turbo smoke

[speed 3 mn]

i currently own a 2008 mazdaspeed 3 and i have had a complete turboxs tbe on for 20000 miles and never had a problem! but lately i have been noticing lots of smoke pouring out at every stop light of the exhaust pipe! i am looking to put the stock exhaust back on and get it in under warranty but i am missing the stock testpipe!! i am just curious to see if anyone would possibly sell me their test pipe or possibly mail it to me to get the work done and i would mail it right back after the work is done! thank you very much


nate
my email is Cash3803@aol.com

 

[MSMS3]

The "stock test pipe" is not a test pipe -- it is your second catalytic converter.

As to the smoking, please, please read the threads here on the subject before you go to all that is involved in removing your catless DP and putting the stock one back on.

Chances are VERY HIGH that this is not a problem with your KO4 turbo. It is related to the recirculation of unburned crankcase fumes and the drain back system from the oil line of your turbo back into the engine.

You'll go to all that work, the dealer will install a new turbo, and all along it was something else. You'll put your DP/RP back on and guess what? "Smoke" comes back and you'll think it is the turbo again.

Read the threads, please.

 

[speed 3 mn]

Turbo smoke

The of unburned crankcase fumes and the drain back system from the oil line of your turbo back into the engine.

You'll go to all that work, the dealer will install a new turbo, and all along it was something else. You'll put your DP/RP back on and guess what? "Smoke" comes back and you'll think it is the turbo again.

Read the threads, please.

Thank you for the advise much appreciated! What would your advice be on fixing this problem? Catch can?

 

[MSMS3]

Thank you for the advise much appreciated! What would your advice be on fixing this problem? Catch can?

Yes, right now a good catch can is the best solution. Read the other threads here on catch cans and on the turbo oil return line. There is good reason to believe that part, or even the major part of the problem is that the oil return line from the turbo back to the crankcase and the oil fittings on each end of that line are too small for our application. Running the amount of boost we do, that line, which is gravity flow, is fighting against positive crank case pressure.

On other forums for other brands of turbo cars with high boost we are seeing the same issues regardless of car make or turbo brand. It is beginning to be understood that replacing the line and the fittings on each end with significantly larger fittings and hose is dramatically reducing the "smoking."

And oil catch cans on high boost turbo engines are always a good thing.

I'm very interested in this "oil return line too small" concept and may experiment with increasing that oil line size. This is something which will require drilling and tapping for larger fittings for a larger hose and is not a minor mod. We have a shop where we can do this in-house. I just need to find the time.