300zx TT High RPM smoke!!! HELP!!

[hanajin]

Hello everybody
My 300zx TT have a problem
I was driving highway, i shift down to 3 gear and drive high RPM over 7000RPM
And shift to 4th gear and i saw back mirror and see huge smoke looks white??
Whats going on? My motor get bad now??
Help me out please

[raremotive]

Weird. Last night I saw a decent red Z32 smoking up the highway. But he was puffing greyish smoke.

Rule of thumb is that: white smoke is usually caused by coolant water (or antifreeze) entering the combustion chamber; blue smoke is essentially due to oil (lubricants) getting in to the cylinder; and black smoke is generally because there is too much fuel (Diesel / Petrol) being inducted / injected in to the engine. And grey smoke would be due to a mixture of water and (excess) fuel entering in to the combustion chamber

If you sure it's white then you might be having some HG issues. I'd check/watch your coolant level and consistency of your oil. You can also run a lab check on your oil, this will tell you if you have anything unusual inside your oil. Like.. coolant in oil.. or excessive metal...it's kinda like a engine health check. Black Stone Labs is an example of a place that does a test.

[legion]

Honestly it's probably a piston ring. That's what happened with my old Z, revved too high and blew a ring. It looks white at first but I'm sure if you look closer it will have a blue tint to it, which means you're burning oil.

[300ZXttZMAN]

Moved to Z32 Tech.

[hanajin]

Coolant?

[mrmoose]

well check you oil and coolant levels, which ever is low is probably the one your losing... most likely oil, possibly your turbos with all the probs you have been having with them.

[hanajin]

thank you for the reply to me all of you guys!

today morning i checked coolant.( start motor open coolant cap, check if any bubble comes out, but no bubble) oil level is good.

just when it hit high RPM 7000 over huge smoke comes out and shift again smokes are gone.

also when i start car smell fuel and exhuast ? gas? somthing.

OH plus i have downpipes and no Cat converter. but i have mufflers.

motor isnt shaking anything motor sound smooth. no knock sound no tic sound.

maybe turbo gasket? or PCV valves? exhaust gaskets? fuel mixture ?

[mrmoose]

if it was fuel it would be more blackish i think, oil is gray to blue, coolant is white like a fog, basically what it is.... listen to these guys they know, i would bet on ring wear, valve stem seals or turbos...

where you located? im sure if you are near a fellow z enthusiast they wouldn't mind helping you...

[hanajin]

im in seattle, WA =(

theres Zsport shop in near by my house, they r charging $100hr test. and donno how many hrs. maybe 4-5 hr.
aw.. sucks..

[mrmoose]

make a vid and put it on the tube...

[t.mcginley.jr]

It's very plausible that its the piston/oil rings letting oil by. How many miles are on the car? or on the engine should I say. Over time, the rings wear down so the clearances aren't as tight as when the internals are all new. So while the rings may seal most of the time, at high rpms they might have worn enough to allow some oil by and then burns it up in the combustion chambers resulting in exhaust smoke.

Or your turbos could be leaking oil when they're spinning high at high rpms

[hanajin]

passanger side turbo : theres are small leak from turbo oil line.
maybe? cuz that?

[t.mcginley.jr]

a turbo oil line shouldn't cause smoke out of the exhaust, but a turbo a leaking turbo seal will