I can spin it by hand grabbing the crank pulley till I am out of breathe and can spin it both ways. It has no drag at all when the plugs are out but is tough to spin when plugs are in
well that is normal just from the compression of the pistons...
May sound stupid but can you turn the flywheel without the plugs in? tranny in neutral or if standard with clutch pedal depressed...The reason I am asking is if the motor was seized and you freed it up with a breaker bar on the crank maybe the crank broke in half and it is still siezed on the back half of the motor....I know it sounds far fetched but it could happen
If it is free at the flywheel and the starter is engaging but still won't spin it, then it must be a weak starter or battery
