[btroy]

Rebuilding a 4.3 Cevy 91 S10, when I installed the crankshaft I was able to turn it by hand after the torque., after I started installing the pistons I noticed I could not turn the engine anymore by hand. The book says I should be able to turn it by hand to check for binding, Does it matter what pistons go in which cylinder? I did match up the bearing caps to the rods via the lettering on each. I would think it should get harder to turn since it has new rings but I can not turn it at all anymore by hand. take a wrench to turn it now and its hard to turn.

Each piston is facing the front. I have a new rebuild kit I am using.

what are the markings on each piston for?
I have 2 marked A, 1 B, 1 C, 1 L,1 M.

btroy