Re: Smoke from exhaust after idling

Posted by fredkanter On 2016/7/2 22:02:34

Your compression readings are impressive, means valves and top rings are 100%. By putting 5w 20 into your 30W you have diluted it and decreased the viscosity. The black/grey smoke is not from oil consumption so a $5k rebuild which would include valve job and new rings would do nothing for black smoke which is from a fuel or ignition problem.

Follow a logical trail and diagnose the problem(s). Oil at the base of the carb cannot be from blowby as compression blowing by the rings wind up in the crankcase and exits via the road tube down near the road. Impossible to travel upwards to the carb base.

If the only problem is some black smoke on acceleration and you do nothing, what will be the problem driving like that ????