Restoration & Modification Projects > Modification Projects

My Black Bitza

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wabco40:
I don't know why they would say an air gap between the bearing at rest and the clutch fingers when the bearing at rest is compressed against the clutch fingers to within 1/8" to 3/8" of bottoming out.

For sure, make the spacer between the tranny and bellhousing.

You got me worried about mine so went out to the shed and measured between the compressed bearing face and gearbox case. Mine comes to 60mm which if I was using the same flywheel and clutch as you would give me about 3/16" clearance. Problem is I am using a relatively thin flywheel and centre force clutch. Guess I will have to wait until the weekend to set it up and check.

Scott:
My CSC has no spring pushing it in either direction, so once it's compressed, it stays that way and there is an air gap between the bearing face and the clutch fingers.

bfit:
Scott
Reading this is Confusing
You will need to make sure you have sufficient room to allow for the wear in the clutch.
As the clutch wears the fingers will move back towards the gear box .
In setting  the slave cylinder up its important to get it correct .
If there is not enought clearance at set up then some time as the clutch wears it will start to slip

There should be a shim pack under the hydraulic throw out bearing .
I would like to read the instructions
Bfit

bfit:
Scott
I read your posts on setting up the bellhousing . I have been working on engines and gear boxes for 50 Years I have never  done this procedure  and never had a gear box fail.
But each to There Own

I would point out one fact
Chev engines have 0.0025" to 0.005"  clearance in the main bearing  which means at rest  the crank will sit down in most cases 0.0025 "
This should be taken into consideration  if you really want the bellhousing centred  accurately .
Bfit

Scott:
Link to instructions below.  As you said, normally you measure the gap to allow for clutch wear, then put shims under the bearing until you get the right clearance.
Due to the size of the hyd bearing, and the shallow depth of chev bellhousings, there is insufficient clearance to start with.  So to gain the correct clearance I need to move the clutch (attached to the engine) away from the bearing (attached to the gearbox).  The only way to do that is to add a spacer somewhere between the engine and gearbox.

http://americanpowertrain.com/attachment/38310-.pdf

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