Hey all!

I have an 85 manual, my question is can I replace the throw out bearing with out dropping the clutch?

Thx,
Dan

 

No

 

Damn! Andrew, would I have to replace clutch components, or could I only do the bearing. How difficult of a job is this?

Thx

 

You want to replace the pilot bearing too.

 

Does it go by another name other than pilot bearing, couldnt find it in PET?

 

928.102.111.02

I think this is the PET number

 

You can do just the TO if you want. Of course you want to inspect everything while you're at it. If the pilot bearing's age is questionable replace it, or you could end up with a stuck intermediate shaft like John in Atlanta. (deleriousga)

 

BTW, the pilot bearing is the bearing that sits in the flywheel where the intermediat shaft rides.

 

Andrew and Andre,

Thanks for the help and advice! One last question does the WSM's show a pictore of the pilot bearing?

Dan

 

They don't show it per se... but this is where it goes (red).

 

Show the crank shaft ?

 

The 928 clutch is somewhat different from the usual design, and there are a few gotchas hiding in there...

I would strongly suggest that you need to get the Factory Workshop manuals! The best source is the set of 928 tech info CDs prepared by Jim Morehouse - a HUGE amount of tech info, and easily the best money that you will ever spend on your 928.

Jim's email address is jim298ATptd.net - change the AT to @

 

The pilot bearing is a standard size ... available at any industrial supply shop ( sorry, forget the number): Buy the very best 'DS' ( double shielded) one available for ~$7, and install.

 

Isnt the throwout bearing really the pilot bearing? as it really only spins when the clutch is engaged, where the flywheel is spinning, but the drive shaft is not. when in gear or in neutral, with no clutch, the flywheel speeds match the input shaft speeds, so its not being used.

the throwout bearing is always spinning, but it is a bearing that is pretty stout, as it is used to pull against the spring pressure of the pressure plates and disengage the clutch to the flywheel. but, its always spinning, as long as the torque tube drive shaft is spinning. so, if you push in the clutch and hear a noise, its ironically, not the throwout bearing, its the pilot bearing.let the clutch out and hear a noise, its the throwout bearing.

mk

 

The throw out (TO) bearing (aka release bearing) is not always spinning. With the clutch disengaged, only the flywheel spins - not the clutch pack.

But you're right in that when in gear or in neutral with the clutch engaged, the pilot bearing is not spinning (well... it better not be ).

So you're diagnosis should be the following:

Clutch pedal out => Clutch engaged => noise = T.O. Bearing
Clutch pedal in => Clutch disengaged => noise = Pilot bearing

Edit: Sorry, I re-read your post, Mark. Diagnosis is the same...