Where has all the engine oil gone?

[meg_omen]

not sure what's your hardware and ecu setup...
coz if lean tune, it will eat-up the engine oil due to the engine heat...:hmmmm:

probably it's time for you to put in temp gauge for your oil...

 

[me2kimi]

Hi all,

Yesterday, I just found out that when revv engine there is white smoke coming out from exhaust.
So what could be the culprit? piston ring or valve seal?

 

[achelone]

blue smoke = u burning engine oil
white smoke = u burning coolant
black smoke = fuel burn too rich

make sure what type of smoke u r having if emit from the exhaust. if your losing engine oil without any sign of leaking, it might be evaporate due to engine heat which solution is using heavier engine oil OR it sip into your water jacket / coolant line due to damaged head gasket. check your dipstick if your coolant become teh tarik.

if u having blue smoke, need to determined where was the engine oil leak. Do engine compression test to make sure piston chamber have good compression. if not your piston ring night be blown. the do the leakdown test to check your gasket (or is it valve) is in good condition. if your cold start have blue smoke, it your valve seal definitely.

white smoke meanwhile might be due to blown head gasket which coolant enter combustion chamber and burn it with the rest. it will leave a rubber goo at engine oil filler neck.

black smoke....check your AFR ratio

 

[me2kimi]

bro, how to differentiate between blue and white smoke?
the color is too similar.
Thus, there is only little white smoke coming out. I think hard to differentiate between blue and white smoke.
Better carry out compression test first.

 

[Captain Fast]

From what I hear, it's most likely your piston rings are fried...Do a top overhaul and change them and voila! No more eating oil! I had the same problem too previously...

 

[xtremeleo]

if the rings are fried, doing a top overhaul wudnt solve the problem sir

 

[pcmoddingmy]

Yes, you can change the piston rings whilst doing the top overhaul. Remove the oil pan, remove the conrod end caps and push out the piston with the head-off. While at it, replace the conrod bearing as well.

However, if the cylinder wall is scratched, its better to drop the entire block to bore/hone it. Strongly recommended to hone/polish the cylinder wall if possible as you do not need to install oversized pistons (more costly). Not many workshop will replace the piston rings while doing the top overhaul though.

On another note, compression might still be good with fried piston rings as only the oil ring could be fried while the compression ring could still be good (which could explain why your engine still has power).

Just my 2cents...