4th Throw-out bearing...Frustrated! - Hot Rod Forum : Hotrodders Bulletin Board
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Old 11-17-2004, 07:57 AM
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Unhappy 4th Throw-out bearing...Frustrated!

I've got a 68 camaro with a M20 4-speed transmission, and I can't seem to permanently fix my throw-out bearing problem. It started with the old engine in the car. I had to replace it 3 times because when the clutch was pressed in, it would make a annoying spinning noise. Since then, I've put in a new engine (same as old 350), and a new performance clutch with a "longer" performance throw-out bearing. There are less than 500 miles on the clutch, and the bearing is making a noise again.

Obvisiously to go through 4 throw-out bearings in under 5000 miles is a bit ridiculous. Any clue what might be causing this problem? I'm frustrated to no end and would really like to fix it for good! Thanks so much!
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Old 11-17-2004, 08:56 AM
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bearings

Stock bell or blowproof????

Keith
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Old 11-17-2004, 09:01 AM
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What fork?

Mechanical or hyd.?
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Old 11-17-2004, 11:46 AM
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Is the front bearing retainer on the Muncie worn excessively?

Vince
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Old 11-17-2004, 02:31 PM
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Stock bell and mechanical clutch. I'm not sure about the front bearing retainer.

Sadly, being a novice with little workspace I haven't had as much chance to check into it myself, therefore i have to take it to a shop each time it blows out. They seem content to just install a new one and call it "fixed" for a month.....
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Old 11-18-2004, 07:46 AM
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What about the pivot ball in the bellhousing? Was that replaced?
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Old 11-18-2004, 01:05 PM
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bearing

Sounds like you need to be looking for a new shop to take your car to......

Like vince stated i would look into the bearing retainer on the front of the trans next. Do you by any chance ride with you foot on the clutch?????? Throwout bearings are kinda tough so i would think there should be some typ of easy to spot problem... It's odd to me that it did it before and after changing the engine and clutch. I would also take the time to indicate the mounting hole in the bell to see if something crazy is going on there..... Are you having an other symptoms??? like clutch chatter??? Vibration??? Etc..... Also look at the pilot bearing in the crank...

Keith
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Old 11-18-2004, 11:35 PM
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Could it be adjusted wrong. If there's not enough free play, the bearing will spin constantly & wear out quickly.
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Old 11-19-2004, 05:11 AM
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also............you don't necessarily need the "long" bearing. It may as Jim says be partially engaged all the time.
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Old 11-19-2004, 01:49 PM
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Thanks for all the help guys. I'm going to take a closer look at things this weekend and get back with more information. You've give me alot of good ideas!
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Old 11-22-2004, 09:56 AM
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The long bearing with a stock ball stud and clutch hieght will change the angle of fork in relation to the clutch fingers. A side loading severe enough will detroy a bearing in short order.
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