By my reckoning I have 0.57mm (0.0224") gap with oversize bearings in place. With everything in situ, oiled and running, will that translate to 0.57 endfloat, or will the film of oil or any other factor change that figure for endfloat?
As you can tell, I'm getting desperate now. Gonna fit oversize and see how she goes. Cant imagine anything will implode with 1/4mm too much movement.
Your arithmatic seems ok. but you need to trial fit and measure to be sure..there's always a wee bit of difference.
That seems to be about double the max tolerance, apart from issues related to conrods etc, the crankshaft lashing about that much could allow one thrust washer to fall out after a bit of wear, if one falls out the other soon follows meaning back to square one.
Theres a way of making the thickest washer thicker!! its an old engine builders trick so its down to your fitting skills. using brass countersunk rivets, four equidistantly placed, rivet two
thrust bearings together, back to back and file for the correct thickness..
A better way is to make your own thrust washers out of phospher bronze. Again its down to your fitting skills, used to be used to salvage a block that had lost metal on the thrust faces. On race engines we used to pin them in place using brass dowels about 4mm thick. got to take the crank out to do that though.
Or if its the crank thats lost metal get a new crank.. go give the cat another kick.
Has the crankshaft ground into the main bearing cap that retains the washers??
Just noticed you live in hampshire so do I, do you have access to a bench, vice??