Kalansing sa makina

[ohnose12]

Hello! first time ko mag post dito,

gusto ko lang malaman, bumili kasi ako ng nissan sentra gx 2006, pina check ko naman ito sa mekaniko bago bumili, at ang una nyang napansin ay ung kalansing ng makina, pero in assure naman nya ako na hindi ito makaka apekto sa performance ng kotse, maluwag na barbula daw - upon searching nalaman ko na ito pala ay ung intake at exhaust valves, tatanong ko lang, sabi kasi ng mekaniko ko if ever daw buksan ung engine ay aabutin daw ng 15k ang pag papasikip ng barbula, totoo ba ito? wala kasi akong alam at first time kong bumili ng kotse, at kung meron kayo ma popost na alternatives para makamura ako sa service charge ay lubos kong tatanggapin, salamat, sinubukan ko rin pala ito i drive at ok naman sya, napansin ko lang na may kalansing nga ung makina upon start up,

[vinj]

If the "clatter" comes out during start up, that's the possibly the timing chain and tensioners. Normally this isn't changed on the Sentras engine and if it makes noise then better to have another mechanic take a look for a second opinion then replace the tensioners and timing chain if need be. This is due to lack of proper maintenance by the previous owner such as not changing the oil regularly.

What's the mileage of your car? Are the service records intact? Have you done an oil change already on your "new" ride? If not, pa-change oil, change air filter, transmission fluid, coolant, fuel filter and clean MAF (Mass Air Flow) Sensor w/ electric contact cleaner muna. General service. Baka matanggal pa yung start up clatter with the change oil.

Go to another mechanic/shop also for a second opinion. I think he's screwing you for your 15K. First thing, the Nissan engines have hydraulic valve tappets which are self adjusting and its very quite unlikely it will need replacement of the "shims". My 1993 Sentra 1.4L is still running on its original timing chain, tensioners and valve clearances are still okay (regular change oil lang talaga katapat).

[ohnose12]

salamat po sir, same na same kayo ng sinabi ng mekaniko, except dun sa part na bubuksan daw ung makina kasi un ang sinuggest nya sa akin, ang sabi nya rin eh hindi naalagaan ng oil change itong kotse, by the way napalitan na po ito ng oil, oil filter, spark plugs and ung air filter kaso nandun pa rin ung kalansing or clatter na sound nya, ang last resort ko po ba eh ung timing chain and tensioners? tsaka ano po ba ung clean maf? ung mileage po ay 54813 sir

[yebo]

kalansing, like the sound of a little bell? worn out cylinder liner and piston na yan! due for major overhaul na yan, walang alam mekaniko na sinama mo. tumama lang siya dun sa part na hindi naalagaan ng oil change, pero mali siya dun sa kalansing part. isa lang ang kakalansing sa makina, yung piston pag maluwag na sa cylinder bore. parang bell ang tunog, ting ting ting, kasi umaalog na yung piston sa cylinder. palit ka na ng piston, piston rings and cylinder liners. and since worn out na yun mga parts na yun most likely worn out na din ang ibang parts.

[vinj]

Kung timing chain and tensioner, the clatter will come from the right side of the engine during start-up. IF not, check mo rin yung dinescribe ni Yebo... although mababa pa mileage ng car mo para magkandaganyan; di nga masyado naalaga ng previous owner.

Yung MAF sensor is right after the air filter box. Yung may wire na nakakabit. Sensitive part yan so pag nilinis, don't touch the inside of the sensor and just spray the electric contact cleaner into it.

[ohnose12]

thanks po sa lahat ng replies, nag pa second opinion po ako kahapon sa isang mekaniko ulit, at sabi nya eto daw ay normal na tunog lang ng makina at masyado lang daw ako nerbyoso, hindi ko kasi sya ma describe ng mabuti sir eh, hindi sya clatter eh, hindi rin po parang bells ang tunog hehe, pero anyways kahapon binuksan din ng mekaniko ung engine ba yun tapos tinignan at ok naman daw ung timing chain, etc, salamat po sa lahat!ang ni recommend nalang po nya sa akin ay ung pagpapalit ng oil para mamaintain ung makina, thanks sir vinj and sir yebo,

[vinj]

That's good to hear.

Palinis mo lang yung MAF and regular service, good to go ka na.

Another thing. Medyo mahina ang power door lock solenoids or mechanism ng 2001 and up Sentra. Always make sure when you lock or unlock, no one is pulling the door handles at the same time; pagnagkasabay, dyan nasisira yung lock.