RB25DET Balancer Fitment- Brand new, not tight?

[CLEM0]

Hello-

Just got a query regarding the fitment of an RB25 balancer/crank pulley on the crankshaft.

I have tried two seperate engines with a brand new balancer on them, and 2 seperate used balancers, and both engines with all 3 balancers are fairly easy to get on by hand, and can spin fully around just by hand. It isn't loose but not what i'd consider tight/interference fit.

Is the interference fit on the face of the crank when the bolt it tightened, or the the sides of the crank? I don't know why this is not rock solid...

Are both crankshafts out of round, or is this how they're meant to be? I am struggling to believe that two seperate good condition engines that both ran perfectly before taking balancer off (timing belt) - both don't fit very tight with a brand new genuine OEM balancer. It just seems odd.

Cheers.

[hardsteppa]

It is odd. Balancer should be snug, never had it go on/off just by hand.