[rrlwb]

Having trouble torquing down the connecting rods after installing rod bearings. After torquing down pistons 1 & 2, I'm finding the crank impossible to spin, which is required to torque the other rods down. I've broken 2 breaker bars attempting its rotation. Once both con rod pistons are loosened up then she'll spin. Anyone been here before? 30 yrs of experience and I've never seen this one. Thanks.

 

[JS5D]

The obvious question would be: are you sure you are not using oversized bearings. Also one can fit be bearings the wrong way around which will cause an interference with the anti spinning indent

All pretty obvious (especially to a person with 30 yrs experience) but maybe just look everything over again in the morning.

Maybe the bearings are just plain wrong and you need to try another set.

Anyway folks, that is why you spin the crank after every bearing fit! Don't want to fry those bearings at first startup. When I did my 3.5 I could spin by hand for the first 4 big ends, then it got a bit too heavy with slight increases for every piston added, but with all 8 in place I could comfortably spin it with normal ratchet with one hand.

 

[rrlwb]

STD bearings came out so STD went back in.