I had a similar problem occurring on my 120 petrol (a few years back when I had it). Turned out to valve stem seal wear. After the engine had been running for a while the oil is more "runnier", which allows it to seep past the valve stem seals and into cylinders after you turn engine off. Hence why the initial smokiness when you next start.
Another indicator of valve stem seal wear is that the engine will also smoke a little when you lift your foot off the accelerator because of the higher vacuum that results from intake air-flow being restricted.
Another indicator of valve stem seal wear is that the engine will also smoke a little when you lift your foot off the accelerator because of the higher vacuum that results from intake air-flow being restricted.
Comment