8 valve 1.6 an 1.4 engines are dead easy, for easier starting after replacing headgasket advise small amount of oil down bores which helps compression and squeeze hydraulic lifters in a vice as well.
also on vauxhalls easy way with head torques up to 1800cc 25nm 60d 60d 60d
1800cc and above 25nm 90d 90d 90d petrol engines .