HKSZ Posted October 28, 2015 Posted October 28, 2015 I can hear a slight low frequency noise when sitting in my car while idling? Put my foot on the clutch pedal the noise goes away, release it comes back so that would rule out thrust bearing. You need a keen ear to hear it and there is no strange sounds driving so i wonder if it's the start of engine bearing or box bearing any way of deciding? Quote
KatoKid Posted October 28, 2015 Posted October 28, 2015 Sounds like gearbox bearings to me. gav240z 1 Quote
Linton Posted October 28, 2015 Posted October 28, 2015 gearbox, if it was the other way it would be the thrust bearing. the thrust can make a noise if it is just touching and is dry, but you would hear it come on once you used the clutch not go away Quote
dat2kman Posted October 28, 2015 Posted October 28, 2015 If the thrst bearing is jst losely touching the clutch fingers, and if worn, then yes, t can wobble about and harmonc. As soon as you put fot pressure n clutch pedal, it loads the bearing onto its races, and the note changes/dissappears. Just because your foot is off the clutch pedal, does not mean the thrust bearing is not in contact, unless you have a return spring on clutch fork, and have the slave pushrod adjustable. Quote
pauly_adams Posted October 28, 2015 Posted October 28, 2015 I would be looking at your spigot bush, could be thrust bearing also Quote
HKSZ Posted October 28, 2015 Author Posted October 28, 2015 Hmm, I'd like to hope its only the thrust bearing. Maybe I'll remove the slave cyl see if the fork / carrier backs off the clutch Quote
Administrators gav240z Posted October 29, 2015 Administrators Posted October 29, 2015 I've got the same issue in my FD RX-7 a slightly noise with the clutch disengaged and when it's engaged it goes away. It's not loud enough to drop the gearbox and be worried about it. Quote
KatoKid Posted October 29, 2015 Posted October 29, 2015 Most manual gearboxes, even near new ones will have some degree of roll over noise. You should hear the T56 in my Commonwhore...as Gav says no where bad enough to pull and fix. Quote
dat2kman Posted October 29, 2015 Posted October 29, 2015 Get underneath t, and pull the clutch fork right back so its knda loose/wiggly, then go start car, f noise s gone, its the thrust bearing. Pulling it right back has t clear from the clutch cover fingers. Quote
oldmates260z Posted October 29, 2015 Posted October 29, 2015 My Sports has this noise and its normal. Do you have a early model 240 box (which is very similar to the Sports)? Quote
HKSZ Posted January 18, 2016 Author Posted January 18, 2016 I managed to drop the clutch slave away and pull on lever, no change in noise so I guess a box rerace will be on the cards some time. Quote
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