So I'm in the middle of building a b20 block and after measuring both my main bore and crank shaft. I'm left with .004 bearing clearance.

Have in mind that the crank is standard spec but the main bore was bored out which is probably why my clearance is out of (spec .002).

Would I be ok running .004 with ACL bearings???

Please help thanks

 

.004 overall right? (.002" per side)

That's a ton of clearance either way. What are you measuring with?

I don't even run that much clearance in a blown alcohol engine with straight 50wt oil

 

Yeah its too much 0.004.

You mics everyting 3 times to be sure of the actual i.d of the main journal?

 

Yes I'm measuring with an Outside Micrometer and telescopic gauge.

I will update you guys if i figure it out thanks for the replies