scott87 Posted September 13, 2012 Author Share Posted September 13, 2012 Personally I would whip off the fan/aux belt and "briefly" restart it and see if the noise is still there. This will rule out/confirm a pulley noise. Does belt sit slightly off the pulley, towards the engine or towards the bumper? It is slightly off towards the front bumper. Very fractionally. How does one remove the belt, i could not see a tensioner as there was on the mr2... Quote Link to comment Share on other sites More sharing options...
ripped_fear Posted September 13, 2012 Share Posted September 13, 2012 It is slightly off towards the front bumper. Very fractionally. How does one remove the belt, i could not see a tensioner as there was on the mr2... Tensioner is the middle one at the top smack in the middle of the plastic Cam cover. Quote Link to comment Share on other sites More sharing options...
scott87 Posted September 13, 2012 Author Share Posted September 13, 2012 Tensioner is the middle one at the top smack in the middle of the plastic Cam cover. The one the belt is on smooth side touching the pulley? If so this is the one that the belt is sitting slightly off. Quote Link to comment Share on other sites More sharing options...
ripped_fear Posted September 13, 2012 Share Posted September 13, 2012 The one the belt is on smooth side touching the pulley? If so this is the one that the belt is sitting slightly off. this is the tensioner- Quote Link to comment Share on other sites More sharing options...
scott87 Posted September 13, 2012 Author Share Posted September 13, 2012 this is the tensioner- http://www.mkivsupra.net/vbb/attachment.php?attachmentid=157310&stc=1&d=1346954402 Mine doesn't have a cover on it. But yes the pulley im talking about is slap bang in the middle and the smallest of them all. This is the one the belt is not quite sitting on right. I moved the belt but it goes back to sitting off slightly. The belt goes on this tensioners smooth side down correct? Quote Link to comment Share on other sites More sharing options...
ripped_fear Posted September 13, 2012 Share Posted September 13, 2012 Yes smooth side down correct You need to get a picture of how yours is sitting i think. Quote Link to comment Share on other sites More sharing options...
scott87 Posted September 13, 2012 Author Share Posted September 13, 2012 (edited) Yes smooth side down correct You need to get a picture of how yours is sitting i think. Ok i will try and get a photo. But like i said it is maybe a millimetre over the edge of the pulley. Am i looking in the right area though for the vibrations im getting? I assume the belt should sit perfectly in the middle of the pulley though. Also a pretty hard question to answer, but if the car is driving great and feels fine in every way apart from making this noise, should i be worried about making necessary journeys? Edited September 13, 2012 by scott87 (see edit history) Quote Link to comment Share on other sites More sharing options...
ripped_fear Posted September 13, 2012 Share Posted September 13, 2012 Here you go bud, this is my old tensioner and it failed causing a rattle and vibration but it sounded nothing like the problems you are experiencing. But this picture shows you how the aux belt should sit and its almost flush with the edge. I found if I pulled gently on the aux belt (while the car is off obviously), it gave me a creaking noise. I personally would be reluctant to use the car untill I had it checked over properly, as you dont want to make any problem worse. Quote Link to comment Share on other sites More sharing options...
Scooter Posted September 13, 2012 Share Posted September 13, 2012 Ok i will try and get a photo. But like i said it is maybe a millimetre over the edge of the pulley. Am i looking in the right area though for the vibrations im getting? I assume the belt should sit perfectly in the middle of the pulley though. Also a pretty hard question to answer, but if the car is driving great and feels fine in every way apart from making this noise, should i be worried about making necessary journeys? ok if it's off at the front look very closely at the lowest pulley (crank pulley).........search for "Crank pulley" and "tippex"....to see if it is further out than it should be as it could be that, that is making the belt drift off the front of the tensioner wheel. Take a picture of the belt as is for reference (you may have a picture of the belt run on the underside of the bonnet) Get a 14mm spanner and place it on the nut/bolt on the centre of the tensioner with the spanner horizontal and pointing towards the battery. Push down hard and the tensioner will slacken, and with enough beans you can slip the belt off completely. Then have a grope of the pulleys and report back. Again I would then start it and run it BRIEFLY (as the water pump won't be turning) to see if the noise is still there. Quote Link to comment Share on other sites More sharing options...
scott87 Posted September 13, 2012 Author Share Posted September 13, 2012 Here you go bud, this is my old tensioner and it failed causing a rattle and vibration but it sounded nothing like the problems you are experiencing. But this picture shows you how the aux belt should sit and its almost flush with the edge. I found if I pulled gently on the aux belt (while the car is off obviously), it gave me a creaking noise. http://www.mkivsupra.net/vbb/attachment.php?attachmentid=157624&stc=1&d=1347566509 I personally would be reluctant to use the car untill I had it checked over properly, as you dont want to make any problem worse. Spot on thank you for that photo. My belt is sitting further towards the edge of the pulley than that. Basically mine is sitting the same as yours but rather than free space being front bumper side like yours has in the photo, my belt is right up at the edge of the pulley..... The belt looks in fairly good shape so i didnt think it was that. But im just hunting for what the heck it could be. Have you listened to the video? It really doesn't sound knocky imo so im just trying to narrow it down. Thanks for the photo though Quote Link to comment Share on other sites More sharing options...
ripped_fear Posted September 13, 2012 Share Posted September 13, 2012 (edited) TBH listening to the video it doesn't sound like its coming from the pulleys, more the Exhaust side of the block, but the without seeing it in the flesh/metal its very difficult to say. If you are convinced its coming from the front then take scooters advice and do the tipex test on the crank pulley, (The bottom pulley on the engine) As if it is this, then you do not want it failing, especially when on the move, as you can say good by to the Viscous fan, belt, rad, and anything else it decides to hit on the way of the engine. If the belt is sitting as you say, then something sounds like it is not be correct with one of the pulleys, but weather thats the cause of the noise or not is a different question. Edited September 13, 2012 by ripped_fear (see edit history) Quote Link to comment Share on other sites More sharing options...
scott87 Posted September 13, 2012 Author Share Posted September 13, 2012 TBH listening to the video it doesn't sound like its coming from the pulleys, more the Exhaust side of the block, but the without seeing it in the flesh/metal its very difficult to say. If you are convinced its coming from the front then take scooters advice and do the tipex test on the crank pulley, (The bottom pulley on the engine) As if it is this, then you do not want it failing, especially when on the move, as you can say good by to the Viscous fan, belt, rad, and anything else it decides to hit on the way of the engine. If the belt is sitting as you say, then something sounds like it is not be correct with one of the pulleys, but weather thats the cause of the noise or not is a different question. Ok thanks. Im just thinking after reading that other post about the dampner. The engine resinating vibrations etc, if this was going causing more vibration, then the engine and everything connected would be vibrating more, especially at idle. Would explain why when i lift the revs it goes away. Also why ive had a tiny bit of belt squeal. Quote Link to comment Share on other sites More sharing options...
Littler Posted September 13, 2012 Share Posted September 13, 2012 Just to suggest something really random, but could the vibration be due to engine mount wear? Not sure on the belt squeal though. Quote Link to comment Share on other sites More sharing options...
scott87 Posted September 13, 2012 Author Share Posted September 13, 2012 Just to suggest something really random, but could the vibration be due to engine mount wear? Not sure on the belt squeal though. I did think about this too. But it seems very rattly for that. I would imagine that this would also cause other problems when accelerating hard or breaking. In my mr2 you could almost feel the block rocking.... Quote Link to comment Share on other sites More sharing options...
scott87 Posted September 13, 2012 Author Share Posted September 13, 2012 So to remove this belt what do i do? Do i simply loosen the tensioner pulley and slip the belt off. How long can i run it for, 30 seconds? Should i try pulling the cam pulley from side to side to check for movement before doing anything. I spoke with keron at performance in leicester and said i can pop over tomorrow, so il have to drive it to him then... Quote Link to comment Share on other sites More sharing options...
scott87 Posted September 14, 2012 Author Share Posted September 14, 2012 Spent the afternoon with Keron at extreme-performance in Leicester. Absolute top bloke and a legend for fixing my car. Basically after looking at the car and hearing it running he figured the noise and vibration were being caused by the alternator. So he wipped it off and found that it was knackered. Im talking really buggered, ive never seen one that has broken in this way before and supposedly this was a new refurbed unit. Anyway the pulley had movement in it to the point where the reverse side had been carving into the housing of the alternator! Not only this the thread that the spindle connects to was moving in and out making a horrible noise. Ive taken a video of the alternator and posted here so you can see, but pretty worrying considering the unit is brand new refurb! Quote Link to comment Share on other sites More sharing options...
ripped_fear Posted September 14, 2012 Share Posted September 14, 2012 Well thank god for that! and another credit to the forum helping another member out! Keron is a top bloke glad he got your supra fixed. Quote Link to comment Share on other sites More sharing options...
scott87 Posted September 14, 2012 Author Share Posted September 14, 2012 Well thank god for that! and another credit to the forum helping another member out! Keron is a top bloke glad he got your supra fixed. Yer thanks to everyone on here to obv :-) Didnt have the play when belt had tension, wasnt until it was off the true broken pulley was discovered! Quote Link to comment Share on other sites More sharing options...
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