smoke out of exhaust, but only sometimes

[ekafrawy]

I have noticed that after i push the car to its max boost of 13psi on stock turbo the let off, it smokes a little bit out the exhaust. This happens about 10 seconds or so after letting off the boost. The smoke is blueish in color, so i know its oil, but i dont know where it is comming from and why.

I pulled the outlet tube from the turbo and looked inside and didn't see any oil residue on the turbo outlet, but i did notice that the new vacuum lines i ran to the turbo, acctuator, and solenoid are starting to get oily for some reason. I just replaced the pcv valve and breather, but that did't help.

One thing to note is that the car has one of those little k&n filters that mounts to the breather. I'm starting to think the oil may be comming out of that, but not positive.

Any ideas on how i can pinpoint the problem?

 

[QUIP'6']

I have noticed that after i push the car to its max boost of 13psi on stock turbo the let off, it smokes a little bit out the exhaust. This happens about 10 seconds or so after letting off the boost. The smoke is blueish in color, so i know its oil, but i dont know where it is comming from and why.

I pulled the outlet tube from the turbo and looked inside and didn't see any oil residue on the turbo outlet, but i did notice that the new vacuum lines i ran to the turbo, acctuator, and solenoid are starting to get oily for some reason. I just replaced the pcv valve and breather, but that did't help.

One thing to note is that the car has one of those little k&n filters that mounts to the breather. I'm starting to think the oil may be comming out of that, but not positive.

Any ideas on how i can pinpoint the problem?

sounds like valve seals. decelleration is where you have the most vacuum and is probably drawing oil down the guides

 

[ekafrawy]

I hope thats it because i was going to do the springs anyway.

thanks

Eric

 

[Daniel Jost]

Do you have a catch can on your PCV? I had it happen with mine with smoking, PCV sucks in oil vapors, read a lot about it with other TB owners as well. check the throttle body for unusual oil residue in the throttle body. Just my $0.02, its worth a try.

,Dan

 

[ekafrawy]

no i donj't have a catch can. What does it do?

 

[Daniel Jost]

Catches any oil that may be entering the engine through the PCV to throttle body area.

,Dan

 

[ekafrawy]

has anyone had any luck with this.

Performance Systems Manufacturing, LLC
Performance Systems Manufacturing, LLC

 

[QUIP'6']

has anyone had any luck with this.

Performance Systems Manufacturing, LLC
Performance Systems Manufacturing, LLC

try these they are cheap and work great 3/8 for line before pcv and 1/4 for the other three factory valves
Liquid/Gas Check Valves - US Plastic Corporation

 

[stickybones]

has anyone had any luck with this.

Performance Systems Manufacturing, LLC
Performance Systems Manufacturing, LLC

I don't know if you changed the topic of your thread intentionally, but a check valve won't solve your oil sucking problem.

 

[ekafrawy]

Then what will?

 

[stickybones]

Two tips above may be places to start investigating.

1. Is the PCV sucking oil? If so, a catch can would help. This is good one that works. Accurate Machine Works Retail - PCV Catch Cans There's other cheaper ones out there, but I don't know how effective they are.

2. If the PCV isn't the problem, then the exhaust valve guides would be another place to look. That one isn't as easy to correct.