changing valve seals

[jazcker]

mga sir, just wanna ask kung major ang pagpapalit ng valve seals? if so, ano-ano ang mga dapat isabay na sa pagpapalit nito?

thanks...

[fourtheboys96]

mejo major yang pagpalit ng valve seals kasi inaalis usually yung cylinder head to access the valves and seals.

pwede din sikwatin na lang yung valve seals without removing the head although mas complikado at not sure kung meron gumgawa niyan dito sa atin.

pag inalis yung cylinder head always inspect yung internal parts like the engine block, sleeve, valve guides, and the valves itself. replace all oil seals with new ones. also replace gaskets.

pwede mo na din isabay yung timing belt at tension bearing especially kung mejo matagal na ito or nearing replacement.

one thing i've learned kung papabuksan mo ang makina is to be ready with unexpected costs. usually merong unexpected sira inside the engine.

as always, go to ur trusted mechanic.

[jazcker]

thanks...

[speedyfix]

there is a tool to replace the valveseals without opening the head. you can text me if you want an estimate.

[puroy]

question, ano po ang symptoms pag kailangan nang palitan ang valve seal?

[fourtheboys96]

afaik, pag luwag na valve seals mo, may puting usok pag cold start then pag mainit na yung makina, mawawala yung usok kasi nag expand na yung seal dahil sa init. eto yung explanation sa akin dati.

[banawe]

question, ano po ang symptoms pag kailangan nang palitan ang valve seal?

usually pag maputi ang usok and parang palyado yung revolution ng makina mo ...

usually pag palit ng valve seal kasabay na yung cylinder head mo valve cover mo and usually mg oil seal mo ... more or less top overhaul yung car mo

kung tumirik na yung sasakyan mo ... complete overhaul and piston and liner ... and machine shop ... better to buy a surplus machine if the makina is beyond repair ...

BANAWE AUTO SUPPLY
regy

[vicvic]

question, ano po ang symptoms pag kailangan nang palitan ang valve seal?

Ang purpose ng valve seal is to control flow of oil through the valve guide.
Pag nagbabawas ka ng langis pero wala namang leak sa rings or other portions, malamang valve seals na to.

Pwedeng madali rin mag foul yung plugs mo.

meron namang valve spring compressors na hindi na kailangan tanggalin yung head.

Punta ka sa mga shops na merong overhead valve spring compressors.

[4JGtootsie]

Why do you think valve seal is the problem? Are you loosing oil above normal.

In case you will DIY, an air compressor will come handy in case the valve slips down. Good luc on your project.

[speedyfix]

replace only the valve seals pag di nagbabawas ng tubig/overheat. kung may overheat din then pull the head narin sabay.

[jazcker]

ganito po kasi...nun huli tune-up ko pinalitan ko lahat ng spark plug ko so bale bago lahat. then wala pa 2 months napundi yun isa tapos ilan araw lang yun isa pa uli. when i checked the plugs i think it's either oil fouling or carbon fouling. pero kung titingnan maige parang basa e...so most probably oil di ba? tapos sabi nung iba tungkol sa inquiries ko kung nu problema malamang nga daw valve seals.
saka sobra lakas ko sa gas. very drastic ang change sa consumption ko. from +120kms/12liters naging 60-80kms/12liters na lang!

[jazcker]

replace only the valve seals pag di nagbabawas ng tubig/overheat. kung may overheat din then pull the head narin sabay.

di naman nag-ooverheat sir...

[4JGtootsie]

Are you loosing oil faster than before?
Carbon deposits can also be caused by overfueling or even wrong ignition timing. Do an elimination process from the simplest(AF mixture) to the most costliest(top overhaul). Check your air filters and valve clearance also. I think the symptoms is more fuel related problem.

[fourtheboys96]

usually pag palit ng valve seal kasabay na yung cylinder head mo valve cover mo and usually mg oil seal mo ... more or less top overhaul yung car mo

BANAWE AUTO SUPPLY
regy

bro i think you mean cylinder head GASKET at valve cover GASKET. linawin ko lang baka kasi maumroblena yung nagtatanong considering the cost of a cylinder head.

[speedyfix]

normally valve seal failure will result in a smokey exhaust when revved. check it or have a competent shop take a look.

[jazcker]

Are you loosing oil faster than before?
Carbon deposits can also be caused by overfueling or even wrong ignition timing. Do an elimination process from the simplest(AF mixture) to the most costliest(top overhaul). Check your air filters and valve clearance also. I think the symptoms is more fuel related problem.

no problem with my oil sir. sobra lakas ko sa gas. sakapag bago start ang pangit ng tunog.

[jazcker]

normally valve seal failure will result in a smokey exhaust when revved. check it or have a competent shop take a look.

smokey sa kin sir pag umaga...saka ang pangit nga ng tunog...

[tangentph]

I think I have the same problem with jazcker. Kabibili ko lang din ng honda civic lx 94. I think 1 month old palang un. Consumption nya ay 6-7km/liter. Is this effecient enough for a civic?

Also, 1 time, I noticed na may white smoke na ini-emit ng car. Pero minsan wala naman. Pangit din tunog kapag kapapaandar mo palang. Pwede bang maging mas tahimik pa un. Although, ok naman ung sound niya, I just wish na mas tahimik pa. Possible ba un?

Medyo may vibrations din kapag idle e and when the aircon is on. Pero medyo lang. Possible bang maeliminate un? Are these all signs of valve seal problem? Worst case, how much would it cost me to have the valve seals fix?

Thanks..

[4JGtootsie]

Bad valve seals, valve guides and valve neck will lead to excessive oil consumption.
Thinning liners, piston rings and oil rings will lead to excessive blow by and oil consumption. May hatak pa rin pero it burns engine oil already and compression capability will diminish.

[jazcker]

Bad valve seals, valve guides and valve neck will lead to excessive oil consumption.
Thinning liners, piston rings and oil rings will lead to excessive blow by and oil consumption. May hatak pa rin pero it burns engine oil already and compression capability will diminish.

does this mean na kung di ka malakas sa langis ok ang valve seal mo? since magpa-change oil ako ok pa naman ang level ng oil ko. by the way, i had my car checked by the mechanic sabi ko malakas sa gas. saka sabi ko rin may oil sa spark plug. nilinis lang nila yun spark plug, ok pa naman daw yun ganun. then, nag-adjust sa timing. i think binabaan nila. from 10 deg ginawa yata 8 deg. obserbahan ko muna daw.