bought a 1.4 16 valve astra for the boy 6 weeks ago with good history and service record but been drinking water for couple of weeks now with no obvious leaks so thinking head gasket failure even though no sign of oil in water,put some bars leaks in today and boy does it not like it !! oil is now a dirty brown colour with obvious emulsifying on the filler cap and water is cross contaminated,bloody great.questions are how much for a garage fix and is there any comeback on the dealer who sold it ( yes I know good luck !!) 
any thoughts out there guys peter.c

any thoughts out there guys peter.c
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