Starting Problems - Mercedes-Benz Forum

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post #1 of 6 (permalink) Old 09-15-2008, 09:56 AM Thread Starter
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Date registered: Sep 2008
Vehicle: 1973 Mercedes 220D, 1964 Sunbeam Alpine
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Starting Problems

I just purchased my first Mercedes, 1973 220D. Yes a real power house.
I am unsure how many miles are on the engine as the OD/Tip is not working. Is this a common problem with this design?

I had been able to start her but still needed to use the glow plugs even in hot weather. It may be that she need an engine rebuild but I thought a fuel filter would be a good start. She was good for a couple of days but now she will not start at all. She was great on the hwy and traveled up to 80mph without any problem, very fun to drive around.

Can anyone tell me what is the best path to take. I don't mind doing an engine rebuild as the body and structure of the car is in great shape.

So am I best to do a complete engine tune up and see if thing are better? I have changed the fuel filter and purchased a new battery just to see if it would help. I have run a little diesel/fuel injector cleaner through her and it seemd to help a little. Should I look at injectors, drain the fuel tank????

Can a leak-down and compression test be done on the engine?
What books can I purchase for the correct specs so that I can check these things and possibly check valves etc.

I am new to Mercedes / Diesels but would love to learn.

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post #2 of 6 (permalink) Old 04-01-2009, 08:04 AM
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I had the same problems with my 69 220d, I changed the filters, the glow plugs and battery. I had problems getting it started, it sat in a garage since 86'. I got it almost to start everytime now, just start with the basics, maybe you'll luck out.
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post #3 of 6 (permalink) Old 05-16-2009, 08:13 AM
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Date registered: Aug 2006
Vehicle: '99 E320 4M, '73 220D, '94 S4, '90 V8 Quattro
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Reply from another '73 220D owner

I am still trying to get my 220D running, so I have no advice for you at this point. Mine blows plumes of white smoke while it is running, and won't run well enought to drive. I need some pictures of a running cars vacuum line layout so I can piece my vacuum system back together. Is there any chance you could take some digital pictures of yours and email them to me? I need some closeup shots of the vacuum lines going from the pump back to the injection pump, and around the other side of the motor as well. Are you driving your car regularly? What fuel economy are you getting?
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post #4 of 6 (permalink) Old 05-16-2009, 09:22 AM
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white smoke could be water or oil.the vacuum pump on the front of the engine has a diaphram that goes bad.disconnect the vacuum line from the intake manifold and check for oil.the diaphram can be replaced (not the whole pump) leave the line disconnected and run the engine for awhile and see if the smoking stops.There is another diaphram in the back of the injection pump-check that vacuum line for oil as well.
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post #5 of 6 (permalink) Old 05-21-2009, 05:13 PM
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Vehicle: 90 300 SE ,85 300 GD
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White smoke could indicate a blown head gasket as well.
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post #6 of 6 (permalink) Old 05-26-2009, 07:24 AM
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I can take some photos of the car for you, I will have them up this week!!

1984 300sd -
1969 220d -
1997 Chevy Suburban -
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