slickyddyer Posted November 14, 2010 Share Posted November 14, 2010 Ive put a 5 speed in my mk 2 cortina 1600 but has a rattle now from bellhousing area. Noise goes away when clutch is depressed. (Ruling out TO bearing!) Its quite loud. I used the original flywheel, lightened and had it mated to a sierra pressure plate and clutch. (new clutch kit, including TO bearing) Thought rattling was gearbox so removed it and had it rebuilt but put it back in and same rattling! Iv heard of lightweight flywheel chatter but I think something else as it's very loud and must be doing damage somewhere. Any other ideas? Quote Link to comment Share on other sites More sharing options...
EFI_LC Posted November 14, 2010 Share Posted November 14, 2010 flywheel sounds like it could be coming off? This is common if unbalanced or extreme revs in Holden 6's Generally the rattling goes away with clutch in and revs raised. The above sounds like rattly knock. Remove and check its going on flush, check bolts are correct length, if it is then dont run it til you fix it. A rattle can also be pressure plate fingers loose Quote Link to comment Share on other sites More sharing options...
slickyddyer Posted November 14, 2010 Author Share Posted November 14, 2010 flywheel sounds like it could be coming off?This is common if unbalanced or extreme revs in Holden 6's Generally the rattling goes away with clutch in and revs raised. The above sounds like rattly knock. Remove and check its going on flush, check bolts are correct length, if it is then dont run it til you fix it. A rattle can also be pressure plate fingers loose I did flywheel bolts up real good with rattle gun, but will check when removing gearbox tomorrow after visit to gearbox place that just dun it. see what they say. Pressure plate was brand new.. Whats the chances these parts I got are faulty? Quote Link to comment Share on other sites More sharing options...
jakesae101 Posted November 14, 2010 Share Posted November 14, 2010 flywheel sounds like it could be coming off?This is common if unbalanced or extreme revs in Holden 6's Generally the rattling goes away with clutch in and revs raised. The above sounds like rattly knock. Remove and check its going on flush, check bolts are correct length, if it is then dont run it til you fix it. A rattle can also be pressure plate fingers loose I did flywheel bolts up real good with rattle gun, but will check when removing gearbox tomorrow after visit to gearbox place that just dun it. see what they say. Pressure plate was brand new.. Whats the chances these parts I got are faulty? umm im sure flywheel bolts are ment to be torqued up not rattle gunned as this can damage them Quote Link to comment Share on other sites More sharing options...
EFI_LC Posted November 14, 2010 Share Posted November 14, 2010 i would not touch a rattle gun on flywheel bolts.... This could be the problem. I use a torque wrench and use the specified settings and loctite, this still came loose so I have now added lock tabs to mine and this has now stopped the problems I had. Mine was a situation where the Holden 6's have a well known harmonic vibration at around 6000rpm (max revs was 5400rpm) and my engine revs to 7000, I now try and change at 5900 or push through the harmonics area. Quote Link to comment Share on other sites More sharing options...
slickyddyer Posted November 14, 2010 Author Share Posted November 14, 2010 I was sure too but gun was faster Quote Link to comment Share on other sites More sharing options...
slickyddyer Posted November 14, 2010 Author Share Posted November 14, 2010 i would not touch a rattle gun on flywheel bolts.... This could be the problem. I use a torque wrench and use the specified settings and loctite, this still came loose so I have now added lock tabs to mine and this has now stopped the problems I had. Mine was a situation where the Holden 6's have a well known harmonic vibration at around 6000rpm (max revs was 5400rpm) and my engine revs to 7000, I now try and change at 5900 or push through the harmonics area. I dont have vibrations. I have a rattling clutch or something. Only at idle. A lumpy idle. Goes away clutch in. Quote Link to comment Share on other sites More sharing options...
EFI_LC Posted November 14, 2010 Share Posted November 14, 2010 i would not touch a rattle gun on flywheel bolts.... This could be the problem. I use a torque wrench and use the specified settings and loctite, this still came loose so I have now added lock tabs to mine and this has now stopped the problems I had. Mine was a situation where the Holden 6's have a well known harmonic vibration at around 6000rpm (max revs was 5400rpm) and my engine revs to 7000, I now try and change at 5900 or push through the harmonics area. I dont have vibrations. I have a rattling clutch or something. Only at idle. A lumpy idle. Goes away clutch in. rattle guns might be ok on wheels but definetely not engine parts and particularly parts that could remove your feet if it parted company. I was more saying my scenario to point out that sometimes pushing engines past what they were designed for can produce unknown issues, The 6000rpm vibration is not noticeable but we know its there as in the 1970s it caused all sorts of issues including spinning the factory harmonic balancer on its rubber mount and loosening flywheels and fatigued pistons and rods prematurely. Quote Link to comment Share on other sites More sharing options...
slickyddyer Posted November 14, 2010 Author Share Posted November 14, 2010 It was only a electric rattler. not a bad boy air one. not much grunt to them compared to air. Ok now your done telling me off... hehe do you think it could be a bad pilot bearing? only thing not new in that area.. Quote Link to comment Share on other sites More sharing options...
EFI_LC Posted November 14, 2010 Share Posted November 14, 2010 It was only a electric rattler. not a bad boy air one. not much grunt to them compared to air.Ok now your done telling me off... hehe do you think it could be a bad pilot bearing? only thing not new in that area.. now for the real stuff. Ok so do you know what torque the bolts are meant to be? Do you know what torque they are now? As Jake said you may have damaged the bolts. Over tightening can stretch them and make them come loose easily. Under tightening can cause them to come loose. If you are sure it is a rattle/knock coming from there then it doesn't leave much and you need to look at it all thoroughly as if you spin this to 6000rpm just remember that a 7-9kg steel wheel with teeth is spinning at 100 times a second and if it comes off will saw through anything it comes in contact with and thats a reality. Quote Link to comment Share on other sites More sharing options...
slickyddyer Posted November 14, 2010 Author Share Posted November 14, 2010 They are meant to be 45 to 50lbs. theyd be just a wee bit tighter maybe at the mo. Will remove gearbox tommorw and see. Just put the bloody thing on friday Quote Link to comment Share on other sites More sharing options...
EURON8 Posted November 14, 2010 Share Posted November 14, 2010 Not the thrust bearing? It sits loose-ish when clutch engaged, and gets jammed between pressure plate and fork when clutch disengaged, so could be that/ i dont know. Hard to say with out hearing it Quote Link to comment Share on other sites More sharing options...
thegreatestben Posted November 14, 2010 Share Posted November 14, 2010 Definitely check the clutch bearing, It could also be the Input shaft Support bearing. Quote Link to comment Share on other sites More sharing options...
shizzl Posted November 14, 2010 Share Posted November 14, 2010 sounds like the input shaft bearing... ive experianced the same deal on a zf box Quote Link to comment Share on other sites More sharing options...
slickyddyer Posted November 14, 2010 Author Share Posted November 14, 2010 Definitely check the clutch bearing,It could also be the Input shaft Support bearing. Clutch bearing/support being pilot bearing? the one just in the flywheel? Quote Link to comment Share on other sites More sharing options...
slickyddyer Posted November 14, 2010 Author Share Posted November 14, 2010 sounds like the input shaft bearing...ive experianced the same deal on a zf box Just been rebuilt. input shaft bearing done. Quote Link to comment Share on other sites More sharing options...
thegreatestben Posted November 14, 2010 Share Posted November 14, 2010 The one that is pushed into the clutch by the fork, not the one in the flywheel. Also check installation of the pilot bearing while you're in there. The input shaft bearing can also be noisy and have the noise disappear once you disengage the clutch. Quote Link to comment Share on other sites More sharing options...
EURON8 Posted November 14, 2010 Share Posted November 14, 2010 Throwout bearing or the one that goes in the little hole in end of crankshaft Quote Link to comment Share on other sites More sharing options...
slickyddyer Posted November 14, 2010 Author Share Posted November 14, 2010 Throwout bearing or the one that goes in the little hole in end of crankshaft Im thinking pilot bearing/the one in end of crankshaft. Because its only thing not new. Thrust bearing is brand new Quote Link to comment Share on other sites More sharing options...
Beaver Posted November 14, 2010 Share Posted November 14, 2010 id be thinking its something youve played with/replaced etc rather then the old bits (assuming they worked fine before hand) Quote Link to comment Share on other sites More sharing options...
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