318 LA rebuild after losing a valve seat

pt70 said
Righty; there is something wrong with your numbers. The standard size for a 318 rod journal is 2.125. Crankshafts and bearings come in .010, .020, and .030 undersize. --- So, 2.125 less .010 =2.115 -------- 2.125 less .020 =2.105. So, neither would work according to your dimension of 2.110 ! They make 'standards' which are highly accurate pins which are used to calibrate [zero in] micrometers.

I'll double check, but I measured both with my digital caliper and micrometer. They are VERY well cared for and cailbrated Starrett and Mitutoyo tools. I do have standards, just for kicks I'll calibrate the mic again.

George Jets said
Yes, trying to figure out what is wrong here.
^^^^^
Righty should look over the paperwork on his reman crankshaft that he says is a
.040 /.040 undersized reman. Also should remeasure his rod journals again.

Kind of starting to look like it is a
.040/.020 from reading this post.

.040 oversized bearings on a .020 crank rod journal is going to lock that rod to the crank when assembled.

Definitely something going on here with the wrong bearing sizes.

My crank is .030 under, I apologize if I said in an earlier post that it's .040. This was mentioned a while back in this thread, and I had .040 on my mind because my cylinders are .040 over. Either way, I'll dig up the paperwork and check. Maybe it's .030/.020? My guess is that even a .030 bearing on a .020 journal would still have problems. Ten thou is a lot.