New GT28R smoking need opinion on situation.

[MegasquirtCA]

Alright guys maybe I can get definite answer from you guys. I have a GT28R S15 has 774 Miles purchased brand new a little under a year ago.

about 3 weeks ago I was on my way to work when I come to a light when I noticed a little bit of whitish/bluish smoke from exhaust. I get worried so I head home trying to diagnose whats wrong unfortunatly didn't have time. At first I didn't suspect the turbo search results yielded possible Valve seals.

After that day I only drove the car 3 times that week for roughly a total of 25 miles, each time it kept getting worse and worse to the point where I blanket 4 lane intersections, did a compression test and yielded 160 across the board, spark plugs show no signs of oil contact. Than I noticed my red air filter turned black, removed it it was soaked with oil, their was oil in the compressor inlet and compressor outlet, my bov also was dripping tiny bit of oil. Also my muffler has some oil residue on the inside of the tip.

Now heres the thing the car runs like a dream, turbo still boosts hard and boost starts building 2200rpms full boost by 2700rpms before the problem ever started and still does, no weird noises, ABSOLUTLY NO SHAFT PLAY. Practically the only thing wrong is the smoke and puddles of oil in the compressor housing.

I have all SS Lines no leaks outside the turbo. After reading some more it turns out the problem is most likely from the oil drain, upon further inspection I noticed a kink in the oil return (stupid rubber hoses) so I ordered a bunch of stuff for the oil drain and a stronger silicone hose.

My question is do you guys think my turbo will be ok once I fix the oil drain situation and clean out the intercooler and piping?

this sucks cause its a brand new turbo unfortunatly I cant send for a warranty as it was purchased from Nissan Japan.

I'm also running Megasquirt so no MAF, air filter was on compressor so thus why it had a bunch of oil.

[PS13SILVIA]

Is the CHRA clocked correctly so that the oil drain is parrallel to the deck? If not this could be your problem...

[MegasquirtCA]

Yes sir;

I originally had it on my stock manifold with stock lines, drove it that way for 700 miles. Than when I got my SS lines made, I installed new manifold, installed exhaust. A week after installing the new stuff is when the problem occured, I used a new rubber hose for the return but its possible that I may have cut it to long which allowed the kink to occur and possibly making oil back up into the center housing.

[MadScientist]

Originally Posted by MegasquirtCA

Now heres the thing the car runs like a dream, turbo still boosts hard and boost starts building 2200rpms full boost by 2700rpms before the problem ever started and still does, no weird noises, ABSOLUTLY NO SHAFT PLAY. Practically the only thing wrong is the smoke and puddles of oil in the compressor housing.

Blind guess... but this ^^^ makes be believe the turbos internal gaskets that seperate the Compresor & Turbine from the Shaft & Bearing Body (Cartridge) has blown allowing Oil to be dispersed through the piping and your BOV would have shot Oil out onto the Intake and other engine parts.

Black or Blue smoke usually mean Engine problems not Turbo, but this seem Turbo related.

Wow first time I have heard of an actuall turbo housing gasket go out... but it fits. Contact Garrett USA for a Service Kit in the specs you need... or contact Turbo International.

Peace
Drew

[johngriff]

How would any one know if it is ok? You will have to fix the problem and see for yourself.

Obviously if you are creating too much pressure in the drain, you can blow the seals out.

[PS13SILVIA]

Originally Posted by johngriff

How would any one know if it is ok? You will have to fix the problem and see for yourself.

Obviously if you are creating too much pressure in the drain, you can blow the seals out.

Ok I always hear the term used you can blow your seals out if oil backs up in the CHRA, this is tottally false.........your seals will be fine after you correct the problem that made your oil level rise to high in the CHRA in teh first place..........turbos used what is called a piston ring seal pretty much the same thing used on a cars engine piston to control oil..........when turbos are put together the piston ring seal is positioned so that the ring gap end is facing 12 oclock as this allows for the most highest level possibly to avoid oil leaking into the compressor and turbine housing, it cannot physically just blow out of place...however is you do clock the CHRA incorrectly you move the position of the ring end gap to a more unfavorable position that would allow for less rise before oil enter the ring end gap....

[MegasquirtCA]

real good info PS13SILVIA.

[PS13SILVIA]

I've also heard that oil mist/vapor being discharged by the compressor outlet is very bad becasue it effectively lowers the octane rating of your fuel and you will be more prone to detonation incase you didn't know that...well actually I guess it lowers the oxygen content that makes you more prone to detonation....

[liv2drift045]

oil drain is the first thing that came to my mind... i sold a s15 t28 to a guy on here and he mailed me saying the same thing happend... i was pretty pissed because i knew there was nothing wrong with the turbo.... he fixed the kink and now all is well... i hope everything works out for ya

[initial_drifter]

sorry for a noob question, but what is CHRA?

[PS13SILVIA]

Originally Posted by initial_drifter

sorry for a noob question, but what is CHRA?

It stand for Center Housing Rotating Assembly

Its this part:






Upper right corner in this pic

[wootwoot]

I would measure the pressure going to the turbo from the oil feed as well. BB turbos dont need much pressure. If you had a kink in the oil drain, that was it.

[idiot goes sideways]

did you install a "aftermarket" oil restrictor/reducer on this turbo? no? then you already blown the inner oil seals of the turbo
the stock s15 silvia turbo has no oil restrictor/reducer on board, its in the oil feed line of an s15, so if you dont run the s15 oil feed line and no aftermarket reducer, your turbo was running way too much oil and oilpressure

[DrIvEsldEwAyS]

i put my s15 t18 on with taka lines, will that cause the same problem? ive got like 2-3k miles on mine and it doesnt seem to be smoking any

[MegasquirtCA]

Originally Posted by idiot goes sideways

did you install a "aftermarket" oil restrictor/reducer on this turbo? no? then you already blown the inner oil seals of the turbo
the stock s15 silvia turbo has no oil restrictor/reducer on board, its in the oil feed line of an s15, so if you dont run the s15 oil feed line and no aftermarket reducer, your turbo was running way too much oil and oilpressure

I'm using the ATP GT oil restrictor I believe its the 0.035" its a tiny ass hole.


Thanks for the responses guys once my supplies from ATP arrive I'll definatly post up my results.

[kawika219]

Originally Posted by PS13SILVIA

I've also heard that oil mist/vapor being discharged by the compressor outlet is very bad becasue it effectively lowers the octane rating of your fuel and you will be more prone to detonation incase you didn't know that...well actually I guess it lowers the oxygen content that makes you more prone to detonation....

would this cause you to lean out??? because i have a little oil coming out of my exhaust (assuming bad turbo seals), and sometimes when i push the car it goes lean (i usually run rich)

[steve shadows]

Originally Posted by kawika219

would this cause you to lean out??? because i have a little oil coming out of my exhaust (assuming bad turbo seals), and sometimes when i push the car it goes lean (i usually run rich)

[bik]

I kinda have a problem like that... i got my SR20 and was checking the condition of the turbo and when i take off the elbow pipe thing bolted in the turbo notice had some oil there... enougth to start leaking... i know the engine had some oil inside yet when they send it... but people told me is ok, the oil got there cause the trasportation... also on some point the guy than help me to trasport the engine put it on aside.... anyone know if is posible to get oil in there for the trasportation? or my turbo is just broken? >_<

btw beside that the turbo looks fine... it spins freely an the inside dont move side to side O_o

ps. yeah my english sucks O_o

oh... and tried to serch for the serch dont work for me a lot =/ most of the time get a blank page O_o