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  1. Join Date
    Jan 2009
    Posts
    5
    #1
    Last saturday po I had may valve seals replaced. Kase every morning pagstart sobra mausok, na nawawala naman pag mainit na makina. Nang mapalitan yung seals ok naman, nawala na yung mausok na start-up. What is noticeable though is the decrease in engine power. Di naman palyado yung makina pero noticeable mas mahina ang acceleration compared nung bago sya palitan ng valve seals. Tagal mag reach 80 kph even at 5th gear. Could it be improper valve clearance? Di na kase sinukat nung mekaniko yung tappet clearance nung ibalik yung valves, inalog alog nya lang bawat isa at sabi ok na raw yun, basta wala naman daw tukod. If di naman valve clearance, ano po kaya problema?
    Need your opinions tsikoteers!
    thanks po in advance

  2. Join Date
    Oct 2002
    Posts
    2,712
    #2
    Di na kase sinukat nung mekaniko yung tappet clearance nung ibalik yung valves, inalog alog nya lang bawat isa at sabi ok na raw yun
    ginamitan ng "feeling gauge"?

    dalhin mo sa ibang mekaniko na meron tamang tools sa pagsukat ng valve clearance

  3. Join Date
    Jan 2009
    Posts
    5
    #3
    hindi gumamit ng gage whatsoever. hinigpitan, tapos inalog-alog then higpit uli, yun na

  4. Join Date
    Nov 2008
    Posts
    148
    #4
    Pa-tune up mo sa mahusay na mechanic. Dapat sinukat yung valve clearance at i-check yung timing. Top overahaul ba pinagawa mo?

  5. Join Date
    Jan 2009
    Posts
    5
    #5
    di naman top overhaul. valve seal replacement lang talaga.

  6. Join Date
    Jan 2006
    Posts
    1,682
    #6
    May pushrod at rocker arm? Clearance should return to previous setting.
    Yun lang ba ginawa sa engine mo?

  7. Join Date
    Jan 2009
    Posts
    5
    #7
    yup meron pushrod and rocker arm. valve seal lang palit, at dinukot lang daw kase di naman nagalaw ang timing.

  8. Join Date
    Jan 2006
    Posts
    2,105
    #8
    hindi ba talaga ma-avoid messing with the valve clearance when you change the valve seals?

  9. Join Date
    Feb 2008
    Posts
    577
    #9
    possible not to mess with them, but its better to check afterwards. it won't hurt double checking clearances

  10. Join Date
    Jan 2006
    Posts
    1,682
    #10
    It can be done. You can check use the short method then insert the filler gauge on the closed valves then adjust those that are off (which is seldom and minimal deviation because of oil) then turn engine 360 degrees then do it again.

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mild loss of acceleration :valve clearance kaya?