Hello to all, I've placed this message before, about my car smoking. And I received several responses, mostly pertaining to the turbo. It was recommended that I drop the down pipe and see if there was any oil in it. I did just that and found nothing, it was bone dry. Unfortunately my car is still smoking and the weirdest thing is that when I punch it a little before coming to a stop, she does not smoke, but if I just cruise it to a stop, she smoke's like crazy. I have pulled all but two hairs from my head, and before I go completely bald, can someone please give me an idea of where I should look next, or if someone has had the same thing happen to they're car, if they could tell me what if anything they have found out as to why this may be happening. As always I appreciate everyones time and help, have a great weekend and a happy easter, GNflyby. :O)
She's Still Smoking, Please Help!!!
- Thread starter GNflyby
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OneLethal87GN
R.I.P. Lethal GN
- Joined
- May 26, 2001
- Messages
- 1,255
I missed the last post. What color smoke?
Take the turbo right off and look as suggested. Unplug the pcv and see if it helps, take of the throttle body hose, see if its full of oil inside. If everything is fine, buy a bottle of lucas engine oil stabilizer, been running it for years, works great! wouldn't us eit in cold wather though, kinda thick
Originally posted by Gn-ing
sounds like it is pulling oil past the valve seals...or maybe a bad PVC valve or collapased hose..sounds like it's smoking under high vacuum conditions...does it smoke when first started? If it does,seals are bad..if it doesn't ck the PCV...
No it does not smoke when I first start it up, it seems that when it worms up, say about five minutes later after I start it, it starts to smoke. And the crazy thing is that when I hit the turbo a little it dosen't smoke. I don't get it, I read some of the other postings and I will check it out. I don't know about u guys, but for me this is embarresing (i don't know if i spelled that right), but you know what I mean. Such a beautiful car and it's smoking! Hah!!
I agree with turbo, but, i still say it could be int valve seals. The car wont "burn" any oil until it gets warm enough to do it. Any immediate oil smoke would indicate ring wear-not that here.
Lucas, as mentioned, is awesome. It stopped my idle only smoke, but yea, a hassle to have to add. Can you remove a valve spring and check a seal for softness? If one is bad they all will be.
Lucas, as mentioned, is awesome. It stopped my idle only smoke, but yea, a hassle to have to add. Can you remove a valve spring and check a seal for softness? If one is bad they all will be.
Originally posted by ThikStik
I agree with turbo, but, i still say it could be int valve seals. The car wont "burn" any oil until it gets warm enough to do it. .
You do realize that as soon as the motor starts there is fire in the cylinders, right?
Most valve seal problems will cause smoke on startup because the oil drip down the guide into the cylinders when the car is off, causing it to burn that oil and smoke.
Its the turbo, just take it apart and see.
I meant the car wont burn any oil from those 2 sources, (turbo,valve seals)and then said that any immediate smoke would indicate ring wear. Im talking about from a cold start up.
Yes , i do realize that there is fire in the hole upon cold start-that is why everyone comes to me to have their carbs behave like fuel injection on 22 deg. days.
Yes , i do realize that there is fire in the hole upon cold start-that is why everyone comes to me to have their carbs behave like fuel injection on 22 deg. days.
If you are leaking oil into the cylinders through the valve guide, it will most certainly burn it upon startup. You have to had seen a late model chevy pickup blow blue smoke on startup, they are notorious for it. They do that because the valve seals go bad, leak oil into the combustion chamber while sitting, then it burns that oil as soon as you start the vehicle.
Ring wear will generally create constant smoke as well as blow by which will be very evident on a GN due to the forced induction.
To the original poster: I had the same problem, it was the turbo, I had no oil in my down pipe, but upon inspection of the turbo, found oil leaking out og the seals. Most of the time when a turbo starts to go bad, it will not smoke under boost, but at idle and light cruise.
Ring wear will generally create constant smoke as well as blow by which will be very evident on a GN due to the forced induction.
To the original poster: I had the same problem, it was the turbo, I had no oil in my down pipe, but upon inspection of the turbo, found oil leaking out og the seals. Most of the time when a turbo starts to go bad, it will not smoke under boost, but at idle and light cruise.
I can see very worn valve seals cause some smoke upon cold start, but Flyby stated that it takes 5 minutes or so to really start smoking good. And with that info , I myself suggested "its probably turbo, but check valve seals." The oil is thicker FROM A DEAD COLD START, and will not run into guides as readily. Yes, if it did, the combustion event woud burn it. I shoudve not referred to "ability to burn oil" in my 1st post. Anyway, my 129k worn out GN had bad seals and it wouldnt smoke good until up to temp. Yes, im sure a diff head, like a Chev could let cold oil in more readily. Maybe due to diff valve stem boss area.
My new motor last year had a "high vacuum" smoke problem. I blocked off the PCV, we changed the intake gasket and it still smoked. It turned out 80% of the smoke was from a bad oil seal in a brand new turbo - go figure!!!
The motor had new Champion aluminum heads and the exhaust valve guides on mine were ridiculously "loose" causing the rest of the smoke problem ( I observed a lot of cars with Champion heads were smoking in the pits at Bowling Green last year). The turbo was repaired and new exhaust guides went in and now I have no smoke at all.
I had no oil in my downpipe, I bet it's likely it's the turbo. Maybe you can swap your stock one back on to test it??? Paul
The motor had new Champion aluminum heads and the exhaust valve guides on mine were ridiculously "loose" causing the rest of the smoke problem ( I observed a lot of cars with Champion heads were smoking in the pits at Bowling Green last year). The turbo was repaired and new exhaust guides went in and now I have no smoke at all.
I had no oil in my downpipe, I bet it's likely it's the turbo. Maybe you can swap your stock one back on to test it??? Paul
Don't know untl you ask....
Look under your doghouse/plenum, toward the back on the intake manifold. There should be a large vacuum line running from the PVC to the vacuum block on top of your throttle body, so you can trace it back that way as well.
Look under your doghouse/plenum, toward the back on the intake manifold. There should be a large vacuum line running from the PVC to the vacuum block on top of your throttle body, so you can trace it back that way as well.
It's on the passenger side, in the intake manifold. There is a thick black hose connected to it. Pull out the PCV and see if it's loaded with oil.
You can as a test, pull out the PCV and plug the hose with the end of an old spark plug so you dont have a vacuum leak, with it disconnected or blocked off if you don't smoke at idle, maybe that was your problem. A $5 fix!
You can as a test, pull out the PCV and plug the hose with the end of an old spark plug so you dont have a vacuum leak, with it disconnected or blocked off if you don't smoke at idle, maybe that was your problem. A $5 fix!
Boy, I'd really love for someone to explain to me how a bad pcv all of a sudden starts ingesting oil. If it ingests oil, it will always ingest oil. A bad pcv will close, and might cause some blowby, or allow boost pressure into the crank case, but will not magically start sucking oil.
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