> -----Original Message----- > From: greg@itasoftware.com [mailto:greg@itasoftware.com]On Behalf Of > Greg Klanderman > Sent: Thursday, July 19, 2001 2:08 PM > To: 928 > Subject: [928] RE: clutch ticking noise when depressed > > > > So once I remove the lower cover, how do I determine what needs > replacing? > > thanks, > greg > > >>>>> Jim Bailey writes: > > > Most likely the release/throw out bearing or pilot bearing is > starting to > > fail the ticking should increase with engine RPM ...... either > one requires > > removing the clutch ... not a big job > > From: Jay Kempf [jkempf@mail.tds.net] Sent: Thursday, July 19, 2001 8:48 PM To: 928 Subject: [928] RE: clutch ticking noise when depressed You really need to pull the whole thing to do a proper assessment. The first time it's a bitch. The second, third and fourth are a lot easier. To check a bearing, throwout or pilot you turn the inner race with your finger while feeling for roughness in the motion. Then you check for wobble. shouldn't be any between the inner and outer races. Then you look for signs of wear on all points of contact on everything. Clean everything with brake parts cleaner and don't inhale (like BC). The dust that comes off of stuff in there isn't very good for you. Check the guide tube where the TO bearing rides on it. Check the pilot shaft where the two disks ride on it. Check the clutch arm little raised areas. Check the ball stud and socket at the top of the arm. Check the intermediate plate, pressure plate and flywheel for signs of uneaven heating or hard spots from chatter. Check for oil at both the rear main seal and at the clutch slave cylinder. Check the front torque tube bearing and the place on the shaft where the coupling rides for wear or play. CHECK THE FLEXIBLE HOSE WHERE THE CLUTCH SLAVE METAL LINE MEETS THE FRAME RAIL NEAR THE STARTER!!!!!!!!!! Put shims in the pressure plate in heads per the manuals to aid in reassembly and adjust the intermediate plate properly (Devek site has a good description). That's all I can think of. It is actually a pretty easy job but you have to have a strong arm to get it all back in there. Jay Kempf 79 US 5ish speed From: Jim Bailey [mailto:jim@928intl.com] Sent: Wednesday, February 05, 2003 9:36 PM To: 928 Subject: [928] RE: Clutch noise-what is it? the pilot bearing fits into the end of the crankshaft and guides / locates the front of the short clutch shaft which passes through the center of the clutch . when the clutch is released engaged pedal up both the crankshaft and the clutch are turning at the same speed and the pilot bearing is not acting like a bearing but when the clutch pedal is depressed the clutch disc and shaft stop turning while the crank shaft still is turning and the pilot bearing must allow it to turn . A bad pilot bearing makes noise with the pedal down . The clutch release bearing "throw out bearing" has the job of allowing a clutch arm which can not spin to attach to a pressure plate which does spin . However when the pedal is pushed down the clutch assembly is pulled back away from the flywheel and the disk(S) and clutch shaft stop turning but the pressure plate is spinning with the engine /flywheel . So if you get noise with the pedal up and it changes by pushing down slightly it is nearly always a release bearing going away . The bearing is getting rough and the race is spinning on the pressure plate spring fingers. The extra load of partly pushing down the pedal stops the race from spinning and has the ball bearings turning . It will eventually eat it's way through the spring fingers and pop out of the pressure plate and the clutch will no longer disengage the clutch pedal will drop to the floor board and you call AAA $ or try do drive / shift with no clutch $$$ . Jim Bailey 928 International Jim@928intl.com www.928intl.com (714)632-9288