I removed cowling with the intend of having him to just tighten the oil dip stick tube and safety wire it again.
But then I found oil on top of dog house which is very unusual. So I removed some panels and he told me it was leaking from the intake push rod tube seal. After taking a look at it myself, I agreed with his finding. It was suppose to be a quick and easy job. He later found another problem with another unrelated part which wouldn't be fixed that evening so I just left the plane with him thinking he would quickly put the tube back on after cleaning it. I went to his shop again next day and I was shocked to see both tubes removed and one is cracked.
Both tubes got painted; Not just one like I mentioned earlier.
He never actually billed me for 6 hours. I got really worried after seeing him worked on this task for about 4 hours, on and off in span of 2-3 days, not counting the time waiting for paint to dry, and the tubes wasn't even back on yet.
In the end he agrees that this task took too long and charged me for what it was supposed to cost.