Re: M/C bleeding

Cracking a line at the M/C serves the same function as a bleeder screw if installed at the same place. When the line is loosened, fluid can be expelled, and with it air, by stroking the pedal. As with all manual bleeding, the line must be tightened before releasing the pedal. The pedal can then be released, fluid will be drawn into the cyl. from the reservoir, pressure can then be applied again to the pedal, the line opened, fluid and air expelled, etc.

The sequence can then be repeated for the other section of the M/C.
By performing full stroke bleeding of each section separately, you can be assured of eliminating virtually all air from the M/C.

As to the "wheezing", two possibilities:
1. You are hearing the check valve and/or the diaphragm of the booster.
2. You are hearing the diaphragm of the vacuum pump on the engine.

Those sounds should disappear after several strokes of the pedal, after engine shut down, i.e., when all vacuum has been exhausted. If they continue in a no vacuum situation, a damaged diaphragm is likely.