crank help asap ins

[eurodad]

@tom vito

The rest of the story.

This is a 400 sbc that neonracer bought off of eurodad. Ended up needing a new crank. So he bought a new Scat. We have found the following issues,

1. some of the rod clearances on the counterweights are not fully ground as deep as the stock crank was.

2. there is NO side to side rod clearance on the 3-4 journal. The 7-8 and 5-6 journals only have about .007 inch of side to side clearance. My believe is that the no side to side clearance is what is causing the lock up.

I always turn the motor after each piston goes in. And we have check clearance on the bearings and they are actually a bit loose. But still within reason.

So for now it looks like some machine work to the rods to get some side to side clearance.

:doh: should have just bought my 350.