The pulley bolt pattern on my crankpulley is .0024 off from center. I'm being **** thinking it should be dead nuts 0, right?

 

The bolt pattern doesn't matter. It's centered on the ballancer by the hole in the middle not the bolts.

 

I'm going to assume the balancer is drilled center. There is more slop in the center than by the bolts holes. So if its centered with the pulley and that's a reasonable amount of slop, than I'm golden.

 

What made you measure that? Surely you couldn't see the difference?

 

So your saying your pulley doesn't fit snug on the ballancer?

I'm going to say it'll be fine with a little runout like that. I've had pulleys visibly wabble, and be fine up to 4000 RPMs.

 

I measured it cause I had clearance issues with a couple bolt heads. 2 bolts fit with plenty of room, 2 didn't. I hade to clearance the inside of the pulley for the bolts to fit. If the bolt pattern was true the bolts should have fit. Like Gary said I didn't eye .0024, but I could definitely eye the slop in the center being more than the bolts holes.

 

Strange. And, the error is on the crank?

 

I'm collecting parts for the lower end, so I don't have the balancer on the crank yet but interested to see when we get there. Like I said I had bolt clearance issues and when I measured, I found the pattern (on the pulley) to be off from center .0024 (yes 2.4 thousandths). I could have used different bolts, with a smaller head and it would have fit.

 

 

So the pulley doesn't fit snug on the snout of the balancer? The pic looks like there's a gap all the way around.

Here's a pic of my balancer and pulley. It's a snug fit, not a interference fit, but it doesn't have any wiggle room.

 

Yes I see what you meen, no mine is nowhere near that close of a fit.

 

Now that's its bolted up, it looks pretty centered. I still have some clean up to do tho.

 

Ya, that doesn't look bad at all. So what's the plans? You running a blower with that belt?

 

no, just a gilmer drive for the water pump and alt.