Porsche 3.2 Carrera Clutch Change.....

[dilbert]

Currently got the engine and gearbox separate and on the floor, with the clutch out.

The clutch fork has a pivot pin and (if you know what I mean) the pin has an inner and an outer bearing. The outer bearing is removed, but the inner one is in a blind hole, in the bellhousing casting.

Does anyone have any idea of a good way to remove it???

Any help mucho appreciato!

[steve_d]

Am I right in thinking the bearing case (not the alloy housing) has a hole in the back and that the bearing is in a blind hole in the 'box?

If so then leave the needle rollers in the bearing and half fill the bearing with grease. Insert the shaft into the bearing and hit the end of the shaft with a soft face mallet. The hydraulic pressure of the grease passing out of the back of the bearing and into the housing will force the bearing body out.

Steve

[dilbert]

steve_d said:

Am I right in thinking the bearing case (not the alloy housing) has a hole in the back and that the bearing is in a blind hole in the 'box?

If so then leave the needle rollers in the bearing and half fill the bearing with grease. Insert the shaft into the bearing and hit the end of the shaft with a soft face mallet. The hydraulic pressure of the grease passing out of the back of the bearing and into the housing will force the bearing body out.

Steve

If only. Solved now though!

On my gearbox, the outer bearing shell did have a hole in it. In addition the end of the pivot pin had a tapped hole in it. I was able to make an improvised puller from a straight pipe/conduit fitting, a big washer, a piece of studding, and a nut to draw the pivot pin out. The stud goes into the end of the pivot. The pipe fitting, washer and the nut go onto the free end of the stud in that order. As you tighten the nut, the pin is drawn into the pipe fitting.

Thats the pin and the outer bearing shell out.

Then you have the inner shell. It's an a blind hole, and on mine the shell didn't have a hole in it. Blind shell, in a blind hole. Faffed and farted about for ages. Tried to pull the shell out with grips, but it's so brittle it breaks up. Try breaking the shell up and picking it out in pieces, but it's too easy to damage the hole.

In the end the solution was to drill an 7.5mm hole in the bellhousing using a long series drill, and follow through into the back of the blind hole in which the bearing had been pushed. Using a 7mm steel rod as a punch, able to tap the bearing shell out of it's hole with the rod and a hammer from outside the bellhousing.

We tried a smaller hole, but the rod just kept bending. If anyone else needs to know, 7mm is the size!

Perhaps it's not to pretty, but it worked, won't do too much harm, the gearbox bellhousing already has some pretty big holes in it by default.

Thanks Steve, for taking the time to post (It is the G50 box (early release mechanism)).

Edited by dilbert on Saturday 2nd December 19:52