yeah, its probably loose or the block is corroded on the deck upon which the mechanics use a paper material gasket and try to reuse the headbolts which never works.
when redoing liana engine head - a brand new genuine or replacement steel gasket along with a new set of headbolts are required. The finish on the block and head should be less than 30Ra ideally (very smooth shiny) and the use of a torque wrench along with the yield pulls are mandatory to clamp it tight.