i mean turbo blow-by. when a turbo shaft is floating on a thin layer of oil (ie. journal/floating bearing) then seals inside the turbo maintain pressure on the shaft and the housing not allowing oil to leak by. but when you have a turbo that is spinning at 40,000+ rpm the shaft will tend to move side to side against those seals and wear them. over time, the shaft will have side to side play and oil seepage is expected and quite normal. the reason you don't see smoke at that time is because the cat converter is catching most of it and the hot exhaust is burning off the extra. so now you have a couple problems.
a leaking/blown turbo causing oil to blow by into the ic tubes and through the bov into the turbo inlet again and oil blowing by into the exhaust causing you to clog your cat down the line.
only one thing to prevent this is to cool down the car BEFORE turning it OFF. TURBO TIMERS are very important to these cars because they run so f***ing HOT. if you don't have a timer then after any driving, just let the car idle for 2 minutes. that simple...
this will help bring coolant temp down to normal and in turn bring the oil temp down. then the turbo will have that small amount of cooled oil in the bearing and when you start it the next time, the turbo will not have a dry start and wear the bearings and seals.
ALSO don't start the car and then just take off like a bat out of hell. let the temps rise a little before driving, for the same reasons above.
i hope i helped a little.
a leaking/blown turbo causing oil to blow by into the ic tubes and through the bov into the turbo inlet again and oil blowing by into the exhaust causing you to clog your cat down the line.
only one thing to prevent this is to cool down the car BEFORE turning it OFF. TURBO TIMERS are very important to these cars because they run so f***ing HOT. if you don't have a timer then after any driving, just let the car idle for 2 minutes. that simple...
this will help bring coolant temp down to normal and in turn bring the oil temp down. then the turbo will have that small amount of cooled oil in the bearing and when you start it the next time, the turbo will not have a dry start and wear the bearings and seals.
ALSO don't start the car and then just take off like a bat out of hell. let the temps rise a little before driving, for the same reasons above.
i hope i helped a little.
