Blow by!!!

[rolla89]

Nwebie here. just bought a corolla gl 1.6 ae92 90 mdl from a friend. when i showed it to another friend he opened the engine oil cap while the engine is running and pressed his palm over the oil inlet mouth to test daw if the engine is still good. sad to say, droplets of oil manifested in his palm and he said the engine is having a "blow by" at hindi na daw magtatagal. how is this true mga guru eh maganda at pino pa naman manakbo ang oto. dapat daw hindo tumatalsik ang langis pag binuksan ang bibig ng makina....request advice here. thank you sirs...

[niky]

Oil will naturally come up... what you need to see is how strong it is... if there's pressure under the cap, that means air from the cylinder is entering the oil system... which indicates blow-by.

A more accurate test would be a compression or leakdown test to assess how well sealed your piston rings still are.

[emms1121]

Tama si Nicky. Oil will naturally come out specially for that model. Meron din ako ganyan sasakyan before. Bago ko binili may kasama akong mekaniko at binuksan din nya oil cap habang tumatakbo. Tumalsik langis. Ang dapat daw tingnan ay kung may usok lumalabas sa oil cap.

[boy_tino]

para mas madali kung blow by na hugutin mo ang dipstick mo kung kapapatay pa lang ng makina mo or umaandar, sa suksukan ng dipstick kapag may lumalabas na usok dun asahan mo na yun at lalo na yun mismong dipstick mo ay may moist na at i check mo na rin PCV valve mo kung malangis at mausok na rin ito.


pero ang pinaka sigurado sa lahat ay compression test kasi dun masusukat kung gaano kalakas ang compression ng combustion chamber ng makina mo

[rolla89]

Thanks for the infos sirs...subukan ko tingnan yung sa dipstick kung mausok sya pero sa oil cap hindi naman sya mausok pero malakas talagatalsik ng langis as in kung takpan mo syan ng palm mo e mababasa eto sa langis. ill try aslo the comp test thing. hope hindi malala sakit nya. eh kung blow by nga talaga sakit nya mga magkano kaya magastos ko sa pa repair? ibaba ba ang engine nun? thanks again for the feedbacks sirs...by the way taga tarlac pala ako...

[bambino]

pwede rin i test yan through battery readings ,called electronic relative compression test . and it only takes a few minutes to assess the engine mechanical.

[electricx]

I agree. And another signs of loose compression if U're not a professional mechanic, the idling of the vehicle is ERATIC. Meaning, sometimes normal afterwards low or high. Next is the tail pipe of the vehicle, a white smoke is coming out. The ERATIC idling of the vehicle is very noticeable when U switch on the airconditioning unit of your vehicle. To the extent the engine will die down. Furthermore, use also vacuum tester. Said tester will also help U and confirm the condition of ur vehicle.

[white hotrod]

for info lang po,hindi blow by ang tumatalsik na oil sa oil cap ng ae92.there is a worm gear located underneath that cap kaya natural na tatalsik oil kapag binuksan.hindi pro na mechanic yang nagsasabi ng ganyan.sa dip stick test pag me tumalsik na oil un ang blow by since gas engines are low compression engines.

-experienced toyota engine tuner,10 yrs-