rebore

[devond]

tanong lang po, wala po bang magiging problema kapag ni rebore ang engine block? delikado po ba to o normal na ginagawa po sa makina to?

[jick.cejoco]

tanong lang po, wala po bang magiging problema kapag ni rebore ang engine block? delikado po ba to o normal na ginagawa po sa makina to?

if the engine is that of models up to the '90's, it might be okay provided you have the oversized piston and rings for the new bore. today's engines are made with thinner block walls or aluminum walls in an effort to reduce weight. some cylinder bores are not designed to be rebored because they have a wear resistant liner that machining it would render the engine block useless.

[devond]

salamat po sa reply boss jick. model 1993 po yung auto ko, 2e engine po. so okay lang po na marebore yung makina ko? ano po ba ang mga papalitan kapag inoverhaul ang makina?

[jick.cejoco]

salamat po sa reply boss jick. model 1993 po yung auto ko, 2e engine po. so okay lang po na marebore yung makina ko? ano po ba ang mga papalitan kapag inoverhaul ang makina?

first of all, why the rebore? are the cylinder walls damaged? the overhaul parts and supplies includes connecting rod bearings, main journal bearings, thrust spacer, piston rings, gasket set that includes air induction system gaskets, o-rings and seals. oxygen sensor safe rtv (formed in place gasket) sealant. exhaust gaskets and of course your expendables like engine oil, anti-freeze/coolant and the oil filter. if your engine needs a rebore, investigate the cause of the cylinder bore damage. usually, in the country, the air filter is not serviced/replaced or sometimes is not even there resulting in a dusted engine that bores are abraded by the air borne dust.

[devond]

2years ago po kasi nagpalit na ako ng piston ring, valveseal, valve guide. yung nakakabit po dati .25 na piston ring, hindi na po standard.kaya .25 size na rin po binili ko. nung ikakabit na po ng mekaniko malaki po pla yung .25. sabi po ng mekaniko tinabasan yang dating nakakabit na piston ring, kya yung binili ko tinabasan din po.ok naman po sya,nawala yung usok. tapos po after 2years po mausok na uli ngayon, bluish ang usok. pinakita ko po sa ibang mekaniko at kinwento ko po sa kanya kung ano ginawa namin noon. tapos sabi po ng mekaniko ngayon kya daw kinabitan ng .25 piston ring kasi malaki na yung wall sa piston, di na daw pwede lagyan ng standard na size ng piston ring. tapos sabi po nya hindi din maganda tinatabasan ang piston ring, kasi daw po pag kinabit yung piston ring nawawala yung pagkabilog, nagkakaron daw po ng space sa pagitan ng piston ring at wall. kya dapat daw po gawin e irebore para maikabit ng maayos yung size .25 na piston ring.

[jick.cejoco]

2years ago po kasi nagpalit na ako ng piston ring, valveseal, valve guide. yung nakakabit po dati .25 na piston ring, hindi na po standard.kaya .25 size na rin po binili ko. nung ikakabit na po ng mekaniko malaki po pla yung .25. sabi po ng mekaniko tinabasan yang dating nakakabit na piston ring, kya yung binili ko tinabasan din po.ok naman po sya,nawala yung usok. tapos po after 2years po mausok na uli ngayon, bluish ang usok. pinakita ko po sa ibang mekaniko at kinwento ko po sa kanya kung ano ginawa namin noon. tapos sabi po ng mekaniko ngayon kya daw kinabitan ng .25 piston ring kasi malaki na yung wall sa piston, di na daw pwede lagyan ng standard na size ng piston ring. tapos sabi po nya hindi din maganda tinatabasan ang piston ring, kasi daw po pag kinabit yung piston ring nawawala yung pagkabilog, nagkakaron daw po ng space sa pagitan ng piston ring at wall. kya dapat daw po gawin e irebore para maikabit ng maayos yung size .25 na piston ring.

so your next oversize bore is .25? is this in millimeters? have all the bores checked for roundness and taper. this will require oversize pistons along with oversized piston rings. the wear and tear might be attributed to a possible overcooled and/or dusted engine, maybe from using the wrong grade lubricant. correct any discrepancy before the problem recurs.