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#1
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What can cause extreme smoking?
Hello. I am new to mercedes and diesels, but am looking at getting a 70s or 80s MB diesel. I have found a early 70s 220D that is quite inexpensive, but the owner reports that it smokes enough to make him reluctant to drive it. I know my way around gas engines, and know that this is a bad sign for a gasser, but what can it mean for a diesel? Should I look into it more or is it not worth while? Thanks for you advice.
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#2
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How long has it sat?
Both of my diesels sat for around two years... smoked like an old smoke stack until I drove them about.
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I'm not a doctor, but I'll have a look. '85 300SD 245k '87 300SDL 251k '90 300SEL 326k Six others from BMW, GM, and Ford. Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG] |
#3
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Lots of things can cause diesels to smoke. Way to many to list here. I recommend doing a good diesel purge and changing the filters, then drive the car pretty hard for a while. I am inclined to say that you may have a fair amount of smoke reduction. Fresh fuel is also a good helper.
Report back after you have put some miles on the car.
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1981 300D 147k 1998 VW Jetta Tdi 320k 2001 Dodge Ram 2500 141k 1979 300D 234k (sold) 1984 300D "Astor" 262k(sold) Mercedes How-To and Repair Pictorials I love the smell of diesel smoke in my hair |
#4
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220 D
Yes.... i agree ....it very well may have cloged injectors from sitting.
Run it out of fuel .... Fill up with a fresh batch.... then change the filters an do a purge.. It worked wonders on my 350sd
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2003 SLK 230 (85000) 1999 E300 Turbo Diesel (388,000) 1991 350SD Turbo Diesel (185,000) |
#5
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Lots of things, you need more info. Just sitting for awhile will cause a diesel to smoke a lot.
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1999 SL500 1969 280SE 2023 Ram 1500 2007 Tiara 3200 |
#6
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Diesel smoking can also be caused by injector pump timing, its just like ignition timing in a gasser.
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#7
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If you are interested but undecided how about a compression and leakdown test prior to purchase. If engine has pretty good compression take a chance. But if compression is down in the mud it is another matter. Smoking also could be caused by a badly restricted air cleaner or many other things. Sometimes expensive to stop and sometimes very minor. Have not heard of diesel fuel going bad other than fungus growth but have heard and know of bad fuel being sold from time to time. If it starts right up in pretty cool temperatures it's a good sign as well. One check you can make is there is a vent line from the vaccum pump to the manifold that may terminate at the air cleaner. Leakage of the diaphram in the vaccum pump will put base oil up that line into the intake. Check it for oil. Others will have ideals wait and see prior to making a decision.
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#8
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Thanks for all of the responses. I will see if I can extract some more information from the owner. How does one go about checking the compression on a diesel, and how high should it be? (Sorry, by diesel newbie-ness is showing again.)
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#9
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What color is the smoke? Black smoke might be worth trying to correct. Blue smoke is something you should run and not walk away from.
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#10
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Quote:
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1977 300d 70k--sold 08 1985 300TD 185k+ 1984 307d 126k--sold 8/03 1985 409d 65k--sold 06 1984 300SD 315k--daughter's car 1979 300SD 122k--sold 2/11 1999 Fuso FG Expedition Camper 1993 GMC Sierra 6.5 TD 4x4 1982 Bluebird Wanderlodge CAT 3208--Sold 2/13 |
#11
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Quote:
Is this the car? Doesn't look to bad from the outside at least. The price makes it worth maybe just taking a chance on it and rolling it again if you don't like it.
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'84 190d 2.2 - Silver Converted to 5-Speed '84 190d 2.2 - Blue Factory 5-Speed '76 300D (W115) Sold, found again in less auspicious circumstances |
#12
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you will need
a diesel compression guage. and an adaptor for mb. tested cold the min is around 220 normal cold is from 300 to 330 or so at sea level. less as you go up in altitude. tested warm the values are higher. you hope for compression that is close to equal, withing 10% is considered good. below 220 you will have starting problems especially in cold weather. once started diesles tend to run fine even with a lot of wear... just dont shut it off.
my first diesel was a 220, 1972. sweet little car. good luck tom w
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC] ..I also have a 427 Cobra replica with an aluminum chassis. |
#13
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Yep, that was the one. I got in touch with the owner and it had sold. Oh well.
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