Let say I have a V8 twinturbo -- In the morning start and idling, there is no smokes except the condensation smoke. After 15 minutes sitting and idling, one exhaust start smoking (oil smoke, I'm positive). The other exhaust is not smoking at all only the passenger side. The two exhaust are separate pipes - no balancer.

I took all the 8 sparkplug out and check for some trace of oil. They are completely dry. I check all the compression and they are all good with the range between 150 psi.

What do you think the issue?

 

the turbo would cause both banks of cylinders to smoke unless you had a divided intake manifold. If the rings were bad you would usually have some oil fouling on the sparkplugs. do a leakdown test to be sure but its probably valve seals

 

twin turbo - separate exhaust manifold - separate tail pipe.
I have a divided intake manifold --- Even if I have no separate intake manifold if the turbine seal is leaking - that will smoke directly to the exhaust.
Does not need to go to the combustion. The 8 sparkplugs are very dry no sign of oil --
...maybe the breather too? My crankcase breather also separate banks. Maybe I should look into this ??

Everything in this engine is separate. The engine is a flat plane crank engine (like a ferrari) not the traditional V8 cross plane crank.
Think of it--- like a two 4 cylinder engine welded together.

 

Im assuming this motor is in your s2000 as you have posted this, here. Pics for curiousity?

 

Different car - different engine.

 

im sorry, how is this, in any way, related to an S2000?

 

well valve seals would burn oil on start up and more than likely go away, so its not them

rings would be pretty much all the time, but it might be possible that it gets worse after it starts to throw more oil onto the cylinder walls

if it is for sure oil, there should be some type of build up or oil on the spark plugs. They wouldnt be clean

 

im sorry, how is this, in any way, related to an S2000?

Yeah I know im sorry....few people helps me here, I figured I can ask too. But don't worry I will delete the thread.

 

 

turbos can leak oil on both compressor and exhaust sides. In my experience the compressor side usually goes first which is why I asked. none of that matters though since everything is separate. what engine is it?

 

Thanks Disco --- I think I found the problem. This engine has no pcv valve. The ventilation hose is connected to the intake. When I pulled the hose, i noticed a few drops of oil. I removed and let it vent to the atmosphere for test and the smokes seems to stop. Perhaps I need a catch can to solve this problem. There are so many chinese catch can out there I hate to buy one.
It's a Lotus V8 twinturbo engine....thank you