Gtr Blowing Smoke - Help Troubleshoot

[Booki]

Hey all,

This started happening yesterday morning, but was hard to diagnose due to lots of condensation (was a bit chilly yesterday morning). Basically what happened, is when i would drive off, then stop, smoke would come out. And when i accelerate then back off. Smoke would come out again. Doesn't look like it comes out while actually accelerating, only in between. (if that makes sense?)

After work, i got the old man to follow me around, he said only a small puff came out when i left my house then nothing but a bit of blackish/grey smoke under boost (normal i believe with a stock ECU). Did a few tests, light load - high/low revs, 4th under load up hill and WOT. small cloud of smoke under boost. Werid...

Anyway, while i was driving today i noticed quite a alarming rate of smoke coming from my exhaust, i pulled in and took this video.

https://dl.dropbox.c...1009_082732.mp4

It won't smoke when it is idling, but when accelerating it puffs out like crazy, the car was warm when the video was taking. It seems worse when the engine is cold. Looks like a bluey smoke, so im thinking oil??

Tips on how to diagnose whats wrong with my car appreciated!

Temps seem fine, Still goes the same (not that i gave it a hard time due to the smoke screen).

Hoping its turbo related because i am replacing them. I'm scared to drive on it, and you know have this lame thing called work, really don't want my engine to go BOOM

Edited October 8, 2012 by Booki

[The Dan]

Looks like condensation. Chilly morning = condensation, especially if you don't drive the car very much.

Take the car for a long drive and see if it still does it when the weather is warm (read - above 20deg c)

[Hadouken]

check to see if there is oil in your coolant.

but it is more than likely a turbo seal

[Booki]

Looks like condensation. Chilly morning = condensation, especially if you don't drive the car very much.

Take the car for a long drive and see if it still does it when the weather is warm (read - above 20deg c)

I thought it was condensation too, But I dunno. It seemed a little "blue" and heavy for condensation.

I will take another vid when I move to my next job site.

Hado - I checked my coolant last night, looked normal green color. Will check it before i drive off again.

[vorse]

if its oil yule smell it

[Booki]

Ok, Started it up to go drop it at home.

No smoke...Revved it a little, no smoke. Wasn't even worth taking a video.

Even on the drive home, nothing came out.

Decided to play it safe, and drop the car off at home. Gave it a bit of a rev when i got in the garage and a small puff came out, but then nothing after wards.

Beats me... It was BAD this morning. Now, nothing. Regardless using the bike till i figure out wtf is going on.

and Hado - Coolant levels normal, still green.

[Booki]

Update: checked coolant. Its used some, although it is still clean of what i can see of it. Checked oil cap, and all looks good from that view, as well dipstick oil. Color looks normal. So i don't think its a head gasket (least im hoping not)

Stock turbos

Edited October 9, 2012 by Booki

[toffy]

Sounds like a turbo seal starting to go , get the car to operating temp , then drive down a steep ish hill , report back if it blows a tonne of smoke

[ACTIVE-LSD]

white smoke on rb26 usually means turbo seals. have a look in the coolant reservoir tank. can you smell oil? incorrect anti-freeze ratio can also cause white puffs of smoke. do full coolant flush from block and see how it goes from there. my gtr does it on WOT. no biggie.

[Booki]

Starting to replace my turbo's, and noticed the rear one was seeping oil.

Intercooler also had some oil in it too.

So far have all the piping off, turbo heat sheilds off, undone the front pipe bolts to the dumps.

It's coming along alright so far, only because the old man is helping out (by helping out i mean doing 90% of it).

Hopefully we don't get stuck, the job itself doesn't seem hard. Its just all the variables (rusted nuts/bolts, tight space) that make it difficult.

Dam RB26

[The Dan]

Cam cover breathers go straight into the intake above the rear turbo. That's where the oil comes from.

[Booki]

Ok....Started up the GTR with BRAND NEW -7 turbo's, let it idle for a bit while i was putting in my fresh coolant (you know the drill) and the same shitty smoke was there.

No where near as bad as the video posted up, but still noticeable.

Idea's?

[The Dan]

Valve stem seals

Does it get smoky every time you let it sit for a few mins and then rev it?

[Booki]

Hard to tell, Only started it twice.

Turbo's have only just been put on, have not driven car due to it not being tuned.

The smoke is hard to describe, it looks like condensation but right now its about 22 degrees? So i don't think its condensation.

Smoke comes out on de-acceleration.

Only revved it as high as 2500-3000rpm

[Booki]

Random thought.

Could it be my PCV valve?

Running it how ever they come stock, not running a catch can.

Edited October 29, 2012 by Booki

[The Dan]

Random thought.

Could it be my PCV valve?

Running it how ever they come stock, not running a catch can.

Yes but not likely

[Booki]

Is it easy to inspect a PCV valve?

Take it you just remove the hose and have a look?

A way to test if its stuffed?

[DVS JEZ]

I have a similar issue with a customers car. I tried a new pcv Valve to eliminate it from the diagnosis and the issue is still there.

As Dan has said, more than likely valve stem seals.

They are a pain to diagnose tho.

Have u done comp and leakdown test?

[Booki]

Havnt done compression or leak down tests yet. Will do some more trouble shooting when I finish up work for the day. Hoping its not a head gasket or rebuild time, only put 5000kms on it since ownership

Will try and get a video up, keep me posted on how you go with your customers car

Edited October 29, 2012 by Booki

[Booki]

Currently fearing the worst.

Fresh oil I believe shouldn't look like this?

Uploading some video's as well

https://dl.dropbox.com/u/44382490/GTR%20smoke/VID_20121031_174524.mp4

https://dl.dropbox.com/u/44382490/GTR%20smoke/VID_20121030_173245.mp4

https://dl.dropbox.com/u/44382490/GTR%20smoke/VID_20121030_173026.mp4

Edited October 31, 2012 by Booki