ManwithSupra Posted April 12, 2007 Share Posted April 12, 2007 Not sure how long this sound has been happening as you can only hear it when the fans are off and the radio is off.. basicly when stationary and in drive or reverse i am getting this tocka tocka tocka tocka deep knocking sound, when i take it out of gear its fine no sounds when i drive along it dissapeares as well !! You can hear it outside it seems to be coming from the gearbox i am sure its not coming from the engine. I have no issues with power still very strong, car always starts starts first time, no nocking or ticking sounds on startup and no smoke.... ahhhh help !! Quote Link to comment Share on other sites More sharing options...
ManwithSupra Posted April 12, 2007 Author Share Posted April 12, 2007 Can anyone help at all Please.. Quote Link to comment Share on other sites More sharing options...
pistonbroke Posted April 12, 2007 Share Posted April 12, 2007 If you rasie the revs with the handbrake on and in drive, does the knocking increase in sound or frequency along with the revs? Quote Link to comment Share on other sites More sharing options...
ManwithSupra Posted April 12, 2007 Author Share Posted April 12, 2007 not sure i am going to have to check at lunchtime which will be after 1pm. It dissapears when in drive and i start to move does that help at all? Quote Link to comment Share on other sites More sharing options...
pistonbroke Posted April 12, 2007 Share Posted April 12, 2007 Simple things first to check then. Check the fluid level in the gearbox by doing the following. Start the car up and let it warm up to normal temperature. Then put the car into reverse, then hold for 10 seconds, then put into drive and hold for 10 seconds, then back to reverse, and hold, then back to drive and hold. then put the car into park, and whilst the engine is running check the level on the G/box fluid dipstick. Quote Link to comment Share on other sites More sharing options...
ManwithSupra Posted April 12, 2007 Author Share Posted April 12, 2007 Ok will do these tests. 1st - Check to see if the knocking increases in sound and freq with the engine revs 2nd - Fluid levels Results after 1pm i hope its nothing serious. Would it be similar to this ... http://www.mkivsupra.net/vbb/showthread.php?t=73702&highlight=knocking+noise+gearbox Quote Link to comment Share on other sites More sharing options...
ManwithSupra Posted April 12, 2007 Author Share Posted April 12, 2007 Ok this has me worried now... 1st check - the knocking does not seem to increase it goes away between 600 and 1000rpm 2nd check fluid levels - gearbox level fluid still red and on the O in hot so thats ok I have discovered its coming from the back of the engine perhaps the gearbox perhaps not, either from the top of the gearbox or the cylinder head the car idle's at 530rpm and when you click it into drive or any gear it dips to about 490-500rpm which is probably to low. The knocking sound is very prounced when it idle's in gear then when you rev it the sound goes away, take it out of gear the sound is still there but fades away and is alot quieter.. increase the revs (not by much say to 1000rpm) and it goes away. I thought i would check the engine oil and its still between the markers (on the higher side of the marker) and have had it replaced not long ago so nice and golden still. I have noticed the sound is only there when the car is warm and down to hot idle, the car still has power and again the sound goes away when driving (sounds loevley and smooth) i am stumped now, if its a bad big end shell then surley it would get louder and deeper when more power is applied. Help ! Quote Link to comment Share on other sites More sharing options...
ManwithSupra Posted April 12, 2007 Author Share Posted April 12, 2007 Can no one help me? Has anyone got any idea's about this what so ever, i am dumfounded... If its the big ends then it will make a constant deep noise and when under load will get louder no matter how many revs - cant be this as the sound goes away over 900rpm when on load or not. Which makes me think its a Sticky valve or Shim problem Or something with the gearbox perhaps the TC has a problem or something... i really could not do with a big bill right now as my wedding is in a couple of weeks :s Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted April 12, 2007 Share Posted April 12, 2007 Sounds like a failed engine mounting to me. And if you don't like big bills definitely DO NOT get married. According to todays Mail 4 out of 10 people regret it, anyway Quote Link to comment Share on other sites More sharing options...
ManwithSupra Posted April 12, 2007 Author Share Posted April 12, 2007 Sounds like a failed engine mounting to me. Thanks chris makes me feel a whole lot better. Although i have to ask would it still be an engine mounting if the sound fades away when taken out of gear? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted April 12, 2007 Share Posted April 12, 2007 Absolutely, you remove the torque reaction when you take it out of gear, the mounting becomes less loaded. Quote Link to comment Share on other sites More sharing options...
pistonbroke Posted April 12, 2007 Share Posted April 12, 2007 idle is a bit low TBH, bearing in mind you've located an area where there is a noise, id check one more thing. There is a bracket that goes from the first catalyst, to the bell housing of the gearbox. I've read a couple of posts where the bracket has snapped causing the remainder of the bracket to resonate on the exhaust and gearbox. Its in just the place where you say the noise is coming from so check it out. If its not that, I'd go with the engine mount too. Never doubted CW's knowledge Quote Link to comment Share on other sites More sharing options...
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