Swampy442 Posted April 19, 2008 Share Posted April 19, 2008 Id say valve stem seals. My experience of turbo failure was no smoke when cold, under boost or over run, only when it was warm and on idle. Are your turbos noisy on boost? Quote Link to comment Share on other sites More sharing options...
DannoSupra Posted April 19, 2008 Author Share Posted April 19, 2008 Turbo's seem to be ok.. yes they are noisier, only because i had to put an induction kit cos of IC pipework.... but they boost all the same, no smoke under boost. Did have an issue before with noise, but it turned out to be a weak vac hose joint, sorted that and it was ok. It'll smoke on Idle when warm, sometimes upton startup. And after a rev like in the vid. If the Turbo Seals have gone, will it trickle into the Inlet side too? i know a bit of oil is normal, in say the BOV, Is there a way of saying that they are gone without having to send them away, i cant be spending more on it if i want to sell.. but i cant sell it like this, i want it to be perfect and spot on for the next owner Quote Link to comment Share on other sites More sharing options...
Suprash Posted April 19, 2008 Share Posted April 19, 2008 Turbo's seem to be ok.. yes they are noisier, only because i had to put an induction kit cos of IC pipework.... but they boost all the same, no smoke under boost. Did have an issue before with noise, but it turned out to be a weak vac hose joint, sorted that and it was ok. It'll smoke on Idle when warm, sometimes upton startup. And after a rev like in the vid. If the Turbo Seals have gone, will it trickle into the Inlet side too? i know a bit of oil is normal, in say the BOV, Is there a way of saying that they are gone without having to send them away, i cant be spending more on it if i want to sell.. but i cant sell it like this, i want it to be perfect and spot on for the next owner Mate I would count out turbo seals for now until you have reason to suspect them, everything you have said and the video points to valve stem seals...... There was a good test that someone posted on here, think it might have been Nic, but he said something like floor it to a certain revs, let off and then blip the throttle, if you get a puff of smoke then its deffo valve stem seals, I will try and find it..... Quote Link to comment Share on other sites More sharing options...
DODGYDODDS Posted April 19, 2008 Share Posted April 19, 2008 danno do you get any smoke one over-run mate? Quote Link to comment Share on other sites More sharing options...
Darragh Posted April 19, 2008 Share Posted April 19, 2008 i wish mine smoked like that lol on start up my supra filled the street with white smoke and i mean you couldnt see anything lol found four of the cylinders were down power so she is getting a rebuild just out of curiosity (i dont no internals that well) were bouts in the head is the valve stem oil seals at? Quote Link to comment Share on other sites More sharing options...
DannoSupra Posted April 19, 2008 Author Share Posted April 19, 2008 They are basicly under the valve springs, on the head, you need to remove the cams etc to see them @ DODGYDODDS no mate it doesn't Quote Link to comment Share on other sites More sharing options...
Darragh Posted April 19, 2008 Share Posted April 19, 2008 i no were they are now, ill get a look when my engine is apart lol Quote Link to comment Share on other sites More sharing options...
Marty Posted April 19, 2008 Share Posted April 19, 2008 I'd say it was your turbo seals, 95%. Your valve stem seals would only smoke like that on idle if they were well and truely knackered! You'd be getting a hell of a lot of smoke on startup if this was the case. Worn valve stem seals only show themselves up on startup when the engine has been sitting long enough for oil to pass down the side of them and in to the combustion chamber. For oil to pass them quick enough and get in to the combustion chamber whilst the engine is running, and produce smoke, is very unlikely. For oil to pass through worn turbo seals when the engine/turbo/oil is hot is very likely All my own opinion obviously, and im usually wrong Quote Link to comment Share on other sites More sharing options...
Suprash Posted April 19, 2008 Share Posted April 19, 2008 http://www.mkivsupra.net/vbb/showpost.php?p=1894831&postcount=19 Quote Link to comment Share on other sites More sharing options...
Suprash Posted April 19, 2008 Share Posted April 19, 2008 I'd say it was your turbo seals, 95%. Your valve stem seals would only smoke like that on idle if they were well and truely knackered! You'd be getting a hell of a lot of smoke on startup if this was the case. Worn valve stem seals only show themselves up on startup when the engine has been sitting long enough for oil to pass down the side of them and in to the combustion chamber. For oil to pass them quick enough and get in to the combustion chamber whilst the engine is running, and produce smoke, is very unlikely. For oil to pass through worn turbo seals when the engine/turbo/oil is hot is very likely All my own opinion obviously, and im usually wrong But its not on idle, he blips the throttle and it smokes on over run, which is valve stem seals as over run causes a vacum on the top of the engine........ Quote Link to comment Share on other sites More sharing options...
DannoSupra Posted April 19, 2008 Author Share Posted April 19, 2008 But saying that, if your stem seals are well and trully gone, then it'll be like having no seals at all... And as i say, if my tubby's had gone then they'de be on the inlet side... and there's nothing Quote Link to comment Share on other sites More sharing options...
Suprash Posted April 19, 2008 Share Posted April 19, 2008 But saying that, if your stem seals are well and trully gone, then it'll be like having no seals at all... And as i say, if my tubby's had gone then they'de be on the inlet side... and there's nothing Danno, have a read of this, there is some good info in there by Ryan....... http://www.mkivsupra.net/vbb/showthread.php?t=146576&highlight=smoke Quote Link to comment Share on other sites More sharing options...
DannoSupra Posted April 19, 2008 Author Share Posted April 19, 2008 Yeah, had a good read cheers bud! Best thing to do is either get the engine out or, take cams off and have a look... i'll sort something out at the weekend!!! I got a 2poster now, so it's all good!! Quote Link to comment Share on other sites More sharing options...
DODGYDODDS Posted April 19, 2008 Share Posted April 19, 2008 My car has been off the road for weeks now:(, as mine started smoking, but it has now progressed to a ridiculous level. Especially bad on over run from 3.5krpm and lower. I have spoke to lots of people and garages and some say valve stems, and some say turbos, is there no difinitive test? Mine started to smoke last yr after i put a second hand set of j-spec tubbies on, as a replacement for faulty units. Because of this i think and hope it is my turbo seals Quote Link to comment Share on other sites More sharing options...
DannoSupra Posted April 19, 2008 Author Share Posted April 19, 2008 Im sure you could regulate some Ail Pressure up the Oil feed into the Turbo's and listen out for some Hissing Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted April 19, 2008 Share Posted April 19, 2008 A bit off topic but why do the 2jz's suffer from valve stem seals and the 1jz's dont? Quote Link to comment Share on other sites More sharing options...
DannoSupra Posted April 19, 2008 Author Share Posted April 19, 2008 They used crap rubber in the Factory Quote Link to comment Share on other sites More sharing options...
Suprash Posted April 19, 2008 Share Posted April 19, 2008 A bit off topic but why do the 2jz's suffer from valve stem seals and the 1jz's dont? Dunno, James at ToyotaGT was saying this to me only the other day, he said he just cant understand it..... Quote Link to comment Share on other sites More sharing options...
DannoSupra Posted April 19, 2008 Author Share Posted April 19, 2008 As they say - Nothing's Perfect!!! Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted April 19, 2008 Share Posted April 19, 2008 Looks like the 1jz is lol Quote Link to comment Share on other sites More sharing options...
Scooter Posted April 19, 2008 Share Posted April 19, 2008 A bit off topic but why do the 2jz's suffer from valve stem seals and the 1jz's dont? pretty sure its pretty much exclusively 2JZ-GTE's at that............not seen any reports from NA owners. Quote Link to comment Share on other sites More sharing options...
madwoody1 Posted April 19, 2008 Share Posted April 19, 2008 is it because the engine runs hotter? Quote Link to comment Share on other sites More sharing options...
Dnk Posted April 20, 2008 Share Posted April 20, 2008 Valve stem seals all day long....... Mine are the same......... The stem seals must be very knackered then as mine doesnt smoke like that when i rev it up and then shut off. Quote Link to comment Share on other sites More sharing options...
SilverSoop Posted April 20, 2008 Share Posted April 20, 2008 Well i get white smoke from a cold start but i just thought that this was condensation in the exhaust which obviously then makes it smoke a bit??? Quote Link to comment Share on other sites More sharing options...
Suprash Posted April 20, 2008 Share Posted April 20, 2008 Well i get white smoke from a cold start but i just thought that this was condensation in the exhaust which obviously then makes it smoke a bit??? That is condensation mate....... Quote Link to comment Share on other sites More sharing options...
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