blow-by????

**shadow** · January 29th, 2003 12:36 PM

how would I know kung ganito na makina ng kotse ko? what are the signs or symptoms? thank you

**HBOY** · January 29th, 2003 02:34 PM

while the engine is running open the oil cap of the engine... if you see smoke coming out of it.. chances are your engine is blow-by na...

**Ungas** · January 29th, 2003 02:47 PM

You could also check your radiator's water, if you notice that there is oil & water in it, possible internal oil leakage na yan. Another word for blowby.

**pajerokid** · January 29th, 2003 05:28 PM

if oil is rapidly consumed. Like let's say 1 liter every week.

**roydok** · January 30th, 2003 12:24 AM

Also pag mausok siya ng puti. It means oil is being burned.

yebo8 · January 30th, 2003 10:35 AM

white smoke may be water vapor/steam, especially in the early mornings or during the rainy season. if the smoke disappears some distance from the pipe then it may well be water vapor.

if there is still water vapor from the exhaust at midday, then it could be the cylinder head seals are damaged resulting to coolant water going into the cylinders, especially if the coolant level in your radiator needs topping up often.

gray smoke is burning oil. could be the result of blow-by (oil control rings already worn) or broken oil control rings or worn intake valve stem seals (oil flows down the intake valve stem into the cylinder). note that the color "gray" here means ANY SHADE OF GRAY, it could be anywhere from dirty white to almost black.

black smoke means the air/fuel mixture is too rich or faulty spark plugs (on a gas engine) or bad injectors (on a diesel). OR loose compression (another word for blow-by).

loose compression or blow-by simply means the piston rings are no longer doing their job of sealing between the piston and cylinder walls resulting to, you guessed it right, blow-by.

best way to tell a blow-by is to have your engine undergo a compression test. but before you do so, try this. while the engine is still COLD, open the oil filler cap and put your palm over it to close it. check for air pressure pushing up on your hand. if the pressure is too much, time to suspect a blow-by and have your engine compression tested.

**conzky** · February 3rd, 2003 01:29 PM

Tama lahat ung mga analysis nila.However, a white smoke coming out of your exhaust pipe does not necessarily mean loose compression or related problems.I've experienced the problem of white smoke coming out of my exhaust pipe, and oil consumption with my 92 lite ace.I let the cylinder compression checked, it was okey. It was found out that the valve seal were already not functioning, that's why oil is slipping to the cylinder and get burned during combustion, hence the white smoke.

I hope your problem is the valve seals.