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Mercedes Benz 190D 1985 (W201)
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Discussion Starter · #1 ·
Hi folks!
I drive a Mercedes 190D 2.2 1985.
I am having one little problem, when I accelerate at full throttle or so I can see (just during the night and when a car lights are behind me) some smoke comming from my pipe, it's just at the moment when I accelerate hard. I have read some post over the web and I think it might be the headgasket!!? I don't know if it may be possible, I bought the car like 5 months ago and I don't know how long ago it was serviced. I am planning to replace fuel (diesel) filers, oil filter, oil, and air filter (right now air filter seems to be clean). Just during a cold start just in the morning I can see the white smoke. I don't know if you guys can help me to figure out what could it be wrong with my Baby Benz?
Oh.. by the way, there's NO oil in the coolant and I doubt there is presence of water on the oil.
Thanks :)
 

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'87--190E 2.3-16v(being rebuilt), '99--C230 Kompressor
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3,488 Posts
head gasket....my 84 started this...i promptly stopped driving it, never know when it will go
 

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96 E-320, 91 190E, various and sundry Euro and American vehicles
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12,141 Posts
Agree on the (possible) head gasket.
Also, being from California, is there coolant in there besides just plain water?
Keep check on coolant level.

aardvark
 

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190D
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344 Posts
White diesel smoke usually means incomplete or unburnt fuel

either too much or not enough fuel

Check your air / fuel filters
If you have more than 150K on the injectors, think about a new set of injectors

Form your description, the problem has NOTHING to do with head gasket.
 

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1984, 201.122, OM601.921, G717.410
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504 Posts
"Smoke" at night, seen only in the rearview mirror, is quite ambiguous.

Rich diesel mixture produces black smoke.
Lean diesel mixture produces less of everything.
Raw diesel, heated but unburnt, can produce white-ish smoke.
Water based coolant produces white steam.
Lubricant with additives used to produce blue-ish smoke, but perhaps not now with new EPA standards.

If there is a head gasket leak, the much higher cylinder pressure at TDC will typically force air/fuel mixture into coolant. Coolant would leak into cylinder during intake stroke and produce steam all the time, not just when accelerating. Also check for VERY low compression, VERY low fuel injection, or bad injection timing -- which prevents combustion and exhausts unburned diesel from one cylinder.
 

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190D
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344 Posts
BTW: At night, almost any type of smoke would appear white in the rear view mirror when lit by other car headlights

Need to see it at day time.

But generally, full-throttle diesel smoke is a fuel related problem.
 

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Mercedes Benz 190D 1985 (W201)
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90 Posts
Discussion Starter · #7 ·
Hi. Thanks for your help. I will try them to replace the injectors sinde I don't know when did the last owner replace them? The car is 200k miles so it might be the problem. Do you know by a chance how to replace those injectors? Can I do it by my self or I need a specialist to make it?
Thanks.
 

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'98 E300, '10 GL350 Bluetec
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1,267 Posts
This smoke is most likely unburnt fuel, a result of acceleration. You mentioned that it only happens just at the moment that you accelerate hard. You can only see it at night, because there is a light behind you illuminating the smoke.

This is just one of the quirks of a diesel engine, and I would not worry about it one bit. However, at 200k miles, I certainly would have the injectors rebuilt; consider new Bosio or Monark nozzles and you will see an improvement in engine performance.
 

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Mercedes Benz 190D 1985 (W201)
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90 Posts
Discussion Starter · #9 ·
You are right, I can only see the smoke coming from my exhaust only at night and when a car behind iluminates and yeah, it's just when hard accelerate. I will consider on replacing those injetors and nozzles, those ones you mentioned where and for how much can I find them? Is it hard to replace them? Glow plugs have nothing to do for that problem right?
Regards.
 

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'98 E300, '10 GL350 Bluetec
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1,267 Posts
Glow plugs either work or don't, and when they don't you will have a hard-starting problem.

For the injector rebuilds with Monark nozzles, google for "c. sean watts".
 

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'98 E300, '10 GL350 Bluetec
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I sent my injectors to him; he rebuilt them and installed the new nozzles. He replaced only the springs that were necessary, pop tested them and sent them back with new heat shields. Great, friendly, fast service at a very reasonable price.
 

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Mercedes Benz 190D 1985 (W201)
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Discussion Starter · #13 ·
I sent my injectors to him; he rebuilt them and installed the new nozzles. He replaced only the springs that were necessary, pop tested them and sent them back with new heat shields. Great, friendly, fast service at a very reasonable price.
Like how much is it a reasonable price to pay for injector rebuild? How much are them new? I can't stop my car for more than 2 days since i have to go to school, that's why my question.
 

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'98 E300, '10 GL350 Bluetec
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1,267 Posts
$40 inc the nozzles, all parts and labour. If time is an issue, buy the nozzles and have a local diesel shop take care of the rebuild.
 

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Mercedes Benz 190D 1985 (W201)
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90 Posts
Discussion Starter · #15 ·
HI.
Today I was checking out all the vacuum hoses on my 190D car today and just noticed that one little hose that comes from the EGR valve to the EGR regulator? (vacuum line) Has a screw in the line (blocking). You guys know why could it be there? I mean it has been there since I bought the car.. and there has to be a reason why a "big minded guy" decided to do it...

Any ideas? Should I try to reconnect as it should go and get that screw out of the way?

Thx guys.
 
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