far Posted August 11, 2003 Share Posted August 11, 2003 Can someone help me out ? I will of course take this to a garage but just wondered if anyone has had something similiar. In 1st gear driving really slowly I can hear a noise like a rattle (almort like when you hear a diesel engine ticking over) when the car is idling it is fine,when I engage reverse it happens again. It is evident when I touch the accelerator too whilst listening under the engine, I got someone to turn the ignition off and listened underneath and the rattle is heard just as the ignition goes off - it seems to be coming from towards the middle of the block at the bottem.Sorry for the lame description but im not a techie ! It wasnt tehre when I picked the car up and only started happening on saturday. I was thinking it maybe : Heat shield Cat Any ideas ? This is too soon for things to be going wrong:( especially after I looked so hard to find a nice car. oh BTW the car is driving fine in terms of pick up and acceleration - it idles fine too Link to comment Share on other sites More sharing options...
Branners Posted August 11, 2003 Share Posted August 11, 2003 6sp gearboxes are noisy at the best of times, they get even worse when the flywheel gets worn. I would suggest its nothing to be worried about, listen to a few 6sp cars at a meet sometime and you will hear most of them do it. JB Link to comment Share on other sites More sharing options...
Matt Harwood Posted August 11, 2003 Share Posted August 11, 2003 How many miles has the car done? - I think I remember someone telling me the flywheels should be changed at around 40,000. I've recently changed mine and my old flywheel was totally knackered. They have springs inside that try to help reduce the stress on the drivetrain at high rpm gearchanges. As John says, the boxes are quite noisy anyway Alternatively, I had a similar rattle a while back that turned out to be the exhaust brace to the geabox working loose... Link to comment Share on other sites More sharing options...
far Posted August 11, 2003 Author Share Posted August 11, 2003 6sp gearboxes are noisy at the best of times, they get even worse when the flywheel gets worn. I would suggest its nothing to be worried about, listen to a few 6sp cars at a meet sometime and you will hear most of them do it Cheers JB - I thought they where just clunky but not rattly like mine, specially at low speeds.Also why the rattle when I turn the ignition off ? is this another common trend of the manual ? Im not 100% sure if the noise if soming from the gear box as its not when I change gear but when I am driving slowly Link to comment Share on other sites More sharing options...
far Posted August 11, 2003 Author Share Posted August 11, 2003 How many miles has the car done? 60,000 miles The other 6 speeds I test drove had clunky gearboxes but only when I changed gear - not the rattle on ignitioon switch off / low reavs - or maybe I just didnt notice as I wasnt in them long enough,so are we saying another characteristic of the manual gear box is the rattle at low revs ? Link to comment Share on other sites More sharing options...
Wez Posted August 11, 2003 Share Posted August 11, 2003 I think most of the rattle comes from the fly wheel. Mine is the same but haven`t got round to changing the fly wheel yet. Link to comment Share on other sites More sharing options...
far Posted August 11, 2003 Author Share Posted August 11, 2003 ok understood,so is it something which may cause further problems to the engine if it is left as it is ? or should I just replace it ? Link to comment Share on other sites More sharing options...
Paul Laing Posted August 11, 2003 Share Posted August 11, 2003 sorry to use your thread but how much is a Flywheel on a N/A mk4 Supra? I'm gonna be changing my clutch as soon as it's delivered from Fensport and just wondered if i should change the flywheel aswell. The cars done 65,000 miles How much can you get one for Terry as the LSD from you was fine. Just a standard flywheel not a lightened one for my N/A Paul Link to comment Share on other sites More sharing options...
Paul Laing Posted August 11, 2003 Share Posted August 11, 2003 i have the same problem as you mate, rattles at low revs but i think it's cos my release bearing has gone. It could be that? Does the clutch squeek really badly? Paul Link to comment Share on other sites More sharing options...
far Posted August 11, 2003 Author Share Posted August 11, 2003 no squeek from the clutch at all just the rattle at low revs Link to comment Share on other sites More sharing options...
SMW Posted August 11, 2003 Share Posted August 11, 2003 Far Do you have any hard pipes that are close to the body work? I'm thinking mainly on the drivers side and particularly if you have one that goes through the inner wing(is it called that?) I had a noise similiar to what you describe and it turned out to be this pipe hitting the inner wing. Couldn't hear the noise at higher speed/revs. Link to comment Share on other sites More sharing options...
far Posted August 11, 2003 Author Share Posted August 11, 2003 Do you have any hard pipes that are close to the body work? Not sure but its going on a ramp tonight after work to be checked out - I will check these out when im under there.Im hoping it is something simple like a heat shield come loose or a pipe knowcking against the body. Link to comment Share on other sites More sharing options...
SMW Posted August 11, 2003 Share Posted August 11, 2003 I got someone to turn the ignition off and listened underneath and the rattle is heard just as the ignition goes off Just read you original post again and this does sound very similiar to what I was experiencing. Toyota actually diagnosed this for me and did a sort of bodge repair by wedging in a piece of rubber:eek: Still haven't got round to sorting it properly. Link to comment Share on other sites More sharing options...
far Posted August 11, 2003 Author Share Posted August 11, 2003 Cheers SMW - I dont think the car has been modded to that extent thats the only thing - it has an after market zorst,dump valve & airfilter and thats about it - unless a mount or something has come off between the pipe & the body ? Link to comment Share on other sites More sharing options...
Scooter Posted August 11, 2003 Share Posted August 11, 2003 Get your friend to depress the clutch and then turn it off and it shouldn't rattle to a stop. Both my 6 speeds have rattled and i put on 13k miles on one and it didn't get worse. I think someone said it could damage the clutch but i just thought i'd do both when the time came as it would save on the labour cost IMO just learn to live with it at the moment and see how it goes Link to comment Share on other sites More sharing options...
far Posted August 11, 2003 Author Share Posted August 11, 2003 Get your friend to depress the clutch and then turn it off and it shouldn't rattle to a stop. Cheers scooter - never thought of that or tried it - if it doesn't rattle when I do that then what does it mean the problem is ? Flywheel ? what is this process confirming ? Link to comment Share on other sites More sharing options...
Scooter Posted August 11, 2003 Share Posted August 11, 2003 It means it does exactly what mine did / does . I think this does point to the flywheel yes. As advised i'd say try other peoples cars and get them to try yours. Almost certainly nothing to worry about short term, granted they wouldn't have left the factory like that but if you can put up with the noise just drive it. I posted about the exact same rattle when i brought my old manual, and was told it was normal. I did look into getting it replaced and was advised that it made sense to do other bits at the same time eg crank seal, bearings & prob clutch. TBH i was going to leave it til the clutch went or something similarly serious, but after 13K miles + woodbridge and pod meets it didn't seem to get any worse, certainly not from the operation / performance side and then i sold it............... Might make it to the crawley meet, so you can hear my current 'Death rattle' and this should make you feel better. Link to comment Share on other sites More sharing options...
far Posted August 11, 2003 Author Share Posted August 11, 2003 Cheers scooter - have had it on a ramp about an hour ago - it wasnt a heat shield etc... we dumped the clutch and turned off - there was no rattle ! - well diagnosed matey top marks - the mech seemed to think it was the clutch though not the flywheel (?) Also I noticed there was a small amount of oil around the gearbox - the mech said it should be fine as long as it doesnt get worse "just keep an eye on it" he said - do you agree people ? Might make it to the crawley meet, so you can hear my current 'Death rattle' LOL:D - look forward to it - my first meet ! hooray Thanks for all the comments today lads as usual u've done me proud - any feedback on the gearbox would be appreciated. Link to comment Share on other sites More sharing options...
Jez sutherland Posted August 11, 2003 Share Posted August 11, 2003 My UK 6 spd makes the same rattle - I assumed if was the flywheel. Hasn't caused any problems - just makes the car sound crap. Same story as scooter - going to get it done at the same time as the clutch etc. Nothing really to worry about I think. Jeremy Link to comment Share on other sites More sharing options...
Scooter Posted August 11, 2003 Share Posted August 11, 2003 Far just to confirm i'm no mechanic the advice i give is solely based on previous advice received etc. I was happy that people said it was normal and that impending doom was not a few miles around the corner. A least you know its a normal thing for the manual sup's now its up to you really as to what you get done and when. For further info, my old manual car (10yrs 93K miles) was noisy in first when in a queue ie clutch fully up no throttle just creeping along (not a rattle noise). Also at tick over (neutral) there was a quiet but noticable noise (rattle / grating) that dissappeared when the clutch was depressed. Also i noticed it made quite a clunk somewhere when you raised the clutch sharply in a queue, a bit like dumping the clutch for a doughnut but with no revs (don't advise you do this too often!) All this makes it sound like the car was shot but it performed perfectly well just a little noisy (if i hadn't had a standard exhaust i might never had noticed) BTW The first two noises are not apparent in my new (5yrs old 42K) manual and there is only a slight amount of clunk / slop on the clutch bite, but the rattle on turn off is the same as the older car. Link to comment Share on other sites More sharing options...
far Posted August 12, 2003 Author Share Posted August 12, 2003 scooter / jez thanks very much for the info seems like I will probably leave this for now Link to comment Share on other sites More sharing options...
Doughie Posted August 12, 2003 Share Posted August 12, 2003 far just to back up further whats been said, my old UK TT manual did exactlyt the same thing. rattle goes when switching off with clutch in. it's the clutch release springs rattling and is a known phenomenon with the manual Supras. this is on http://www.mkiv.com too (if that site is still around). Gavin Loughtons does exactly the same too. cheers Link to comment Share on other sites More sharing options...
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