Some white/blueish smoke while idling - PeachParts Mercedes-Benz Forum

juanesoto · #1 07-29-2008, 01:56 PM

Hello folks! It's been a while since I posted... I switched jobs back in march and well, this has been a hell of a mess, but now things are back on track and my old benz is now getting the attention it deserves.

My issue is that I'm getting some white/blueish smoke while idling in traffic or while gently accelerating when cruising. The engine is running really good though.

In an attempt to reduce the smoke mentioned before, last week I installed a set of 261 Bosch nozzles that redassag00 sold to me. The job was done by a Bosch certified shop and the results were really amazing. Lots of low end power, reduced fuel consumption and smooth idle. However the smoke is still there.

Last saturday I replaced the valve stem seals and adjusted the valves as well, with the same intention, stop the smoke. I got some nice results, specially in the morning, as there is about half of the smoke there used to be. I also changed the engine oil and all the filters. However, my problem was not solved by doing this.

I've noticed some oil comsuption between changes, about half a quarter every 3000 miles (5000 km). There are no leaks, so my bet was that the valve stem seals were the reason. However I still have the same amount of smoke in the circumstances I mentioned.

Now I'm cofused, as I beleive the rings are in good shape. The engine was overhauled about 60k miles ago and it was properly broke in...

Is there any chance my problem is engine oil mixing with diesel inside the IP? This would be a lot better and easier to solve...

BTW, I've noticed that when I leave the engine idling for a couple of minutes and the smoke starts to appear, it seems like it kind of misses a fire stroke. Not bad as a totally dead cylinder, but you can hear a slight miss and also you can feel it if you're touching the engine...

Any sort of advice is greatly appreciated