i have a astra mk4 2001 1.8 16v sxi 5dr 63000 miles just lately i have to keep topping up the coolant, i know this could mean one or two things. (either a leak or head gasket) i have looked for all the usual syptoms. gunge under oil filler cap. looked for leaks and there is nothing. there is no smoke what so ever. only at cold start, on cold days. if the head gasket has gone has anybody got any ideas of how much this would be. and have you got any advice on what it could be. thanks for reading lee.
p.s sorry if i am in the wrong place but i am new to this site.