W123

85 300d Injector Nailing

Kent, I am having trouble with one of my five injectors nailing. Could you lend some advice? History: I sold my 82 and bought an 85 with less miles. I noticed that it was running a little rough and was smoking pretty bad. I figured that this would probably be cured easily so I brought it in and did some services on it including valve adjustment, diesel purge, cleaned the ALDA lines, and ran some 85 plus in the fuel. It continued to smoke (though not as bad) so I thought next that it was probably the injector tips so I bought the injector tips from you and followed your instructions on how to replace them and clean the injectors. I reinstalled them and no dice, still smoking and it was then that I noticed the nailing (I cannot remember if it was doing this before. It’s possible).

Chassis Model Number

W123

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Diesel Engine Specific Aid

1982 300td - Do rear headrests exist?

I *think* I have seen some 300td wagons with rear seat headrests. My 1982 version does not have such things, but I am interested in them given that I often carry passengers in the rear seat. (By rear seat, I am referring to the actual rear seat, not the 3rd row flip-up seat.) Any info about obtaining / installing would be greatly appreciated. Thanks, Dale

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Chassis Model Number

W123

81 300D Big valve stem mistake

Kent, OK, I know I could have completely avoided this problem if I had only been using your instructions. But (& it always starts that way) I had replaced 2 sets of valve stem seals in the past 6 months using your instructions & I thought I knew the steps. Yup, the one biggest warning you give was what I did: removed the nuts on a stem & it dropped down. The cam is in the 1 o'clock position & the stem is about 3/4" from the surface.

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Chassis Model Number

W123

123 126 diesel vacuum leak diagnosis

My 1985 300TD has a vacuum leak. The engine won't shut down without using the manual stop and the door locks don't work. The brakes and transmission are working fine. Does the fact that the brakes and transmission are working while the shutdown and doors are not, help in locating the leak? Or, do I follow all the usual steps (as described in Kent's vacuum source leak detection manual)? [by the way, is it possible to search the forums?]

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Chassis Model Number

W123

Transmission vacuum shifting valve keeps dying

I've got a 81 300D. The transmission vacuum shifting valve went bad & it started shifting hard & going back & forth between gears. I replaced it with a good valve off my 'spare parts' car. The transmission started shifting like perfect again. However, after maybe a month the car is shifting hard again. I suspect something on the car is killing this valve.

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W123

78 300D lost power on highway and stalled, now wont start

I was recently driving down the highway when my 300D seemed to be starving for fuel. It had the usual symptoms, sudden loss of power, no engine response when I hit the gas. So I coasted over to the side of the road and as soon as I stopped, the engine shut off. Now my car won't start. I replaced both fuel filters a week before and have since replaced the glow plugs and still to no avail. I have checked the voltage at each plug and all 5 have power, the engine is getting fuel (although I don't know if it's getting enough) but it just cranks and won't fire.

Chassis Model Number

W123

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Diesel Engine Specific Aid

1985 300TD hood hinge replacement

my hood hinges on 85 300 td wagon got all bent...on one side the hole in the engine compartment that the hinge connects to rusted out...can i just change one side...trying to do this and having a hard time replacing the 13 mm bolt that goes through the hinge into the body of the car can't get a socket wrench in there and can't get enough pressure putting the bolt into the hole to get the threads started...am i making any sense? any recommendations??? thanks for reading...

Chassis Model Number

W123

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Diesel Engine Specific Aid

Fixing up 78 240D - where do I start?

Hey everyone, So this is my story and I'll try to keep it as brief as possible. I recently bought a 78 240d though an auction on ebay, pretty much sight unseen. This is my first mercedes, let alone a diesel. The car is pretty solid for what I gave for it, hardly any real serious rust,body is actully real straight, and besides a couple of small items everything seems to work.

Chassis Model Number

W123

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Diesel Engine Specific Aid

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