thanks, i just have to find the problem now i dont know where the smoke is coming from is there a way to test the turbos?
old pcv's can cause excessive oil to pass through the exhaust ending up coating the exhaust with a oil ressidue that will smoke everytime u run the car even if u fix your oil problems !!! just something 2 think about
even if you change the pcv's? how would you make it stop smoking? pull the exhaust and clean them out? there it is no x or h pipes they run completely seperate
The reason pcv's cause smoke is a correctly operating pcv will allow a vacuum in the crankcase when the intake is in negative pressure. This negative is also present in the crankcase as the pcv's are open. This negative pressure helps the turbo's evacuate oil (amoung other things) without relying on gravity alone. Under positive intake pressure, The valves are forced closed to stop the crankcase being pressurised and oil blowing past the rings and valve stem into the combustion chambers. If the vlaves do not seal closed, excess positive pressure will be allowed to pass into the crankcase, forcing oil past the rings. When the valves are closed, the crankcase pressure that is built up is allowed to vent through the cam cover breathers and into the accordian pipes. A merge pipe can help cover up worn turbo's. The only way to get the oil out of the exhaust is to get it hot and burn it out, some sprited driving will do this. There is no way to test the turbos to see if they are passing oil. The only way is a visual inspection, you can tell by removing the dump and inspecting the oil spray pattern in the turbine, but you need to know how to differentiate between oil coming from the cylinders or oil coming through the turbine seal.
What does that "covering up" mean? I've got this siren sound under my passenger side foot well. We're suspecting a "not properly sealing wastegate" on that side. Would this merge pipe help in any way? I've got my exhaust system changed just recently. They are two totally separate mufflers also. Thanks in advance for any help offered... Arvin
By covering up I mean it won't fix a worn turbo seal, but it may stop the smoke, however at sometime in the near future you will still need to repair the turbos. A siren sound is unlikely to be a waste gate, more likely a damaged impeller.
My exhaust smoked when my exhaust didn't have a merge pipe, when I pulled the turbos to install my 600r kit, they weren't leaking however there was lots of oil stain coming from where the pcvs dump in. You may aswell get it done, shouldn't cost you anymore then $150 for an xpipe.
When i bought mine it didn't have a H pipe. It smoked so much i was told it needed turbo rebuilds. Thanks to a reply to my question on this forum i went to the exhaust shop to get new mufflers and told the bloke to fit a H pipe . He told me it wouldn't work but he would do it for $30 if i insisted. Best $30 i ever spent on the Z. Give it a go you have nothing to loose. Dave
