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#1
02-14-2007, 07:13 PM
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WHITE SMOKE everywhere!
so, i'm finally going to be able to spend some time workin' on my new '85 300TD.
firstly, i'd like to solve whatever's causing all the white smoke to billow out of the exhaust. it happens most whenever she's started and/or cold, obviously increasing with accelerator pressure. and, man, she sounds a little sick...loud clack clack clack. i'm guessing since the smoke's white, it means it's fuel? (also, since she doesn't seem to be burning ANY oil)... would you guess it's a valve issue, or would it most likely have something to do with timing and/or fuel delivery? would love some input.
__________________
-lee '83 300CDT (286k) former proud owner of: '85 mercedes euro 300TD '80 mercedes 300TD '77 mercedes 280e '80 mercedes euro 250 '82 mercedes euro 250 
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#2
02-14-2007, 07:23 PM
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Its a fuel issue, a glow plug issue, or a lack of compression issue.
On very cold starts I let my car glow three times.
__________________
green 85 300SD 200K miles "Das Schlepper Frog" With a OM603 TBO360 turbo ( To be intercooled someday  )(  Kalifornistani emissons  )white 79 300SD 200K'ish miles "Farfegnugen" (RIP - cracked crank) desert storm primer 63 T-bird "The Undead" (long term hibernation) http://ecomodder.com/forum/fe-graphs/sig692a.png
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#4
02-14-2007, 09:50 PM
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feature
The white smoke is a feature, when some one is tailgating you, floor it, they will back off!
__________________
Mercury is a boxer 1984 300d 1999 Prelude Medici road bike Klein touring bike Klein mtn bike
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#5
02-14-2007, 10:31 PM
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Are you sure this is not a headgasket issue, does the white some smell like fuel or sweet, Anytime i have had an excess fuel issue it has been black smoke.
__________________
1984 Euro 300SDC, (4spd standard) 1986 Toyota Landcruiser Diesel HJ60 5spd X2 Gone but not forgotten (some sold, some stripped) 1983 300 SD, 1985 300 SD, 1983 240D, 1986 300 SDL, 1985 300 SDL, 1983 300 D, 1984 300 D, 1985 300SD, 1987 300 SDL, 1983 300 SD, 1985 300 TD Euro, 1983 380SEC, 1990 300 D, 1987 300D, 1982 300D, 1982 300D, 1994 E420, 1987 300 TD, 1987 300 D, 1984 300 D
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#6
02-14-2007, 10:45 PM
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White smoke is generally steam-related. Steam is generally water related. If it's coming out your exhaust in large amounts...well we'll let you put 2 and 2 together...and it won't be cheap.
__________________
1989 300E 144K
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#7
02-14-2007, 11:48 PM
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I'm sorry man, but I think you blew a head gasket!
 How do your radiator hoses look when the motor is running? Black smoke and soot would be an overly rich condition. White smoke is burning oil or coolant This won't be cheap!
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#8
02-15-2007, 02:47 AM
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The link...
See this thread in particular...
is it normal to see lots of condensation smoke from the exhaust?
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#9
02-15-2007, 11:29 AM
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Steam dissipates quickly, smoke lingers.
White smoke on startup is usually unburned fuel, as others have said if it continues once the engine is running smoothly it might be a problem (timing, IP/nozzle balance). My cars smoke white when started cold on a cold day, typical, if it sits and idles rough it will continue to smoke for a couple of minutes, if I put it in gear and drive away the smoke quits immediately (engine under load) and doesn't come back.
__________________
 Gone to the dark side - Jeff
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#10
02-15-2007, 01:18 PM
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Well, though i am an idiot, i'm not a complete idiot. Like JimmyL said, if it was steam, i woulda said steam.
 This is definitely white smoke, and it happens whether the outside temp is cold or relatively warm. No coolant or oil diminishment. Even leaves a slick, gassy residue on the rear of the car after driving for awhile.All the injectors were replaced by the previous owner right before i bought it, in an attempt to solve the problem....i can see they're new (though they say "reman" on them), so i'm guessing they're not the problem? I've got a pretty rough idle, and that LOUD clack clack clack, but accelerates pretty quickly, smoking the entire street when engine's cold, but then not visible after warm-up (though still present, i believe, due to said residue on rear of car). What next? try a can of diesel purge? compression test? valves? timing? what say y'all?
__________________
-lee '83 300CDT (286k) former proud owner of: '85 mercedes euro 300TD '80 mercedes 300TD '77 mercedes 280e '80 mercedes euro 250 '82 mercedes euro 250
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#11
02-15-2007, 01:45 PM
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Quote:
__________________
1989 300E 144K
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#12
02-15-2007, 02:38 PM
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Quote:
It's probably a good idea just to pull that damn glow plugs and power them up indidvdually to see it they actually glow red. If you have an ammeter that will tell you whats going on without removing.
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#13
02-15-2007, 08:56 PM
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just replaced all the glow plugs last week. will do the valves in the next day or two, and hope for the best! i'll post results, and future consult if symptoms continue.
__________________
-lee '83 300CDT (286k) former proud owner of: '85 mercedes euro 300TD '80 mercedes 300TD '77 mercedes 280e '80 mercedes euro 250 '82 mercedes euro 250
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#14
02-15-2007, 10:18 PM
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Once upon a time when I was driving my Mother's relatively new, just out of warranty 1971 220D in Vermont with some buddies for a weekend of whatever away from school, I stopped on I-91 to pick up a pair of hitchhikers and, poof! They disappeared as I pulled up in a thick cloud of white smoke. Like the stuff a movie set might make to mimic thick fog. I shut the engine off and checked the oil level, which was ok, but lower than I would have expected. I fired it back up and the smoke screen reappeared. I got genuinely concerned, and decided to drive a few miles to the next exit and stop at a truck stop and buy some engine oil. A case.
I checked oil consumption every ten miles for a while and I noticed once I was under load the smoke became less offensive. If I was idling it was really nasty. At highway speeds it was hardly noticeable. I called the nearest MB dealer, in Woodstock, Vermont at the time, and made arrangements to drop the car off on my way back to college. I was expecting a horrible report, and it turned out to be massive engine oil consumption passing through the vacuum pump diaphragm. In that vehicle at idle there is something in the throttle system on the intake side to regulate air flow, and it lowered the manifold pressure enough to just suck oil out the vacuum pump discharge line which exits to the intake manifold. Cost at the time was about $65 to fix it. Took about an hour or so. So, the point is unburned engine oil looks like thick white smoke too. And there may be a few paths for the oil to get into the intake manifold. Like a blown seal on the turbo. Good luck and I hope this helps. Jim
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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)
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#15
06-13-2011, 01:29 PM
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White Smoke?
Since the OP said "when the car is cold" I second or third the opinion that it is condensation in the exhaust system, which can be normal, or a sign of getting old and starting to wear (which is also normal as any car gets older). But, for future reference:
White Smoke = steam Grey smoke = burning oil Blue/Black Smoke = unburned fuel Hope that helps.
__________________
1983 300D, the "Avocado" 1976 240D, 4-spd the "Pumpkin", SOLD to Pierre 1984 190D, 2.2L, 5-spd, my intro to MBZ diesels, crashed into in 2002
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