<VV> blue smoke on start up.

[richard white]

 I would guess a bad valve guide if its occasional, perhaps that piston if its at top center can suck oil in on the intake stroke on start up. Assuming its an intake. Radial engines were notorious for this for those of you who remember. If its occasional I wouldn't worry until it starts doing it all the time. You could do a compression check. Of course you might find something you don't want to know about. Maybe better to let sleeping dogs lay.
Rich

       
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