I started my car up this morning to go to work and it ticked over really rough and also had lots of white smoke pouring out the exhaust. By the time I had driven to the train station it had stopped smoking and was running fine. On the way home it did the same again but there was more smoke this time. The coolnt has gone down a bit. its a 2000 w reg 1.4 8V clio. hoping its not the gasket but im pritty sure it is. anyone got any advice?