Hello, I have a 4 cylinder 1.8L DOHC engine in my car which was recently remanufactered.

The engine feels quite well and it's not burning the lubricant and making smoke anymore while running. The problem I'm having is that AFTER the car has been parked for a long while, usually overnight, it burns lubricant and produces smoke for a little while. I have found evidence that the lubricant only enters one combustion cam because that lonely spark plug becomes very dirty and I have seen in wet in lubricant. I am constantly checking the lubricant level and it goes down smootly like a litre every 2 weeks. Is there a possibility that the seal (an o-ring perhaps?) In one of the valves in the particular cylinder is leaking lubricant into the combustion cam only when the engine is stopped?