car jumps and begins to smoke from under the hood

[gst fat]

well guys my somethings wrong with my car.I was driving at high speeds today on the highway when my car jumps and begins to smoke from under the hood,i know its in oil leak,but im not sure from where.Now the problem is my turbo only spools to like 3 or 4lbs. and then makes an ugly sound(very loud)and doesnt spool up anymore.the leak is coming somewhere from the turbo and manifold area,is my turbo going bad or is it just doing that ### of the oil leak,theres oil on the ground just below the turbo.What can be the problem,my exhaust shoots white smoke,my motor runs perfectly,its just when i spool up.so i dont wanna drive my car until the problem is solved, PLEASE HELP ME!!!!!!!!Its not the intercooler piping i alrrady checkd,my boy said it might be the oil return line.I have a 96 gs-t stock turbo,stock manifold

 

[absolute_DSM]

Sounds like you have a turbo problem. What kinda play is in the turbo now?

 

[RPM 10000]

You Might Want To Take The Intake Pipe Off The Turbo And Fill The Shaft If Is Moving In A Big Way. It Sounds Just Like What Happened To Mine, Smokes, Leaks Oil Etc

 

[Talesin]

I'd have to guess with absolute, sounds like you may have leaking, or possibly even blown turbo shaft seals. The stock MHI center spool is an oil/water unit, so you'd lose both into the intake and/or exhaust, much more noticeably when the unit spools up.

As RPM was saying, let the car cool down and remove your intake pipe and MAS. Then reach inside and grab the end of the turbo shaft, and see if you can wiggle it... back and forth, up and down, in and out. If it moves AT ALL, you have shaft play. The turbo should spin freely, so give it a whirl just to make sure.
If you have shaft play, you will eventually need to get your turbo rebuilt. Take an inspection mirror and check the inside of the compressor housing intake pipe (where you just reached inside) for any scoring, scratches, or other marks. Similarly look at the 'ends' of the compressor blades for any signs of damage. If there are no scratches, but you still have shaft play, you caught it in time and can just rebuild it. If the blades are damaged or the housing is scratched/scored up, it'd be better to just buy a new turbo.
Oh, and don't worry about the center 'nut' being filed away on one side, it's for balance purposes. Scared myself the first time I checked my turbo as I'd thought the nut had cracked.

 

[kenamond]

Side/side shaft play is okay unless it's hitting the housing. In/out should be none. Brand new turbos will have side/side but no in/out. And side/side is the same as up/down.

Sounds like a leaking turbo seal, though, which usually means warn bearings in the turbo.

 

[gst fat]

so if the shaft moves side to side or up and down,thats ok but if it comes in and out then i have a problem right?but where could that oil be coming from?i know its somewhere from the bottom.ill go check the turbo now

 

[Talesin]

Only a little bit. And yes, that's what I said above. If you have leaking turbo seals, you could be losing oil and/or water into the intake and/or exhaust. :b

And Ken, I had my B16G rebuilt, and it had zero shaft play once it was oil-primed. Not exactly 'new', but I thought it was solid before with about a millimeter of wiggle. Doesn't even have that now, spools faster, makes more power just from the butt-dyno.

 

[NavyP583]

i had a leak on my stock oil return line. the alluminum flex was cracked so it would only leak when there was oil pressure. just an idea

 

[gst fat]

So i checked the turbine and its just fine,it spins just fine no messed up fins,and theres no shaft play,maybe a millimeter or less it moves around,but my hands came out very black,theres oil all over the place.

 

[speedy13]

I thought about posting that too, but then he wouldn't have smoke coming out of the exhaust, it would just be burning by the turbo/manifold area.Without looking at it, I'd have to agree with tailsin and mr.rpm. If you need a expirienced mechanic in dsm's hit gary up at speed injected. He knows his dsms. I used to live in Miami and have been to his shop for a couple dyno days and such. If not I'll be back in MIA next month as I'm moving back and would more then happy to look at it for you. good luck with it.

http://www.speedinjected.com/

 

[2point3Tsi]

for the love of god let go of the shift button

You Might Want To Take The Intake Pipe Off The Turbo And Fill The Shaft If Is Moving In A Big Way. It Sounds Just Like What Happened To Mine, Smokes, Leaks Oil Etc

 

[gst fat]

so if its not the turbo,then what can it be?can it be thr oil return line?

 

[Talesin]

Still could be the turbo, just says that the turbo isn't particularly bad.

Stupidity check... you HAVE done a proper boost leak test, not just looked at the IC piping, right? If it were my car, the next thing I'd check after a boost leak test would be the wastegate actuator.

Your BOV *is* recirculated, right? Just checking, as if a boost leak test came back okay, but your BOV diaphragm were blown, and you were atmo-venting, you'd get a really bad-ass boost leak from that. I'd check that for proper actuation right after the WG actuator.

Says you have a boost gauge in your profile... aftermarket, right? Not the stock POS in the cluster? Did you check and make sure that the lines on that were tight? Could be a problem if THAT line were leaking, especially if you were teed into the FPR vac, like many seem to do.

 

[gst fat]

N my BOV is greddy type s open,and injen intake

 

[kenamond]

A bad PCV valve will lead to pressurization of the crankcase and valve cover which can cause excess oil to blow out the VC breather and into your intake pipe. That might explain the oil on your compressor wheel. Check your intake pipe for oil. If it doesn't have enough to explain the oily compressor wheel, you may still have a leaking compressor seal. It can leak even if the bearings are fine (it's just a big o-ring).

Do a real boost leak test. Pressurize to 5psi above the boost you are running and see how slowly it leaks back down. If it's leaking more than 1psi per second, then you have more leaks to fix. A tight system will leak down slower than 1psi every several seconds, just to give you an idea.

Keep us posted on how this goes, but make sure you do a real boost leak test.

 

[Talesin]

Get your BOV recirculated. As I said, if the diaphragm is damaged or for any reason it's opening under boost, you'll have a MAJOR boost leak from it.
Similarly, no matter WHAT some 2Gers will tell you, you WILL lose power venting your BOV. It's a newbie mistake to get the Riced & Curious hiss.

 

[gst fat]

but thats how the intake is,its the injen one,i know it has to be a seal,if it is a seal is it possible that my turbo is still good,its not a boost leak,### my turbo doesnt spool up right,it wont pass 3 or 4 psi

 

[kenamond]

but thats how the intake is,its the injen one,i know it has to be a seal,if it is a seal is it possible that my turbo is still good,its not a boost leak,### my turbo doesnt spool up right,it wont pass 3 or 4 psi

But you're still burning oil under boost. That's probably from the turbo. Have you checked the compressor outlet (lower intercooler pipe) for oil? A leaking BOV diaphragm will not cause you to burn oil. And you don't know if you have boost leaks unless you do a boost leak test. The fact that you have oil on your compressor wheel hints that you have oil leaking out your compressor seal. Oil in the LICP will tell you this if you'd just do it. So just do it.

 

[Talesin]

Just because they sold you a pipe without the recirculation fitting on it doesn't mean that it's the right way to do it. Listen to kenamond, then do a boost leak test. If your BOV is leaking badly under boost, YOU WILL NOT BE ABLE TO BUILD BOOST. And since it's atmo-vented, you'll also run painfully rich and probably bog out the car, along with blowing black smoke out the back at best, or break something in the engine at worst. The turbo will also overspin uncontrolled (causing the turbo to eat itself) if you're teed off the BOV vac line, up until fuel cut.

 

[RPM 10000]

for the love of god let go of the shift button

Thats The Way My Computer Types, Didn't Think It Was That Big Off A Deal, I Dont Know How To Turn It Off!!!!