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Old 09-18-2010, 05:38 PM
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Decel Smoke

Engine is fresh rebuilt 406 SBC with new rings and heads. When accelarating hard, I am getting a small cloud of blue smoke between shifts. (manual)

From my research I understand that this can occur from oil entering the carb from the PCV line during a shift. I have checked this line after a hard run and I do find a bit of oil in the line.

I am wondering what the best method is to prevent this puff of smoke?

Valve covers and aftermarket PCV are new and seem to be working fine. There is a small diffuser inside the valve cover, under the PCV hole, as well.

Would installing a catch can between carb and PCV help, or any other suggestions?

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Old 09-18-2010, 07:00 PM
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I would look at the baffle for the pcv valve. sounds like it needs a modification to work well. It could be oil getting in over the top getting to the valve . i would try to do something that would not interfere with the appearance under the hood.
Could also be you need a pcv valve with a heavier pellet in it.
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Old 09-19-2010, 10:21 AM
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Try removing the pcv from the valve cover and driving.What intake and gaskets are on it,sometimes the bottom of the intake don't seal and they pull oil from the valley.
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