its been a year now..same behaviour
no tapping noise on cold startup but again as heat gauge reaches mid, tapping noise starts.
engine head not opened after that work and run approx 8000km.
suzuki 3s mechanic says to overhaul engine to resolve this problem which include replacement of tappets, rings, valves headgasket etc (car does not reduce oil)
roadside mechanics have different opinion.some say only lifter replacement.while some say lifters dont go bad.only head will be sent for grinding.
my query is still same.Why it produces tappnig noise on warm engine?? why not on a colder engine.