rickrogue wrote:is it common? yes for older vehicle. but most vehicle now a days does not include valve train adjusting to their maintenance schedule.
not true. your valves do need adjusting, if you develope common symptoms. its called an "valve adjustment". all sportbikes require this service at 15,000miles. those race engines are as "modern" as they get. some cars, are not as built well(American cars), and will require this type of tune-up earlier than others - but ultimately all will need it sooner or later. there will be 'cam followers' that will wear with time, and will result in a tiny gap which will result in poor engine performance. its not apart of the maintenance schedule, and neither is the replacement of many other parts that wear or go bad. just because something is not on the silly maintenance schedule in the user handbook, is not indicative of the part(s) not needing service and or replacement.
rickrogue wrote:ticking noise could be anywhere, nissan are awesome with their timing chain plastic guide which leads to same ticking noise until engine warms up.
the plastic guide isnt what leads to ticking. its the few seconds where the oil pressure is not up. when the engine is just cranking over, the oil pressure isnt high enough for the timing chain tensioner to push on the plastic guides to help tension the slapping chain(its the chain you hear thats slapping the first few seconds)
OFTEN, THE SLAPPING CHAIN IS ALSO AN INDICATION OF LOW OIL LEVEL, OR WORN OUT OIL.