Thread: How freely crank has to turn after assembly?

We did use same King bearings 3 months ago on Roller Rocker DE rebuild without problems. Bearings had some scratches, so who knows what happened...

Btw. we did need aprox. 10Nm to rotate crank with rods and pistons.

too loose is a problem crank should move with some little to no effort.. surpised nobody checks the bearing clearances and crank end play. a plasti gauge is a good tool... i rebuild CAT C-10 C-12 And C-15 and C-18 engines every day and always check the bearing clearances even if its a virgin engine STD bearing replacement.. out of 20ish rebuilds ive had 1 main bearing imporperly machined giving me a very loose clearance of .007. max allowable .002-.003, thats not good.. not good just slapping in bearings, always check your clearances..

I agree 100%. Plastiguage is a must even with new bearings. Last sr I built I plastiguaged with new ACL bearings and ended finding a problem. As for end play, I should know better, but I never check it as long as my thrust bearings are good. I don't think I have heard of an sr having crank walk issues. However, always better to be safe than sorry.