1982 300D

Well, I finally had a chance to work on the car in a long while today. I was going to adjust the valves, but I just realized that I left the block-heater on overnight, so as of an hour ago, all the coolant in the engine was pretty darn hot. How long do I need to wait before the engine is cool enough to adjust the valves properly? It's in the mid 40s outside....

which brings me to another question...it will get into the 20s tonight. I'm have no problem working in such conditions, but I'm wonderin if that will affect valve adjustments. I posed this question before, but it was linked to adjusting the valves when it's in the 40s. What about below freezing?

Thanks,

Pete.

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