timing belt replacement question

[jick.cejoco]

1. advisable ba na magpalit ng timing belt set pag bagong bili ung kotse na second hand 141,000 kms casa maintained na chevy optra ... di ko pa makita sa casa records kasi kung kelan napaltan e... baka due na sya?
you're not sure if they have been replaced- to be safe as not to cause a road hazard when your vehicle stalls and to avoid inconvenience, i personally would recommend replacement and record the mileage and date of replacement
2. pag magpapalit ako ng timing belt , dapat ba kasama na ung idler pulley, tensioner at timing belt, ung water pump ba kasama pa?
these components have the same mileage as the timing belt itself and are designed to last just as long. to save time of reopening it for maybe just an idler pulley, these parts are MAW (might as well) to include all oil seals that maybe exposed when the timing belt cover has been removed
3. kung bibili ako ng timing belt pwede ba ung replacement brand lang? o dapat original? mahal din kasi ang presyo...
most aftermarket parts are just as good as the OEM (original equipment manufacturer). in fact, most only change the box and same contents
4. kung papalitan ko na, sa casa ko ba papagawa? o sa mekaniko sa labas, saan recommendado nyo na marunung at magaling sa chevy cars? tga las pinas ako..
just find a trusted, trained, experienced and equipped technician, this is not rocket science, it is just a timing belt replacement
5. magkano ba inaabot ng pagpalit nito based sa experience nyo....
sorry, don't know the going rate of labor per hour at your locality
Patulong po pasagot pleaasse salamat

details: chevrolet optra 141,000 kms 2004 model automatic

good luck!