I already searched this forum and couldn't find answers.
I just finished installing my oil temp sender. I started my car and let it idle to verify the gauge was working. I already had the hood up when I noticed smoke coming from the turbo. I immediately shut the car off. It's coming from the turbo hotside where the bolts are. I let the engine cool off. I grabbed a wrench and to my suprise the bolts were not tight. I was only able to get to two of them. I started the car again and it still smoked not alot, but enough to notice. This is a rebuilt BNR stage 1 with about 10k on it. What should I do? Is my turbo bad already? Car drives great. No smoke out the exhaust.

 

There was just a stopic about this a week ago...

Basically, it will be either internal or external.

External leaks are easy to spot because you will see oil on the outside of the turbo. If it is external then you need to replace either the feed or return gasket.

If it is internal, the turbo is either being fed with too much oil pressure (I think the BNR units have an internal restrictor?) or has a bad seal. You can pull the downpipe off and check for oil or evidence of it to find an internal leak.

 

I pulled the exhasut the other day and there was no oil in the midpipe. I did see a lil' bit of seepage around the the middle part of the housing where the bolts are. That's why I tried tighted it. Is it hard to replace the return gasket? Where is it? How do I do this?

 

The return gasket is on the bottom of the turbo. See the FSM (FAQ) for info on removal and replacement.

 

Ok looked. Do I need to take the turno off to do this? How hard would it be?

 

to replace the feed line you dont have to remove it but to do the return line you do have to remove it....its pretty easy to take off the biggest pain is taking off the down pipe and draining the radiator...if i were you i would call brian at BNR and ask them about a oil feed line restrictor cause lots of times a rebuilder removes the stock internal restrictor and the turbo gets to much oil pressure wich causes the smokeing...this has been coverd many times here on the forum i dont know how to post a link so ill tell you to search (oil feed line restrictor) good luck

 

My turbo smoked, visible from the engine bay and the exhaust. the turbine seal was bad, I knew that before I put the turbo back in the car. it was a JDM turbo so that's prolly why it went bad, considering it sat on a self for a large number of years.

 

Well I used degreaser on the center housing to clean up any visible oil film. Went for a short drive. When I popped the hood. It was still smoking from under the center housing. I believe it to be where the return line is. Correct? The top is oil in, right? Bottom out? When the turbo cools down I will put my fingr under there to see if there is any oil residue/gunk.
I know this is off-topic. My new oil temp. gauge never got past 170 deg. under spirited drive around the neighborhood. Is this good? I thought 180 was normal.

 

Sounds correct. As the manual states, the return line is the thick pipe at the bottom.

 

Drove my 7even to work today. Popped the hood to check and see if any more smoke from turbo center housing and nothing. Went to get lunch. Checked again...no smoke.

 

Hello all.

Do this before we restrict the oil supply, vent the crank case with constant vacume. How you do this is run the 2 barbs (one, on center iron on the plug side at the top on the firewall side, and the other comes strait out on the oil filler neck) to the turbo inlet duct. If you have to add barb fittings there and run 2 seperate 1/4"-5/16" hoses to both vents. This will give you constant vacume to the crank case and allows the oil to work better throughout the engine and turbocharger.

The restrictor is removed b/c of contamination possiblities after media blasting. Media will stay in cracks and when it gets free it will contaminate the turbo and ruin it totally. That restrictor doesn't effect anything b/c the thrust supply holes are 3 times smaller than the restriction. Really not a point for it.

I put a stage 2 on my car and removed the restrictor. I have an FD oil pressure regulator installed so the OP is higher than normal. It smoked slightly after idling for a while. I did the ventilation job to the TID and problem solved.

Bryan@BNR
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