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  1. Join Date
    Oct 2006
    Posts
    32
    #1
    mga boss, any idea po kung paano proper na pagbalik ng cylinder head..kung may procedure po para safety salamat po..


    tia..

  2. Join Date
    Oct 2002
    Posts
    5,235
    #2
    safety?...hmmm. just be sure you don't drop it on your foot :D

    Yun mechanic ko uses gasket sealer though I think kahit wala nito ok lang. Tighten to the specified torque setting na nasa shop manual. Cross pattern (up-down, left-right, etc.). Be sure you tighten the bolts almost the the same time, unti-unti. Eto lang alam ko. Wait natin reply ng mga experts.

  3. Join Date
    May 2006
    Posts
    635
    #3
    sure me mga procedures yan to follow, your best guide is a service manual for that particular vehicle

  4. Join Date
    Oct 2006
    Posts
    32
    #4
    salamat po mga sir,
    *t2erns
    san po kaya pwede mag downlod para sa service manual?

  5. Join Date
    Oct 2002
    Posts
    10,812
    #5
    proper cylinder head bolts tightening sequence for a 4 cylinder engine is...

    8..4...1..5...9
    ( ) ( ) ( ) ( )
    7..3..2...6..10

    torque first to 10% of required torque in sequence 1-2-3-4-5-6-7-8-9-10 then torque it to the final torque, also in the same sequence. do the final torquing twice. so if you will notice parang pa-ikot ang bolt tightening sequence starting from the middle then going out. the reason why the center bolts are torqued first is to spread out the head. if you start from one side then the head will tend to twist.

    pwede din yung sabi ni afrasay na unti-unti ang torque setting. so instead na 10%-100%-100% you can do it in several steps like 10%-30%-50%-100%-100% of bolt torque. just make sure you do the 100% twice.

    for a 6-cylinder it will be ...

    12..8...4...1..5...9..13
    ..( ) ( ) ( ) ( ) ( ) ( )
    11..7..3...2...6..10..14
    Last edited by yebo; October 19th, 2006 at 07:48 PM. Reason: ang hirap i-set yung distance ng numbers sa gitna ng cylinders!

  6. Join Date
    Oct 2002
    Posts
    5,235
    #6
    ayun mas malinaw yun kay yebo ;)

  7. Join Date
    May 2006
    Posts
    635
    #7
    good points from sir yebo, to add there are those with torque to yield bolts that need head bolts replacements, there are also specified torque and procedure ; thus you need a service manual as your guide. depending on type of engine, you may find some in the internet.

    chek this site
    http://www.aera.org/docs/other/Torque3.pdf

  8. Join Date
    Sep 2006
    Posts
    389
    #8
    replace all the bolts coz you'll never know which is good and bad by just visual inspection.replace head gasket with mls gasket(if available on your car)make sure the deck is flat and straight.ONE word make sure your mechanic has TORQUE WRENCH.

  9. Join Date
    Oct 2006
    Posts
    32
    #9
    slamat po, ok talaga dito..yung mga piston po ba kahit san ang pwesto, ilalapat lang ba yung cylinder head? o may posisyon pa yung mga piston bago ikabit yung timing belt?

  10. Join Date
    Sep 2006
    Posts
    389
    #10
    Top dead center.

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cylinder head assembly