The smoke is not that bad and I do notice some on acceleration - I think it's a little worse than before...I'm not too worried about the smoke at this point - except as to what it tells me about the injection pump timing. I'm sure I had smoke before, just didn't pay much attention...

This car has the MW injection pump with the mechanical governor.

I really went to timing this thing because of new injector nozzles, sluggish starts from stop, and then the engine pinging - which was VERY noticeable on the way home from Ohio. Advancing the timing (moving the pump CLOSER to the engine has helped the pinging especially)...And I didn't touch the nuts on the pump flange and I have a new air filter.

Now, I am more concerned about the timing chain and if I need to change it out before I leave...

I have read thru all posts regarding replacement vs. key, and I don't really see the benefit in putting in a key, especially since I suspect this is the original chain (I have maintenance records going back years and I see where changing the chain was recommended, but I don't think it was ever done). If I decide to replace the chain, I am going to replace the tensioner as well. Has anyone done this? Do you really have to remove the AC and bracket, as well as the fan and water pump pulley?

I will experiment with the timing issue AFTER I sort out the chain issue...

ryan

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RG Newell

1984 300D
1972 250
1986 560SL
1991 300CE