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Posted January 15, 2009 - 08:01 PM
Posted January 15, 2009 - 09:32 PM
Posted January 16, 2009 - 08:30 PM
I had the same problem not 3 weeks agao. It was the valve guides (exhaust in my case). However, in your case it could be the oil seals on the valves, the guides, the valves themselfs (maybe need to be lapped?), or the rings. Theres only so many spots oil can leak in, which causes white smoke when cold. If you take the head off and go get new guides, do yourself a favor and get some new rings and put them in while your into the engine that far, it's literally like 20 more minutes worth of work.
From what you described, I wouldn't think its a jetting or mixing problem, probably early signs of wear. Before you do anything to the engine on my behalf, please buy a new spark plug for rich/lean testing. If your jettings right, I'd go for the valves (lap, oil seals, guides) and the rings.