Topic: Pilot Bearing Removal
in Forum: C3 Driveline Components
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If you have odd wear, you may want to check the flywheel runout as well.
While you are at it, make sure the hole in the bell housing is round and in the right spot. Both can be done with a dial indicator.
Mount the indicator to the flywheel and rotate it to check the hole in the bell housing, with the housing bolted in place. Mount the indicator to the block to measure flywheel runout.
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Thanks for the tip on the flywheel run out. We will have a warm spell in MIchigan on the weekend, so I will check the runout on the flywheel first and then the bellhousing.
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Another, more common issue with odd wear on the pilot bushing is driving habits...
If you like using the engine to slow you down, rather than the brakes, it can wear the pilot quicker than normal, and usually makes the center of it oblong, instead of round.
When downshifting, the input shaft of the trans is spinning waaay faster than the engine rpm(until the clutch is fully released)...this causes rapid wear of the pilot. Eventually, the input shaft just basically starts flopping around in there, thus the un-even wear.
Just an added speck of info...
If you like using the engine to slow you down, rather than the brakes, it can wear the pilot quicker than normal, and usually makes the center of it oblong, instead of round.
When downshifting, the input shaft of the trans is spinning waaay faster than the engine rpm(until the clutch is fully released)...this causes rapid wear of the pilot. Eventually, the input shaft just basically starts flopping around in there, thus the un-even wear.
Just an added speck of info...
Joel Adams
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here is my custom tool i built
the bolt threads the into the soft metal of the bushing very easily and as you run the bolt in it will bottom out and the pilot bushing comes out nicely.
Just replaced my pilot bushing and I drilled 2 holes in sides then split bushing and it fell right out. I also had flywheel cut down it had a bad spot. I was getting a loud rumbling noise when clutch peddal pressed in and engine reved up. I hope this fixes my problem :)
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Duncanville, TX - USA
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Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
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#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
A worn pilot bushing/bearing will definitely make that noise...with the clutch pressed in, revving the engine will let the input shaft flop, and make a grumble noise as it beats itself against the sides of the worn bushing. I bet the fixes the noise.
Joel Adams
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I sure hope so, Now I cant get it in reverse with safety Switch cable hooked up from steering column. I didn't change anything. when Cable hooked to reverse arm its not in reverse. I'm confused don't know what I did? I'm heading down to garage and check it out.
Thanks, ACE
All fixed and good to go, I just forgot to set shifter in reverse before hooking up linkage :) Old age is my guess ! just in time for my week vacation next week SWEET time to go CRUZn ........
Have fun cruzn everyone,
ACE
cthulhu said: here is my custom tool i built
the bolt threads the into the soft metal of the bushing very easily and as you run the bolt in it will bottom out and the pilot bushing comes out nicely.
Link no worky.
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FWIW there's a Chevy pilot bearing w/ needle bearings in it. Should outlast the engine. 
|UPDATED|6/25/2012 11:02:51 AM (AZT)|/UPDATED|
|UPDATED|6/25/2012 11:02:51 AM (AZT)|/UPDATED|
1973 L-82 4 spd
in Forum: C3 Driveline Components
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