somking problem

[240sxr33]

it started to happen 1 month after i put a turbo on my car ka24det.Ok so here is the deal every time i come to a stop after few second the car sturts to smoke the smoke goes away after i starts driving do anyone ca help me

thanks for help

[daniel240]

hmm, are you sure its just one you stop, and not while your driving, because it is harder to tell while your driving if your smoking or not.

[tony/ka24de]

I am having the same problem. What size is yoiur oil feed line? I am trying to solve this problem. I think that the turbo seals are a little worn and might be leaking oil into the intake because this usually happens after coming to an idle for a bit. Idle oil pressure is about 28psi I hear, and at full throttle the psi doubles. So i think because the oil seals might be a little worn, at full throttle some oil might leak the the seals. I am going to try resricting the oil feeds flow a bit to see if it helps. I am still not 100% sure that is the problem, but I'm trying to figure it out. Please let me know if you figure the problem out. Do you have the breather line coming out of your valve cover connected to your intake? Please email me at [email protected]

[Structure240sx]

fellas do a compression test. for your turbo to be smoking the seals would have to be gone. believe me i wne through this last month. you probably have some cracked ring lands

[C-Kwik]

I spoke to him on AIM. I suspect his exhaust valve stem seals. His turbo is relatively new and has no shaft play. From his description, he likely has a -4AN or -3AN feed line and a 3/4" drain. The turbo ran a month with no problems. No Oil on the spark plugs. Smoke is white in color and does not smell like coolant. This tells me it's not burning oil, but evaporating it. Oil usually burns black/blue.

[tony/ka24de]

my car burns black, and I did a compression test, everything seems fine.

[MikeMurphy]

Maybe your TPS?

Lots of black smoke means your ride isnt regulating fuel properly at idle. My uneducated guess would include a TPS that nees to be cleaned. Are you sure it doesent smoke once you start going? What if you rev it standing still?

[tony/ka24de]

once my car starts to smoke while idle, i can hit the gas a bit and the smoke will go away for a while, Mine seems to smoke during start up, and when i come to an idle.

[tony/ka24de]

I am venting my bov to atmospher. Do you think this could be the problem?

[C-Kwik]

To me, everything is starting to point towards the valve stem seals.

[daniel240]

hey man, i noticed the same thing today. i left work and when i got to the first light, i noticed after sitting there a minute, i was smoking a little bit, and when i took off it stopped. but as i drove a little more its didnt do it anymore, like after my engine warmed up it stopped. i dont know what it could be. does yours do it all the time?

[Kool240]

Hey I know what the problem is. Your rear ring on your turbo is not sealing perfectly, and as the oil level in the turbo rises, Because your oil drain line is not big enough to flow it out or is not high enough on your pan. It gets pushed out and is burned.

[Toms240420]

mine smokes the same as everybody is describing, but mine is more of a blue color and smells like fuel. i hate to smoke in front of everybody unless i am passing a J.

[tony/ka24de]

hey kool 240, thats exactly what I think it is. I think that a little bit of oil is leaking right into the exhaust. But my oil drain is high enough in the pan and my oil feed is 1/2" dia. But my oil feed is 1/4" dia. I think that my oil line is too big, so I will try a smaller oil feed line.

[daniel240]

also, try a bigger return line. 1/2 is probably too small. im using 3/4.

[tony/ka24de]

Thats huge for a return line

[daniel240]

obviously not, because ive allready had problems w/ oil backing up. besides, it doesnt hurt to have too big of a return line.

[C-Kwik]

1/2 inch is fine if the hose is for the most part vertical. The opening for the oil drain in the turbo is about 1/2 inch...

[Kool240]

Also where is your valve cover breather hose going. is it on the boost side or the filter side of your turbo. I know a dude who's car smoked because the valve cover breather hose was on the boost side. it also made oil get into his intercooler piping. Hope this helps you guys out. Regaudless of what kind of turbo you have some have tighter seals than others and may not smoke and some will you can have the same turbo and one will smoke and one will not if the valve cover breather hose is on the boost side. its best to put a small breather filter right off the nipple of the valve cover insted of running it to the filter. Reason being if your filter gets dirty the turbo power can cause a vaccum and suck oil residue into your turbo.

Good luck

[Kool240]

hey kool 240, thats exactly what I think it is. I think that a little bit of oil is leaking right into the exhaust. But my oil drain is high enough in the pan and my oil feed is 1/2" dia. But my oil feed is 1/4" dia. I think that my oil line is too big, so I will try a smaller oil feed line.

your oil feed line is fine.............

[tony/ka24de]

I had mine valve cover line before the turbo

[Projex240]

There are 2 main reasons for smoking at idle. Valve seals--theis is common on supras. And the shaft seals in the turbo. There isnt any real cause other than too much oil pressure in the turbo. You can buy a turbo saver from JGS that will take out alittle pressure from the feed, and clean the oil before entering the turbo.Also, if it is the shaft seals, it is mostly caused by oil pressure in a new turbo. Shaft seals dont jsut crap out on new turbos for any old reason.

The return line--is it kinked or have any sharp angles in it?BTW---white smoke with no smell is also RAW unburnt fuel. I doubt that this is the problem. BUt Black smoke is fuel that is too rich but still burning--white smoke is coolant(smells slightly sweet) or raw unburnt fuel, and the blue-ish white smoke is usually oil.Im sure alot of us knew that, but just trying to clear it up.

I dont think its the valve seals--that kind of smoke (USUALLY) goes away after the motor warms up and the seals swell from the heat. But if they are REALLY bad--they can smoke al the time. But it would most likely smoke alot rather than just a little off and on if that were the case. Its Probably the turbos shaft seals.

[daniel240]

hmm, has anyone ever used that thing from jgs? ive never seen that before. where is that on their website? also, where does that go on the feed line?

[tony/ka24de]

my car is still smoking. I was wondering if it is possible for coolant from the turbo to enter into the exhaust or the intake through any seals?

[Projex240]

no coolant should be entering the turbo.

You dont even have to use coolant lines on the turbo.

[Projex240]

daniel--when you go to http://www.jgstools.comit should be on the opening page. You would normally have to click at the bottom to go on to the normal site.

[daniel240]

thanks man, i guess they dont have a price for it yet. i wonder if it actually restricts any oil , or if it just filters it.

[tony/ka24de]

are you sure that no coolant can enter into the intake or exhaust from the turbo. It seems to me when I first start my car in the morning, smoking appears. Also after I take my car out for a while and let the car idle for a while when I get back, it will smoke. The smoking will not take place right away. After a few miniuts. The smoke looks white to me. I want to run my turbo without coolant lines for a test . Is this safe.

[C-Kwik]

If it was coolant, the smoke would smell like coolant and have a humid feel to it. If not, it's likely oil. Valve stem seals tend to "cry" oil. At higher revs, it is diluted within the exhaust gases so much, it is not really visible. At idle, it tend to leak down, pool at the lowest point and then as it heats to an evaporative temperature, it turns into a vapor. Which is the white smoke you see. Turbine shaft leaks tend to be more constant and perhaps more apparent during higher RPM's where oil pressure is higher.

[tony/ka24de]

thanks