Lude Posted February 22, 2012 Share Posted February 22, 2012 (edited) history ive had all the IC pipes off & all the stock vacuums, i did a little clearing up, replacing the hard vacuum lines with silicone. thread here http://www.mkivsupra.net/vbb/showthread.php?258831-Been-spraying-the-sequential-turbo-pipes-) if i have the car stationary, and rev the car, it sounds normal. there are no leaks at all, can hear the dump valve sound, and there are no whitles/squeels. when you drive, as the 1st turbo is coming in i can hear a loud whistling, as if its a boost leak whistle. second turbo comes in fine (i think) but when coming off boost the dump valve doesnt sound? all the IC pipes and 100% tight, and all the vacuums are brand new i double checked where all the vacuums were supost to go, and am 99% sure they are all correct, but even if i did connect somethimg wrong would it stil whistle? or is whitling always a sign of a leak? Edited February 22, 2012 by Lude (see edit history) Quote Link to comment Share on other sites More sharing options...
Lude Posted February 22, 2012 Author Share Posted February 22, 2012 ive just removed the dump valve and its still making the noise. the turbos are both coming in when suppost to, and boosting properly. just the whistling boost leak sound anyone any ideas? Quote Link to comment Share on other sites More sharing options...
welshbuddy Posted February 22, 2012 Share Posted February 22, 2012 does it sound like a screaming cat?!... check all the pipes and gaskets are down, i know this has happened to some one before. Quote Link to comment Share on other sites More sharing options...
Lude Posted February 22, 2012 Author Share Posted February 22, 2012 no mate its not like a meaw or an eek. its a high pitch whistle, noise comes on quite early, doesnt need to be making posotive boost. it must be a leak somewhere, iv no idea where though, will have to take all the IC pipes off and on again. its obvuus that area as it was fine before, just thaught that i had maybe connected the vacuums wrong, can anyone clarify that the vacuums wont effect the sound? what about if i put into TTC mode would that determine anything? Quote Link to comment Share on other sites More sharing options...
Guest George89 Posted February 22, 2012 Share Posted February 22, 2012 can you post a few pictures of your engine bay? and some close ups of vacuum pipes you changed recently. Quote Link to comment Share on other sites More sharing options...
bradleyh_15 Posted February 23, 2012 Share Posted February 23, 2012 Post a video of the noise mate! Not the infamous turbo death whine is it!? Quote Link to comment Share on other sites More sharing options...
Scott Posted February 23, 2012 Share Posted February 23, 2012 If the dump valve isn't sounding then I would guess that's your problem. Where are you actuating the dump valve from? Where is it plumbed into? Have you blocked off the BOV return (if aftermarket and VTA)? Quote Link to comment Share on other sites More sharing options...
mellonman Posted February 23, 2012 Share Posted February 23, 2012 it wouldnt suprise me if you had put a vac pipe on wrong as if it didnt do it before then its definatly something you have done. double check then tripply check. for a boost leak take off the intake side and get some water + fairy liquid on the joins that may leak and put your hand over the ic intake pipe and give it a rev to bult preasure and see if you can see bubles forming on the joints that you have used the solution on. Quote Link to comment Share on other sites More sharing options...
ashbuster Posted February 23, 2012 Share Posted February 23, 2012 does it sound like a jet? my car sounds like a jet and always has since i bought it i can hear alot of air and carnt find no leaks and im not sure if it should sound like this because i havent seen another turbo supra on the road Quote Link to comment Share on other sites More sharing options...
Dnk Posted February 23, 2012 Share Posted February 23, 2012 Does it sound like a train whistle or more like a refs whistle ? or perhaps a kettle whistle ? Quote Link to comment Share on other sites More sharing options...
Lude Posted February 23, 2012 Author Share Posted February 23, 2012 can you post a few pictures of your engine bay? and some close ups of vacuum pipes you changed recently. pics of vacuums are here, http://www.mkivsupra.net/vbb/showthread.php?258831-Been-spraying-the-sequential-turbo-pipes- If the dump valve isn't sounding then I would guess that's your problem. Where are you actuating the dump valve from? Where is it plumbed into? Have you blocked off the BOV return (if aftermarket and VTA)? i have removed the dump valve and the noise is still there, it was here though.. (normal place) i have blocked off the return, but only with gaffa tape & small jubilee clip, as it doesnt have high pressure out of it, and i used to have this before. only thing diffirent i ran with the dv this time, was using the vacuum from T piece on the boost controller? it wouldnt suprise me if you had put a vac pipe on wrong as if it didnt do it before then its definatly something you have done. double check then tripply check.. would this casue a noise though? the 1st & 2nd turbo are coming in when supost to? Does it sound like a train whistle or more like a refs whistle ? or perhaps a kettle whistle ? like a kettle hissy whistle thanks for input, im affraid i cant see the car again until a week satuarday as im working away :/ Quote Link to comment Share on other sites More sharing options...
Drew_flux Posted February 23, 2012 Share Posted February 23, 2012 I wonder if one of your hose blockoff's has a hole or come off. soapy water if your friend here. Quote Link to comment Share on other sites More sharing options...
Scott Posted February 23, 2012 Share Posted February 23, 2012 pics of vacuums are here, http://www.mkivsupra.net/vbb/showthread.php?258831-Been-spraying-the-sequential-turbo-pipes- i have removed the dump valve and the noise is still there, it was here though.. (normal place) http://i181.photobucket.com/albums/x169/lude200/2012-02-11162949.jpg i have blocked off the return, but only with gaffa tape & small jubilee clip, as it doesnt have high pressure out of it, and i used to have this before. only thing diffirent i ran with the dv this time, was using the vacuum from T piece on the boost controller? Ohhhkayyyy... I'm out. Quote Link to comment Share on other sites More sharing options...
Lude Posted February 23, 2012 Author Share Posted February 23, 2012 lol ok scott i will block that properly, but it was like that before. will get that blocked & soapy water test. and maybe remove all the IC pipes and refit... Quote Link to comment Share on other sites More sharing options...
mellonman Posted February 23, 2012 Share Posted February 23, 2012 Ohhhkayyyy... I'm out. haha agreed Quote Link to comment Share on other sites More sharing options...
Scott Posted February 23, 2012 Share Posted February 23, 2012 (edited) This is just a guess because given the botching that's been done with the BOV return I hate to guess what else has gone on in and around the sequential system.... When your turbo comes online the turbo inlet tries to draw in air. This will put a vacuum on the intake system and also a vacuum onto the taped up return port. My guess is that this tape isn't quite to the standard that a proper bung would be and therefor it's allowing some air to be sucked in through it. If you suck air in through 2 pieces of paper you get a high pitched whine so I have to assume that's where the noise is coming from. The turbos would still work just fine in this instance but you will be drawing in un-filtered air (huge no-no). As for the BOV not working I don't really know without seeing how you have plumbed it all in, not so sure I would want to see it to be honest... I'm all cringed out You want the BOV on its own vac reference line if you can, the stock one on the rats nest is ideal. BTW the pictures you have posted up to allow us to diagnose your issues are useless, they are tiny and not very detailed at all. You need to get some decent resolution and focused pictures of the areas people are asking for. Edited February 23, 2012 by Scott (see edit history) Quote Link to comment Share on other sites More sharing options...
bradleyh_15 Posted February 23, 2012 Share Posted February 23, 2012 This is just a guess because given the botching that's been done with the BOV return I hate to guess what else has gone on in and around the sequential system.... When your turbo comes online the turbo inlet tries to draw in air. This will put a vacuum on the intake system and also a vacuum onto the taped up return port. My guess is that this tape isn't quite to the standard that a proper bung would be and therefor it's allowing some air to be sucked in through it. If you suck air in through 2 pieces of paper you get a high pitched whine so I have to assume that's where the noise is coming from. The turbos would still work just fine in this instance but you will be drawing in un-filtered air (huge no-no). As for the BOV not working I don't really know without seeing how you have plumbed it all in, not so sure I would want to see it to be honest... I'm all cringed out You want the BOV on its own vac reference line if you can, the stock one on the rats nest is ideal. BTW the pictures you have posted up to allow us to diagnose your issues are useless, they are tiny and not very detailed at all. You need to get some decent resolution and focused pictures of the areas people are asking for. Excellent posting a always Quote Link to comment Share on other sites More sharing options...
Lude Posted February 23, 2012 Author Share Posted February 23, 2012 scott check the link on first page, high resolution pics are there, will try a seperate vacuum for the bov and put a propper bung on the return.. as said im away working til next week so il have another look at it then.. :-) thanks for coments will update all when im back Quote Link to comment Share on other sites More sharing options...
Scott Posted February 23, 2012 Share Posted February 23, 2012 scott check the link on first page, high resolution pics are there, will try a seperate vacuum for the bov and put a propper bung on the return.. as said im away working til next week so il have another look at it then.. :-) thanks for coments will update all when im back I guess we have different opinions of what high resolution means Quote Link to comment Share on other sites More sharing options...
Lude Posted March 3, 2012 Author Share Posted March 3, 2012 update: done a propper boost leak test today. removed air filter & blocked off. put a tyre valve to the intake manifold. had a compresser, filled the engine to aroun 0.5Bar (thats all it would hold) put soapy water around all the IC pipes, dv, all fine. put some over where the throttle body connects to the intake manifold, leaking there also leaking where the intake manifold connects to the runners, and where the idle valve connects to the intake manifold. this is because i have had all the manifold off recently, to clean & paint it up. PS no air was leaking where the duck tape covered the dv return pipe. wil get a nice rubber one though. i will admit now the ferris beuler method woudnt have been pritty dumb glad i know where the leak is from, i re-used the existing metal gaskets, is this the reason why its leaking air? or have i not got the manifold sitting/tightened unevenly? Quote Link to comment Share on other sites More sharing options...
suprasize Posted March 5, 2012 Share Posted March 5, 2012 I had a similar thing, got the turbos overhauled and as they stripped them they found 1/4' of the compressor wheel missing... :/ Quote Link to comment Share on other sites More sharing options...
mellonman Posted May 13, 2012 Share Posted May 13, 2012 Right as the op cant be bothered to update this he found the compressor fins damaged on the first turbo,probably due to poor workmen ship when cleaning and painting letting something get into the intake. Quote Link to comment Share on other sites More sharing options...
Lude Posted May 19, 2012 Author Share Posted May 19, 2012 yes as mellonman has stated "i cant be bothered" to update this, nothing to do with me working 6 days a week or anything, i cant be bothered apparently... anyway, yes for anyone who has similar problem, one of the fins on the 1st turbo became damaged, must have been when it was exposed. lesson too all you can never be too careful when working with the turbo. i thought i was very careful, obvious not enough. when new turbo is on il edit this post Quote Link to comment Share on other sites More sharing options...
mellonman Posted May 19, 2012 Share Posted May 19, 2012 well you did find time to start a new thread didnt you! how else would i know? point proven! i even asked you to update this thread in your new one witch you didnt Quote Link to comment Share on other sites More sharing options...
Lude Posted June 28, 2012 Author Share Posted June 28, 2012 bump - correction to thread! got the turbo on last night. car still makes the noise! :-( spent £500 on new turbo for nothing. back to the drawing board to find the noise. gutted Quote Link to comment Share on other sites More sharing options...
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