listy Posted September 25, 2012 Share Posted September 25, 2012 (edited) Right, I have done a search, and come to the conclusion that this is caused by either turbo oil seals, or valve stem seals. This is on a 1993 NA-TT 5 speed. When starting the car (cold or hot) I'm getting white smoke from the exhaust. This doesnt appear to be present when driving, only at idle. There is also oil residue in the end of the exhaust, I know this happens anyway, but there appears to be more than normal. I cant see anything leaking from under the car or in the engine bay. (Every time I get home, I park on a large flattened box to try and catch any leaks.) I did see some rainbow effects on the ground though, this was before i used the box, but since I have been using the box, nothing has appeared. So, I'm *guessing* that somehow oil is getting into the exhaust from the turbo area? Also, the first turbo hesitates sometimes, as if it doesnt want to spool. Video showing the smoke and oil residue from the exhaust. Started from warm-ish, a few blips of the throttle, this is the result at idle. [video=youtube_share;AIBs-YcTu9Y] Edited September 29, 2012 by listy (see edit history) Quote Link to comment Share on other sites More sharing options...
Dnk Posted September 25, 2012 Share Posted September 25, 2012 (edited) Valve stem seals when leaking you get blueish grey smoke and usually only on start up after the engine has been off for at least a few hours. My car needed valve stem seals as they were shot but it only smoked on start up for 2-3 seconds after being parked up over night Edited September 25, 2012 by Dnk (see edit history) Quote Link to comment Share on other sites More sharing options...
listy Posted September 25, 2012 Author Share Posted September 25, 2012 So you reckon VSS can be put to one side? Thats a bit of good news i suppose Any ideas what it could be? Turbo oil seals possibly? Oh, and it sometimes hesitates boosting on turbo 1. Quote Link to comment Share on other sites More sharing options...
dr_jekyll Posted September 25, 2012 Share Posted September 25, 2012 lovely finger work. clearly a hit with ladies Quote Link to comment Share on other sites More sharing options...
listy Posted September 25, 2012 Author Share Posted September 25, 2012 I'm also getting the car up on the ramp at work thursday, so can have a good look underneath, as cant see anything from the top. Saying that, if its turbo oil seals, will I see anything anyway without removing the turbos? Quote Link to comment Share on other sites More sharing options...
listy Posted September 26, 2012 Author Share Posted September 26, 2012 Think I found the cause of the rainbow effects! Something clear is leaking from around the front right wheel. Not sure if its shocks or something else, but cant think of anything else in that area that would leak, as its definitely not the brakes. Quote Link to comment Share on other sites More sharing options...
Suprab1 Posted September 26, 2012 Share Posted September 26, 2012 Think I found the cause of the rainbow effects! Something clear is leaking from around the front right wheel. Not sure if its shocks or something else, but cant think of anything else in that area that would leak, as its definitely not the brakes. Power steering rack? Quote Link to comment Share on other sites More sharing options...
listy Posted September 26, 2012 Author Share Posted September 26, 2012 Could be. I'll check when on the ramp tomorrow Quote Link to comment Share on other sites More sharing options...
Suprab1 Posted September 26, 2012 Share Posted September 26, 2012 Is that really oil on your finger? It looks like just black exhaust crap that is getting wet because the car is running. The white smoke looks normal to me. Does anyone have a supra with an aftermarket exhaust that doesn't smoke a little on idle? Quote Link to comment Share on other sites More sharing options...
listy Posted September 26, 2012 Author Share Posted September 26, 2012 It looks like burnt oil to me. It could be normal exhaust residue, theres just much more than usual. It only started smoking recently and its been BPU double decat since I had it. This coupled with the hesitation on the first turbo has me a little worried that tubby 1 may be on its way out/oil seals gone. Quote Link to comment Share on other sites More sharing options...
stevie_b Posted September 26, 2012 Share Posted September 26, 2012 White smoke usually suggests water. Normal if the car's cold, not so normal if it's warm. Quote Link to comment Share on other sites More sharing options...
listy Posted September 26, 2012 Author Share Posted September 26, 2012 I have let it run up to normal temperature and it is still smokey, but it comes and goes. I havnt noticed it today. Thinking about it, I have only noticed it since it has been wet recently. Could it be something as simple as rain getting in the exhaust? The coolant stays level and isnt being thrown into the expansion tank, so HG is safe VSV's according to Dnk can be ruled out. Still concerned about the tubby oil seals due to the hesitation on tubby 1. Any ideas on that one? A mate suggested cleaning the MAF sensor. Would that help? Quote Link to comment Share on other sites More sharing options...
dan294 Posted September 26, 2012 Share Posted September 26, 2012 It will only have a MAF if it is a VVTi engine. It could be something as simple as water sitting in the exhaust. Condensation smoke has re-appeared in mine now it is raining more and colder overnight. Quote Link to comment Share on other sites More sharing options...
Noz Posted September 26, 2012 Share Posted September 26, 2012 Isn't white smoke turbo's? Maybe someone wee'd in your fuel tank mate. Quote Link to comment Share on other sites More sharing options...
Dnk Posted September 26, 2012 Share Posted September 26, 2012 On colder damp days you will get moisture being heated up inside the exhaust and it looks like this. Steam from a kettle is the best description Once my car is up to temp the condensation inside the exhaust is gone and it doesn't do it again till the car sits overnight in the cold, it doesn't keep doing it once warm. It doesn't do this though until we get colder weather, i am off to my car shortly so will take some photos when i start it up Quote Link to comment Share on other sites More sharing options...
dan294 Posted September 26, 2012 Share Posted September 26, 2012 It does look like it could be condensation, what does it smell like? Does it smoke if you rev it a lot? - - - Updated - - - On colder damp days you will get moisture being heated up inside the exhaust and it looks like this. Steam from a kettle is the best description Once my car is up to temp the condensation inside the exhaust is gone and it doesn't do it again till the car sits overnight in the cold, it doesn't keep doing it once warm. It doesn't do this though until we get colder weather, i am off to my car shortly so will take some photos when i start it up +1 on that. Mine is gone after about 5-10 minutes. Quote Link to comment Share on other sites More sharing options...
Dnk Posted September 26, 2012 Share Posted September 26, 2012 Okay i have just been to my car and fired it up after its not been run for over a week The photos show no smoke what so ever of any colour and this is on an engine and turbos that have done over 135,000 miles Quote Link to comment Share on other sites More sharing options...
listy Posted September 26, 2012 Author Share Posted September 26, 2012 This is my point Dnk. Mine never smoked until recently. And Noz, this is my worry. The hesitation on 1st turbo coupled with the white smoke spells bad news to me Just wishing someone could give me a better idea of whats wrong. I'll try and get a video of the hesitation later today. Quote Link to comment Share on other sites More sharing options...
listy Posted September 26, 2012 Author Share Posted September 26, 2012 Typical. On the way home from work, had the camera out and it wouldnt hesitate....until I put the camera down I'll try again tomorrow. Quote Link to comment Share on other sites More sharing options...
Dazzi Posted September 26, 2012 Share Posted September 26, 2012 Running rich? Done a service recently? 02 sensors ever been done etc? Quote Link to comment Share on other sites More sharing options...
listy Posted September 26, 2012 Author Share Posted September 26, 2012 Half way through doing a full service now, and the oil was changed when i did the oil pump a few months ago. Brake and power steering being done hopefully this weekend. O2 sensor not sure about, might just replace it anyway. Fuel pump and filter being replaced soon too. Dont have an AFR guage. How else can I tell if its rich or not? Saying that, a little rich is better than a little lean Quote Link to comment Share on other sites More sharing options...
ManwithSupra Posted September 26, 2012 Share Posted September 26, 2012 On colder damp days you will get moisture being heated up inside the exhaust and it looks like this. Steam from a kettle is the best description Once my car is up to temp the condensation inside the exhaust is gone and it doesn't do it again till the car sits overnight in the cold, it doesn't keep doing it once warm. It doesn't do this though until we get colder weather, i am off to my car shortly so will take some photos when i start it up 100% Correct. I see a thread like this pop up evey year when it gets colder from summer. It should be put on a sticky Quote Link to comment Share on other sites More sharing options...
ManwithSupra Posted September 26, 2012 Share Posted September 26, 2012 (edited) How else can I tell if its rich or not? Saying that, a little rich is better than a little lean You can’t really... well you can’t accurately. There are things like soot in the exhaust or sooty plugs, however even then looking at the plugs it’s not that accurate as it will only tell you how rich it is when you are idling not when you are using the car (unless you were to whip out a plug when going along - Not advisable) Running too rich is just as bad as running too lean. If you run too rich for extended periods you will get something called bore wash and you will wear you piston rings very quickly (Petrol is a thinner and therefore too much will remove the thin layer that oil your piston rings lay down on the cylinder walls). Get an AFR gauge and Sensor. Edited September 26, 2012 by ManwithSupra (see edit history) Quote Link to comment Share on other sites More sharing options...
Slicknick Posted September 26, 2012 Share Posted September 26, 2012 Looks like condensation to me, the hesitation on number 1 tubby could be a split vac hose, sticky waste gate, faulty boost controller if you have one? Many things to check before looking at turbo failure... Quote Link to comment Share on other sites More sharing options...
listy Posted September 27, 2012 Author Share Posted September 27, 2012 Right. Got the car on the ramp and the good news ( I think) is I can't see any oil leaking from the turbos. So I think tubby oil seals can be ruled out? I'll check all the vac hoses now. How do I check to see if the wastegate is sticking? No boost controller. Quote Link to comment Share on other sites More sharing options...
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