Diesel Purge in your fuel tank. It may help to eliminate those black smoke.




David

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1985 300D

I was thinking about trying some. The only thing I have found is some stuff made by Pyroil. Is this stuff good? Do you know a retail store that is saleing Redline? I know you can buy it on Fastline but I don't want a whole case of the stuff.

Thanks for your help,

__________________
Shea

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PepBoys sells RedLine Diesel Fuel Catalyst. I have not found it at any other chain stores around me, but some specialty, high performance supply stores sell the full line of RedLine stuff. I think you can find a local supplier by going to the RedLine website (www.redlineoil.com).

Black smoke is generally a sign of unburned fuel, due to poor combustion. The most likely causes of poor combustion are poor injector spray pattern, injection timing off, poor fuel quality, air intake restriction (like a clogged air filter) or low compression. There are bunch of reasons for most of these issues. RedLine will help solve some of them, but it will not address real, mechanical issues. I use it regularly, and it should make some difference. But if you have a really nasty case of smoking, you may have to address the mechanical items to get the machine running as it should. Good luck, Jim

__________________
Own:
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

Owned:
1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)

hi!

check in following order..

air filter.

check the camshaft if nock number 2 is damaged. (very often bad).

valve clearance.

check inj. pump timing.

compression test. at least 20bar with differences MAXIMUM 20% between lowest and highest.

repair the injectors, if u are going to add anything to the fuel ADD 2 STROKE OIL!! fully synthetic.

maybe u have to change the injector if it is old and very bad
DNOSD 265 will fit and work very well on your car, need to be set to 115bar-120bar(new inj. 120bar).

hope i helped u on your way!

Oh sorry!!

i forgot to tell u..

its a converted 280SE,
engine and Aut.gearbox taken from -88 w124 300D.

it has NO turbo..


OM 603.912

one pic on it

Attached Thumbnails