overhaul engine is a tedious task... only attempt it if u have all the knowledge and tools... if not, better send to workshop.... even at workshop, mechs need to take a few days to complete... its not that easy....
usuali no nid to waste money if ur engine stil ok.overhaul oni when makan minyak hitam n kluar asap putih. change valve seal and grind valve should be enuf. unless kena piston ring then oni u overhaul lo.not cheap leh.
Just for our discussion...exhaust system in cars includes muffler to reflect the sound waves produced by the engine and reduce high pressure from internal combustion. Hence different capacity engine use different...