[Herb_911_76]

Hi, I dropped my heat exchangers to find a source for warm up smoke. It appears I might have a bade exhaust valve guide on cylinder 2. Oil/soot is building up in the exhaust port and appears to accumulate in the heat exchanger. This is what probably causes severe warm up smoke. After a while it seems to stop instantaneously and no then there is no visible smoke during accel or decal. I have not removed the spring to see if the stem is loose in the guide, as it is too cold to work on it. But I am trying to prepare myself for work in the spring. A couple of questions: Can the valve guide be replace without dropping the engine? Can anybody talk me through the steps? I guess if I position the piston all the way out, I shouldn't have be concerned with the valve falling in (falling up?). Any help would be appreciated. Note that all other exhaust ports look normal.