Friday 14 August 2009

Bellhousing alignment.

The next major part of the drivetrain to sort out is the alignment of the bellhousing.
As the engine is putting out a bit more power than when it left Ford 37 years ago and Im using a selection of bits not really intended to be put together, it is necessary to make sure the gearbox input shaft is in line with the pilot bearing.
The way to do this is to align the bellhousing to the back of the engine and to the crank centreline.
Step 1
Check that the bellhousing rear face is parrallel to the flywheel. To do this on the Ford you need to mount the block plate first, then the flywheel finally the bellhousing.
With sufficient flywheel bolts removed the DTI was mounted and aligned on the rear face of the bellhousing.
The engine was rotated and the misalignment read from the dial gauge, the miss alignment was less than 0.0015" and therefore I judged acceptable.

Step 2

The next step is to check the alignment of the bellhousing to the crank centreline. To do this the DTI is again mounted to the flywheel but this time the tip is located on the inner register of the flywheel bore.


This time I was looking for a a total miss alignment of no more than 0.005"

With ths standard Ford dowels it was obvious that the alignment was not good enough.

With the missalignment measured I need a set of 0.07" offset dowels to shift the whole housing to the right and up a bit.
A quick call to Real Steel and its just a case of waiting for the post.

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