I have recently swapped in a speed tech single turbo kit for my N54 motor. My car was showing signs of blown turbos (high amounts of smoke out of the exhaust). I have since changed the turbos hoping the problem would be resolved. It is not... I was hoping if someone with lots of experienence can confirm my suspicion.
The new turbo is in and the old turbos had excessive shaft play. The motor is still smoking under boost and especially under decel. My suspicion is valve seals. Here is a link which shows exhaust port 3 and 2 covered in oil/carbon. The spark plug in 3 is also very oily on the tip causing a misfire. Can anyone offer input to this? How difficult is it to replace valve seals?
Could this be a PCV issue? I have the FTP metal PCV and I have routed the PCV to the turbo inlet speedtech provides. I have capped the hard plastic vacuum lines which were used to control the boost for the twins. Would a crank case breather help or is this really too far advanced to where seals are definitly needed?
I also have brand a new valve cover and gasket as well as new index 12s. To offer further clarification I had to also remove my Oil catch can because water froze through all the lines and caused a really really REALLY bad smoking condition Im talking a quart in 5 miles could this have cause the valve seals to fail prematurely? I am at 72K miles.
Finally this is a bit more techincal but why does decel create a smoking condition? Does this increase crankcase pressure to cause the oil to blow through the seals? Whats the science behind it.
Thanks guys.
The new turbo is in and the old turbos had excessive shaft play. The motor is still smoking under boost and especially under decel. My suspicion is valve seals. Here is a link which shows exhaust port 3 and 2 covered in oil/carbon. The spark plug in 3 is also very oily on the tip causing a misfire. Can anyone offer input to this? How difficult is it to replace valve seals?
Could this be a PCV issue? I have the FTP metal PCV and I have routed the PCV to the turbo inlet speedtech provides. I have capped the hard plastic vacuum lines which were used to control the boost for the twins. Would a crank case breather help or is this really too far advanced to where seals are definitly needed?
I also have brand a new valve cover and gasket as well as new index 12s. To offer further clarification I had to also remove my Oil catch can because water froze through all the lines and caused a really really REALLY bad smoking condition Im talking a quart in 5 miles could this have cause the valve seals to fail prematurely? I am at 72K miles.
Finally this is a bit more techincal but why does decel create a smoking condition? Does this increase crankcase pressure to cause the oil to blow through the seals? Whats the science behind it.
Thanks guys.