I have had an on going issue for quite a while that I would like to finally resolve. I have bluish colored smoke that is coming from my exhaust once the air intake temps get above 130ish. This does not happen on cold days, or when the car is in motion being cooled. Only if in an idling state and intake temps climb. My injectors are 820cc / 1000cc, walbro 255 pump, and stock rails. I have moved the radiator backwards a bit and it is positioned vertically. The intercooler is directly in front of this. The issue only happens when the car heat soaks but my question is "what is the smoke that is appearing?". The AFR are around 12.9 at idle for the moment. I believe the intercooler is being heated by the radiator which is adding to the intake temps. Does anyone have any ideas what the smoke could be or what the heat soak is effecting to cause the smoke to start. I can take a video if needed.

*The same issue was present with my rtek 2.1 ecu. I have since rebuilt the engine and upgraded to a haltech, however, the smoking issue is still there.

Any help is greatly appreciated.

 

The blue smoke is oil being burned off in the exhaust. Your turbo is in need of a rebuild. While idling, the oil will build up in your exhaust as it passes by the turbine seal. Once you take off, the extra exhaust flow will push it out and make the smoke. Once at speed, the oil leak rate will probably diminish as the oil pressure creates more of a seal on the turbine shaft seal ring, and the exhaust flow will carry any burned oil out more quickly, thus showing less signs of leakage (although it's still happening on a much smaller scale).

Get a GPopShop T3 rebuild kit and replace the bearings and seals. Should be right at around $75 shipped.

 

I just rebuilt the thing... It also happened with my previous turbo. I wonder if the extra pull pressure could be the cause. I have a FD oil pressure regulator in it.

 

What do you have for crankcase ventilation?

 

The oil filler neck and center iron port are both open. Previously ran them both to a catch can and had the same issue. I was thinking of running one to a vacuum source.

 

Run a hose from before the turbo to the port on the fill neck. The other port I capped off. The rapid moving air in front of the turbo draws a vacuum and will draw out any crankcase pressure. Turbo smoking is caused by only a handful of problems. Incorrectly venting the cxrankcase, bad turbine seals, lacking the oil restrictor in the turbo (debatable), or an engine puking oil in to the turbo. Without that vacuum source, you're going to have a smoker in your engine bay.

Let's just hope Bumpstart doesn't catch wind of this thread

 

This may be a stupid question, but what is stopping the turbo from creating enough suction pull oil through that hose?

 

It will only pull vapors through the hose. There is some oil mist that gets in it, but not enough to damage anything. The oil is too far down in the pan for it to pull oil out.

 

I've run my car open pcv before and oil still burns. Remember this car runs very hot on exhaust and the turbine is old, I've been through rebuilds and hated it, always oil burning. Sometimes the housing is just not rebuildable. I almost got a full on rebuild, but bnr sent me new everything except an exhaust housing. I will see how it works soon