mild loss of acceleration :valve clearance kaya?

[brown_horn21]

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

[kinyo]

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

[brown_horn21]

hindi gumamit ng gage whatsoever. hinigpitan, tapos inalog-alog then higpit uli, yun na

[GBStJames]

Pa-tune up mo sa mahusay na mechanic. Dapat sinukat yung valve clearance at i-check yung timing. Top overahaul ba pinagawa mo?

[brown_horn21]

di naman top overhaul. valve seal replacement lang talaga.

[4JGtootsie]

May pushrod at rocker arm? Clearance should return to previous setting.
Yun lang ba ginawa sa engine mo?

[brown_horn21]

yup meron pushrod and rocker arm. valve seal lang palit, at dinukot lang daw kase di naman nagalaw ang timing.

[rion]

hindi ba talaga ma-avoid messing with the valve clearance when you change the valve seals?

[spyghost]

possible not to mess with them, but its better to check afterwards. it won't hurt double checking clearances

[4JGtootsie]

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.

[technismo]

sir baka wala sa valve timming yan...

[jeanpierre]

Anong car ba sya? Baka valve seat at hindi valve seal ang pinalitan. Kung valve seat pinalitan I think dapat recheck ang valve clearances. Usually sa engine bay cover may mga clearance specs na nakasulat for reference.

[rion]

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.

possible not to mess with them, but its better to check afterwards. it won't hurt double checking clearances

I see, it can be done and possible. but do most mechanics likely NOT to mess valve clearance? or almost all mechanics mess it? or do most mechanics knows how not to mess it?...

[spyghost]

proper valve clearance may be found here:
1 - under the hood sticker
2 - owner's manual
3 - factory service manual

not all clearances are the same even for the same make. it depends on the engine

[brown_horn21]

thanks po for all the replies. thinking the problem was valve clearance, i had it checked then adjusted to specs na nakalagay sa valve cover. But sadly, ganun pa rin, may loss of power pa rin on acceleration, mas maangil yung ingay galing tambutso upon stepping on gas at yung takbo parang hindi pino gaya ng dati? What could have possible been messed up in replacing valve seals so i can have it checked po?

[4JGtootsie]

thanks po for all the replies. thinking the problem was valve clearance, i had it checked then adjusted to specs na nakalagay sa valve cover. But sadly, ganun pa rin, may loss of power pa rin on acceleration, mas maangil yung ingay galing tambutso upon stepping on gas at yung takbo parang hindi pino gaya ng dati? What could have possible been messed up in replacing valve seals so i can have it checked po?

Its possible na hindi connected sa valve seal replacement ang problem.