My car doesn't lose any antifreeze, so I don't suspect a bad head or gasket. The injection timing being off due to a newly installed chain breaking in does make sense. I really don't have time to pull the fan off and get everything lined up in order to check the timing again, but I was thinking that if the chain stretches, then the timing should be retarded, right? So I suppose I could just go straight to advancing the injection timing to see if it makes the smoking stop. But that's where the problem is, I cannot find a definitive answer on how to adjust the injection timing for the 6 cylinder. If I want to advance it slightly, how do I go about doing this?

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87 300D - Running on Veggie oil; 260,000 plus miles; Original #14 head