Relaks lang cathy, la naman masama sa first post ni brain_mafia imho. Just stating an observation.
BTT: Kung tappet lang yan (or maybe valve clearance din), no need for top overhaul yan. Pineperahan ka lang nang casa sa pinagssabi nila. Have it checked at other shop, out of warranty na eh. Kuha ka 2nd opinion pero dapat talag puwede mo singilin ang casa kasi wala naman problema nung pinasok mo eh, insist mo na may kapalpakan sila.