I get a coolant smell upon startup, yet there is no loss in coolant level in the expansion tank. In fact the level does not go down over 600 km of mixed operation. What I do see when I start is white smoke from the left side pipe lasting only for a few seconds and the most important issue for me is a very lazy startup after the engine has warmed up to operating temperature, shut down for a few minutes and then restarted. I am wondering whether a drop of coolant may be entering the combustion chamber when the engine is shut down, causing a "hydro lock" partially when starting up the warm engine. Under cold startup the starter motor turns the engine over with gusto. I can also report that the forward left side spark plug porcelain is white, while the other plugs are tan in colour. All replies are appreciated.