21-10-2019, 09:35 AM
Henry,
Stuart used to make a new c/m upper housing (with added machining allowance), and mill 15 thou off the top face of the lower housing; then, with the block firmly tightened in place, bolt them in the case with correct torque and line bore the assembly (actually he used a massive reamer in a lathe). The centre main housing is fixed with long bolts instead of the Austin studs so as to isolate it from the block. Done like this all three bearings are in line and there is no need for 'adjustment' - fit and forget. If your crankcase is not 'perforated' I would re-use it; otherwise I would suggest to follow the same method with a new case. I can provide comprehensive detail if it is helpful.
May I ask what are your plans for the 'new shaft'?
Regards
Chris
Stuart used to make a new c/m upper housing (with added machining allowance), and mill 15 thou off the top face of the lower housing; then, with the block firmly tightened in place, bolt them in the case with correct torque and line bore the assembly (actually he used a massive reamer in a lathe). The centre main housing is fixed with long bolts instead of the Austin studs so as to isolate it from the block. Done like this all three bearings are in line and there is no need for 'adjustment' - fit and forget. If your crankcase is not 'perforated' I would re-use it; otherwise I would suggest to follow the same method with a new case. I can provide comprehensive detail if it is helpful.
May I ask what are your plans for the 'new shaft'?
Regards
Chris