(25-04-2018, 10:04 PM)Stephen Barker Wrote:(25-04-2018, 09:48 PM)Colin Reed Wrote: Hi Stephen,
My advise would be fit the new shells in the block and have who ever is doing the Grinding to measure,
Reason for this is they are mass produced and there will be tolerances, also the housing could be out of round.
Every ones feel with a Micrometer is different especially going from inside to outside.
Do not assume the shells and housing are correct Check
Colin
NZ
Thank you all for your replies.
I have checked the crankshaft, it is 1.71 but when torquing the centre bearing with the - 40 shells, crankshaft spins easily up to 46lbs torque, but when torqued to 50lbs it almost locks up and gets really tight. Any reasons?
‘With the shells just held together by hand round the crank, should the ends of the shells meet each other because I have a 30 thou gap. This would allow the shells to slip round slightly in the caps which can’t be right,.’
Do them up 'wrist tight', then give the side of the housing a tap with a ball-pein hammer before torqueing up to snap the shells into alignment.
I hesitate to comment on your torque but mine (as I mentioned, a pressure fed Reliant crank conversion) are done up to 30lbft. I think it's a different structure so maybe you're right.