Diesel Engine Specific Aid

1985 300TD Doesn't turn off

I have a 1985 300TD and i can take the key out and it doesn't stop. If I press the lever on the engine it does turn off. I'm pretty sure the problem has to do with the vacuum system but I don't know how to test it. Could someone please send me a diagram of where the vacuum system is and instrustions on how to test it. I'm also leaking from a fuel injector could that cause my problem?

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1983 300D MELTED "C" FUSE

AN IMAGE OF THIS PROBLEM IS AVAILABLE AT http://www.gosla.com/EBAYPICS/melted.jpg

My car has been sitting for several months now as I've done various work to its engine. The moment came to start the car and it wouldn't start. The horn wouldn't sound. Some lights worked. I believe the problem is that the battery went dead while it was off the road. It's an old battery anyway and I'm about to drop a new optima into it.

While trying to find out why it wouldn't start, I checked the fuse box. All aluminum fuses were corroded. I already have the new fuse kit that is sold here - just didn't get around to putting them in.

Chassis Model Number

W123

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Diesel Engine Specific Aid

1980 300SD Cylinder misfiring while idling

The more I drive this old mercedes the better I like it. Recently I had new motor mounts installed and asked the mechanic that did the work about the engine still rocking and rolling in the engine compartment. He said that one of the cylinders was missing a hit while idling. When it's rev'd just a little it does just fine and on the freeways/hiways it just absolutely purrs. Could it be a glow plug or compression? Any hints would be appreciated.

Chassis Model Number

W116

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617 turbo valve stem seal differences?

Hi all; Well, I screwed up. I was just about to install the valve cover after replacing all 10 rubber valve seals and a valve adjustment and realized that I installed the seals on piston #3 backwards... I don't want to go back and do the job over now, if I can get away with it. I planned on changing the chain with the next valve adjustment, and I wouldn't mind getting another valve seal kit and re-doing the job then. Anyway, what would the consequences be of "leaving it as it is" for the next 12,000 miles or so?

Chassis Model Number

W123

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Diesel Engine Specific Aid

82 300D Idling too fast

Hi Kent, Brook here...(of the Larry Mans clan)... 1982 Turbo W123 My car (Sherman) is idling way too fast these days. I took it into my MB shop at closing time the other day, so they didn't have much time to diagnose but we did notice that the "arms" that one pulls on from the engine to "rev" the engine (say, during a diesel purge) are sticking somewhat and not allowing the engine to relax into a normal idle. My mechanic sprayed some lubricant on the arm "joints" hoping that would release them a bit and yet after a few days, it's still happening.

Chassis Model Number

W123

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Diesel Engine Specific Aid

300D Hard Start Hot and Sporadic Power Loss?

Hi there. First i want to thank everyone at MercedesSource for all the help to us. Thank you. I lump these two symptoms together because they seem to possibly be related. First, is the regular occurrance of hard starting only when the engine is still warm. My engine starts great when completely cold, i never have to crank more than a second. But most often when i return to my car after it has sat for up to 2 hours and is still warm , i have to crank three times usually, and sometimes 4 or 5. And then, sometimes there is a real loss of power that accompanies the car after i am started.

Chassis Model Number

W123

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Diesel Engine Specific Aid

My 1985 300td wagon will not idle

My 1985 300td wagon will not idle. I cleaned all the lines, fuel filters, and even installed new injectors. I checked all the vacuum lines to the best of my ability. It is not starting as easily as it used to, takes some cranking. I turn the idle screw up so that it runs at high rpms so that I can crack the lines to see it fuel is getting to the cylinders. Everything seems to work fine, untill I start turning down the idle screw; then it stalls. I''ve tried ''everything'' but can''t seem to get it to start and idle as normal.

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1985 300D turbo - oil dripping from turbo

I am slowly working my way around the engine cleaning and searching for oil leaks. Around the turbo I have 2 leaks. One in back, (from misaligned breather drain tube) and one in front. Looking from under the car up, the boost pressure control valve (correct name?) looks like it has oil dripping from it. Not knowing how turbos work, is this a place for oil escape?

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Diesel Engine Specific Aid

83 300D Air Cleaner Bracket problems

Hello all; Regarding the replacement of the Turbo Diesel Air Cleaner Bracket on my 1983 300D Turbodiesel, how does one remove the lowermost bolt to remove it? I tried a few things, and nothing worked. Special tool? Flexible socket extension perhaps??? ALSO, In messing around with it, I found that the little metal pipe that sticks into the bottom of the air filter housing seems a bit loose now. (think it returns oil to engine???) It definitely has play - moves several inches in fact. Looks like a nightmare to get to. Is some play normal?

Chassis Model Number

W123

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