I have a Peugeot 206 zest 2 '05 plate and it has recently had the heater matrix replaced as it was leaking coolant into the passenger footwell. The problem seemed to be fixed until two days ago. Started her up as normal, got about 5-10 mins into my journey and saw smoke coming from the bonnet so I pulled over. I never thought to check my coolant level even though I have had this issue before from a cracked tank! I did check my coolant yesterday after the last time about four days before and the level has dropped to minimum but no signs of it leaking into the footwells and I have felt all around the tank and can see no signs of any cracks. So unsure where it could be leaking from to drop the level so quickly and why my engine is overheating so dramatically?