Overhaul or not?

**amats** · July 8th, 2005 08:46 AM

mga gurus, pice of advice naman dyan..
ung kotse ko kasi malakas na magbawas ng langis, tumatapon sa breather at sa pcv...its a 1990 lancer EL...so ang choice ko is to overhaul or change engine..may nagsasabi na maganda raw pag-overhaul kasi alam mo na bago ang mga nakakabit unlike sa surplus engine..the problem is pg overhaul kailangang mag-rebore then maglagay ng sleeves o liner, parang wala akong tiwala sa ganito...may nag offer kasi sa akin na palit makina, running yung makina nya gusto nyang mag-upgrade to higher engine..
heto nga pala mga gagawin o papalitan sa overhaul..
overhaul kit,piston rings,con rod bearing,main bearing..
machine shop, sleeves,grinding...

ano po ba mas maganda overhaul o palit na lang?

**johnart** · July 8th, 2005 10:09 AM

I just had my 1987 L300 gas engined overhauled. Haven't installed it in the van yet. Its still being body repaired. But I suggest you go for overhaul. At least you know the engine is good as new. Even if you have a change engine what assurance do you have that his engine has no problems yet ? I am assuming your friend has the same make and model. So more likely it is nearing to be overhauled also. Unless the engine is from a newer model you might need to make a lot of adjustments in the engine compartment. So its much better just to have your engine overhauled and bring it to a trustworthy and competent mechanic and machine shop

**the_wildthing** · July 8th, 2005 10:59 AM

Pag nag engine swap best is always to open the engine and check the internals. You'll never know unless you do this. Malay mo singaw na rin pala.

If it's cheaper to have the overhaul, go for it.

**amats** · July 8th, 2005 11:39 AM

wildthing,
bro,ang problem ko kasi sa overhaul eh yung machine shop process, they will rebore the engine block then force fit yung sleeve o liner..they have to rebore kasi may tama na yung butas..iniisip ko kasi na kapag nag-rebore then nag insert ng sleeve..magkaibang material yun hindi solid o buo...

johnart,
bro may reboring din bang ginawa sa engine mo or just parts replacements?

**xfreemanx** · July 28th, 2005 08:08 AM

Magkano ba inaabot ng overhaul? 1993 Corolla Gli kotse ko, lumakas na yung blowby lately at tumagas na sa gilid ang langis. Recommended ba ito?

Saan ba may reliable at affordable na shop para dito?

**yebo** · July 28th, 2005 11:10 AM

Originally Posted by amats

wildthing,
..iniisip ko kasi na kapag nag-rebore then nag insert ng sleeve..magkaibang material yun hindi solid o buo...

normal overhaul process lang yan, wala ka dapat ikatakot dyan.

overhaul kung ako tatanungin, UNLESS sobra na talaga dami tama ng engine mo (like warped block or cylinder head).

**jeegoogs** · July 28th, 2005 06:04 PM

suggestion lang.......pa baklas mo muna un makina mo then inspect the parts for wear.para ma estimate mo un damage.after that u can decide for engine replacement or O/H.

usualy light wear lang ang meron sa cylinder bores mo kung walang putol na piston rings.kung may putol expect mo some deep scratches sa bore surface ng engine.thats the time for reboring.kung wala naman,i suggest to renew both piston and rings para maganda and seal compression.pag piston rings lang papalitan mo,bale wala rin kc malaki na rin cgurado ang piston groove clearance ng engine mo at 15 yrs of service.

go for Gen overhaul nalang but use reliable parts.:-) :-)

**xfreemanx** · July 29th, 2005 03:51 AM

Just had a compression test completed on my engine. Ok naman pressure (160 psi max - 140 psi min).
Kaso, tingin ko malakas talaga ang blowby kasi lately, tumagas na yung langis sa may gilid so di ko muna ginagamit oto. Nabasa nga konti yun timing belt e.

Anyway, saan kaya nanggaling yung excess na pressure? Pag binuksan ko yung takip ng oil, malakas ang buga ng hangin (di usok) pero may tumitilamsik na oil. Tapos, sinubukan ko din paandarin na wala yung valve cover. Ayun, tilamsik nga ang oil galing sa magkabilang gilid (sa may gear near the timing belt at sa kabilang side ng engine). Normal ba to? candidate for overhaul na ba ako? HELP!

**jeegoogs** · July 29th, 2005 06:35 PM

kung ok naman comp pressure,baka sa oil seals lang yan.normal lang kasi un konting talsik ng langis sa oil filler cap pag naka overhead camshaft un engine mo dahil sa cam lubrication nito.para ma check mo kung blowby talaga,try to pull out the oil deepstick during engine idle kung malakas masyado un pressure,mausok at may kasamang langis.

kung ok lang,top overhaul lang ciguro kailangan.Valve seals malutong na and valves need lapping... kumakain na ng engine oil yan.:-)

**Pong** · July 29th, 2005 09:04 PM

Maybe you should start with a top overhaul first. Possibility din sa head ang problem. From there masisilip naman yung engine block kung may problema ang bores, piston rings, or pistons. Reboring and resleeving e normal overhaul process yan. As long as you get the services of a competent mechanic and machine shop. Huwag yung bara-bara kung gumawa. Dapat maingat at malinis magbuo ng makina. Just my two centavos!