I just installed my callies crank and compstar rods and noticed that the #1 and #2 and #7 and #8 rods move almost to none side to side ( just by feel ) compared to #3,4,5 and 6 which moves quite a bit more. nothing has been torqued down and rods move freely on the pins. Is this a common problem ?

 

Anyone have any thoughts on this ?

 

Mine were all around .0016 side to side. Tsp forged 408 rotating assembly.

 

Make sure the rods are racing the right way. There should be a bevel around the bearing bore which should face away from the other rod and toward the crank cheek.

 

U mean .016??

 

Yes I do, both sides are beveled , a large and small size and I have the large bevel side facing the crank. Like I said, its only on the ends of the crank

 

Bearing shells all the same (narrow) or chamfered uppers/lowers mixed up

 

bearings don't come cloes enough to the edges. Ive had #1 piston in before, playing with cam timing ( trying to teach this old dog new tricks ) and had no movement problems as far as movement on the crank. It does have very little movement just nothing like #3,4,5, and 6

 

What crank? Stock?

 

callies 4inch stroke ( 408 ) and compstar rods

 

And you're sure the upper and lower bearing shells aren't mixed? The sides will hang up on the radius of the crank journal if they're mixed up.

 

No, not 100% sure, i was taking my time and i had my coke bottle glasses on,lol i will go back and recheck.Just couldn't see any problem at the time

 

Guessing the Compstar being the budget Callie's probably has .125" radii and not the .140" of stronger higher dollar cranks. If bearing shells are correct then a simple vernier caliper inside cheek to cheek measurement of looser throws compared to tighter throws. Checking if the crank was inconsistently ground. Either a quality cheek re-dressing or rod big end thrust touch up on a belt sander....looking for between .006" and .015" side clearance with .020" being an absolute maximum.

 

If the bearings check out correctly then yes, the belt sander comes out.

 

Yea .016. Tsp told me .016 to .020 was where they ended up usually.

 

Thank you guys, I had the bearings mixed up, lower on upper and so on. side to side measures .017, thanks again

 

Cool, glad you got it figured out. I know I can't say I haven't done that once or twice on accident.