W123

White Smoke at Idle on WVO ('81 300D non-turbo)

I've been running WVO for three years without too much smoking. Now I have lots of white smoke at idle and low speeds after commute home from work. I've noticed this only in the evenings on my way home and not on my way to work, even though the conditions are very similar. This started a little after replacing the injectors with Monarchs that were professionally pressure tested. The other correlation is the recent onset of cold temps around 40-50F. A few other pieces to the puzzle:

Chassis Model Number

W123

Forums

SVO Fuel Conversion Specific Aid

1984 300D Turbo Water Leak

I have what appears to be the typical water leak which comes in through the front passenger side leading to puddling in the rear passenger side. I have cleared the drain holes under the hood and repaired the rust under the battery using the miracle paint and cloth method, however I still have the leak. It appears to me that I should replace the front windshield seal based on what I have read on this web site. Is there anything that I have overlooked or other areas that I should check to stop this leak?

Chassis Model Number

W123

Forums

Body and Interior Specific Aid

1979 300TD No Heat!

My heat has stopped working just in time for the cold weather! The temperature control unit works fine except for the complete lack of heat (the buttons all seem to do what they're supposed to). The heat gauge on the dash shows that the engine is getting hot, but none of the temp. control settings (defrost, bi-level, etc.) make hot air blow. The air coming out of the system is the outside temp.-frigid! I recently rebuilt the vacuum pump after the diaphram tore and a little oil got in the lines. But this sounds like an electrical problem, no?

I recently got the Mercedes factory HVAC manual, but I don't know where to start with this problem. I have the vacuum and wiring diagrams and now have a rough idea of how the system works (it's complicated!).

Chassis Model Number

W123

Forums

Body and Interior Specific Aid

1981 240D Idling rougher after valve adjustment

Before valve adjustment, car idled fine. Immediately after valve adjustment car idled fine. Probably after 1,000 miles of driving, car idles rough at a stop in drive or in reverse but idles fine in park. Another change is that it has gotten cold. This was a florida car and not used to the cold. I did install a block heater from you which helped with cold starts.Turning the idle adjustment knob on the dash to the left increases RPM and helps idling.

1.How do I adjust the idle so it will run right again without having to adjust the idle knob on the dash?
2. Is it ok to drive the car with the idle adjustment knob turned to the left a little bit?

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

82 300D: Starter slow/nonexistant, replacement needed?

I have an '82 300D. When I try to start it, especially when it's cold, the starter works very slowly and feels like it is about to die. Seems like a dead or dying battery, but tested it and it's fine.

However when I hit the gas pedal when cranking, it does catch and start. This problem is especially harsh when the car is cold.

Do I need to replace the starter? Is there something else I'm missing? This car is my daily driver and I use it to cart my kids around and get to work, so I'm afraid to be stranded.

Thank you!

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

Pages