My coolant problem just gets weirder - sometimes (after even a short journey) the level drops. Not by much, but it drops. Other times, after the engine's cooled down, the level seems to rise above where I last filled it to. What the...? And just now I noticed a brown creamy deposit inside the oil filler cap. If this turns out to be head gasket, I'll be well p****d off - that was only done last year. £350 - ouch!!!