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  1. Join Date
    Nov 2013
    Posts
    621
    #41
    Quote Originally Posted by yellahfellah View Post
    Sir funkeemunkee, parang similar po ang name natin... Baka po mag-pinsan tayo???

    Dala-dala ko yung binaklas na engine kahapon and pumunta kami ng anak ko sa 2 machine shops. Yung isa eh maganda-ganda (near GMA7) and maganda rin po ang quote nila P30k max. and halos similar din ang gagawin nila like the machine shop na pinagdalhan ko the other day (P46K). Yung isa naman na pinuntahan namin is a smaller machine shop (along Roosevelt Ave.) pero kilala din dito sa amin and slightly different naman ang diskarte niya and much lower ang quotation 15K max. Sabi niya, instead of replacing the piston heads for an oversize one, gamitin pa rin yung dati and bibili na lang kami ng "sleeves" or "liners" and yun ang ilalagay sa loob and babawasan na lang to get the right fit with the pistons.

    Hindi na po kami pumunta sa ibang machine shop dahil po sa sobrang traffic kahapon kahit saan ka dumaan.

    As for surplus engine, lahat po ng pinagtanungan ko so far ay wala daw makuha na tulad sa model namin kasi medyo bagu-bago pa daw ang Avanza (2007).

    May I ask you, sir, kung ano po yung sinasabi mo na "4age"?
    Overbore option pala yung 30k. Yung block lang ba ima-machine shop? How about the head?

  2. Join Date
    Jan 2008
    Posts
    65
    #42
    Quote Originally Posted by miko101130 View Post
    ask mo sa machine shop kung gaano kalaki gsto nila tabas sa block mo?
    meh limit yan, after a certain point the integrity of the block and head will be sacrificed, later on it might crack or leak.
    Sir miko101130, sabi nung machine shop #3 na balak niyang lagyan na lang ng "liner" yung mga cylinder kasi less than .25mm daw ang difference. Yung mga "liner" ang tatabasan nila para magkasya yung original piston heads na puede pa naman daw, magpapalit lang ng piston rings. Mas mura daw yon compared sa magpalit ako ng oversized piston heads. Wala naman daw difference sa performance.

  3. Join Date
    Oct 2012
    Posts
    27,626
    #43
    A .25mm liner sa cylinder. Thats 2x the thickness of coke zero cans. Will that be done on 4 cylinders? Paano kaya magagawa yan?

    Engines are blocks of metal so heat transfer is ideal. A liner in the cylinder sounds sketchy imo.

  4. Join Date
    Mar 2015
    Posts
    991
    #44
    Quote Originally Posted by StockEngine View Post
    A .25mm liner sa cylinder. Thats 2x the thickness of coke zero cans. Will that be done on 4 cylinders? Paano kaya magagawa yan?

    Engines are blocks of metal so heat transfer is ideal. A liner in the cylinder sounds sketchy imo.
    Yup it's the right thing to do. Put liners on all 4 cylinders and hone it to match the piston and clearance for the piston rings and it's good to go. You need to use an oversized piston ring and shave it to the exact clearance of the liners. Buy original rings in this case.

    It's best to put liners instead to re bore your block. Also cheaper as you will not buy new pistons. Only the rings will be new. Critical here is the clearance of the rings. If done wrong your engine will have loose compression later on and will shorten the life of your engine. If done right 7 to 10 years is good maybe more it will depends on your maintenance

  5. Join Date
    Jan 2008
    Posts
    65
    #45
    Quote Originally Posted by StockEngine View Post
    A .25mm liner sa cylinder. Thats 2x the thickness of coke zero cans. Will that be done on 4 cylinders? Paano kaya magagawa yan?

    Engines are blocks of metal so heat transfer is ideal. A liner in the cylinder sounds sketchy imo.
    Sir StockEngine, wala po kasi akong alam sa mechanical and yun lang po ang naintindihan ko sa explanation nung machinist. Hindi ko rin nga maintindihan kung paano niya mapadikit yung liner sa cylinder considering high pressure duon and supposedly akyat-baba ang pistons duon... Pero ok naman daw yun sabi niya. Walang difference in performance daw.

  6. Join Date
    Mar 2015
    Posts
    991
    #46
    The machine shop will rebore your block to accommodate the liners. Just make sure they use a good liner. There are liners kasi na mahinang klase. I forgot the brand of liners our mechanic use.

    Performance would be back to 1.5 using liners but if you just rebore your block to the next bigger size then your engine would have an increase in displacement. Like maybe 1.6

  7. Join Date
    Jan 2008
    Posts
    65
    #47
    Quote Originally Posted by SkyFlakes88 View Post
    Yup it's the right thing to do. Put liners on all 4 cylinders and hone it to match the piston and clearance for the piston rings and it's good to go. You need to use an oversized piston ring and shave it to the exact clearance of the liners. Buy original rings in this case.

    It's best to put liners instead to re bore your block. Also cheaper as you will not buy new pistons. Only the rings will be new. Critical here is the clearance of the rings. If done wrong your engine will have loose compression later on and will shorten the life of your engine. If done right 7 to 10 years is good maybe more it will depends on your maintenance
    Yes po, Sir SkyFlakes, original piston rings nga ang sabi nung machinist. Clarify ko lang sa kanya kung oversized yung ipabibili niya.

    As for the competence level of the machine shop, okay naman daW ang experience ng oWner ng Auto supply na malapit sa kanila. Madalas kasi ako bumili duon kaya tinanong ko yung may-ari. And kilala naman yung machine shop dito sa lugar namin kasi matagal na daW yun.

  8. Join Date
    Jan 2008
    Posts
    65
    #48
    Quote Originally Posted by SkyFlakes88 View Post
    The machine shop will rebore your block to accommodate the liners. Just make sure they use a good liner. There are liners kasi na mahinang klase. I forgot the brand of liners our mechanic use.

    Performance would be back to 1.5 using liners but if you just rebore your block to the next bigger size then your engine would have an increase in displacement. Like maybe 1.6
    Sige po, Sir SkyFlakes, maganda po sana kung maalala nyo yung brand nung magandang liner.

    Hindi naman po issue sa akin na balik 1.5 ang displacement. Baka po kasi magkaroon ng side effect yung increase in displacement tulad ng increase in fuel consumption, etc?

  9. Join Date
    Mar 2015
    Posts
    991
    #49
    Quote Originally Posted by yellahfellah View Post
    Yes po, Sir SkyFlakes, original piston rings nga ang sabi nung machinist. Clarify ko lang sa kanya kung oversized yung ipabibili niya.

    As for the competence level of the machine shop, okay naman daW ang experience ng oWner ng Auto supply na malapit sa kanila. Madalas kasi ako bumili duon kaya tinanong ko yung may-ari. And kilala naman yung machine shop dito sa lugar namin kasi matagal na daW yun.
    Your good to go then Sir. Don't forget to ask for warranty sa machine shop at sa mechanic. Also after all is done you will have to break-in your engine. Meaning no a/c till you get to 1k kms. Our mechanic has a system where he release his newly overhauled cars in semi break-in condition already. This shortens the km needed so you can use your a/c asap

  10. Join Date
    Mar 2015
    Posts
    991
    #50
    Quote Originally Posted by yellahfellah View Post
    Sige po, Sir SkyFlakes, maganda po sana kung maalala nyo yung brand nung magandang liner.

    Hindi naman po issue sa akin na balik 1.5 ang displacement. Baka po kasi magkaroon ng side effect yung increase in displacement tulad ng increase in fuel consumption, etc?
    I'll try to ask him the brand of the liner. And yup the effect of a bigger displacement tatakaw sa gas but stronger hatak. Konti lang naman mga 0.5 to 1km diff.

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Help in Engine Overhaul (2007 Toyota Avanza G 1.5)