W126, BENZ AID - COMMON QUESTIONS AND ANSWERS

Cold air filter available, possible oil blow by fix?

Hello, I have an old engine that is blowing by oil and making my air cleaner very oily, so in lieu of this I have seen cold air systems on 300tds ,& I was wondering if this would 'fix' my dielema of having to replace the air filter, because it is a direct system, seperating the air and oil. Am I understanding this right, I have only seen pictures so ... just wondering...any insight out there... Thanks ! James

Chassis Model Number

W123

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Diesel Engine Specific Aid

1983 Mercedes 300D-T not starting

My car will no longer start. For a while when I turned the ignition key, I had to wait between 2-5 secs for the engine to start. Now, the starter is turning over, but other than that--nothing. The glow plugs seem to be good (I tested them at the relay without removing); the battery reads 12.3V (I know this is on the low side, but even with the car jumped by my other working vehicle, the car still won't start); and I just changed the fuel filter (I've been running biodiesel for 11 months and have changed the fuel filter 4 times since then) thinking this might be the issue. Still, nothing....

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Diesel Engine Specific Aid

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Chassis Model Number

W123

Diagnosing a worn out diesel

Hello, I have excessive oil blow by comming out the breather tube, so much so , that my air filter is about 35% covered in oil. I also have a distinct metal knowcking noise at idle speeds, seems to be comming from the front of engine but cant be sure. I read your " why does my diesel leak" manual and it said something about a cam going bad...how do you check this? I have done my valves( also with your cool tools- excellent!) and forgot to check the cam, and Im not sure what to look for. Also how do you check the timing chain? Thanks in advance James

Chassis Model Number

W123

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Diesel Engine Specific Aid

87 300TDT Turbo spool up LOUD whine, engine runs but sluggish.

I have a 1987 300TDT with 119,000 original miles bought a year ago from the original owner. Yesterday while accelerating abruptly in traffic I heard a loud wind up sound (like the turbo was out of control), a loud "clink" sound from under the hood, and a puff of grey smoke followed- all within a 2 second range. The rest of the way home (about 8 miles) there was a lack of power and that same wind up sound- only in the range that the turbo would normally kick in: My question is of course... What is it and how to fix it? this is the 603 Diesel 3.0L 6cyl.

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Diesel Engine Specific Aid

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Chassis Model Number

W124

560 Engine in 420SEL?

Hey Kent, Are the 420 block and the 560 block about the same size? I found a valve cover thats off a 560 that will fit my 420. Are the block and heads the same, just the stroke is different.I am going to pick and pull tomorrow for the valve cover and safety belts. Should I just grab the engine and use some parts for my 420 or even put the 560 inplace of the 420?

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Body and Interior Specific Aid

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Chassis Model Number

W126

differential removal

Kent, Can you give a short summation on how to remove the differential on my 82 sd? I recently purchased one that howls very loud, and the previous owner supplied one with the car. I do have a car lift, tranny jack, tall jack stands. Just looking at it, I would unbolt it from the body, lower it, drain out lube, take rear cover off, remove axle clips (Pin), remove rear wheels, loosen axle nuts on hub, and go from there. Any help is appreciated. Thanks, Bill

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Body and Interior Specific Aid

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Chassis Model Number

W126

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